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 | * |
| 6 | * Copyright (c) 2002, 2003, 2004, 2005 PyX Technologies, Inc. |
| 7 | * Copyright (c) 2005, 2006, 2007 SBE, Inc. |
| 8 | * Copyright (c) 2007-2010 Rising Tide Systems |
| 9 | * Copyright (c) 2008-2010 Linux-iSCSI.org |
| 10 | * |
| 11 | * Nicholas A. Bellinger <nab@kernel.org> |
| 12 | * |
| 13 | * This program is free software; you can redistribute it and/or modify |
| 14 | * it under the terms of the GNU General Public License as published by |
| 15 | * the Free Software Foundation; either version 2 of the License, or |
| 16 | * (at your option) any later version. |
| 17 | * |
| 18 | * This program is distributed in the hope that it will be useful, |
| 19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 21 | * GNU General Public License for more details. |
| 22 | * |
| 23 | * You should have received a copy of the GNU General Public License |
| 24 | * along with this program; if not, write to the Free Software |
| 25 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 26 | * |
| 27 | ******************************************************************************/ |
| 28 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 29 | #include <linux/net.h> |
| 30 | #include <linux/delay.h> |
| 31 | #include <linux/string.h> |
| 32 | #include <linux/timer.h> |
| 33 | #include <linux/slab.h> |
| 34 | #include <linux/blkdev.h> |
| 35 | #include <linux/spinlock.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 36 | #include <linux/kthread.h> |
| 37 | #include <linux/in.h> |
| 38 | #include <linux/cdrom.h> |
Paul Gortmaker | 827509e | 2011-08-30 14:20:44 -0400 | [diff] [blame] | 39 | #include <linux/module.h> |
Roland Dreier | 015487b | 2012-02-13 16:18:17 -0800 | [diff] [blame] | 40 | #include <linux/ratelimit.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 41 | #include <asm/unaligned.h> |
| 42 | #include <net/sock.h> |
| 43 | #include <net/tcp.h> |
| 44 | #include <scsi/scsi.h> |
| 45 | #include <scsi/scsi_cmnd.h> |
Nicholas Bellinger | e66ecd5 | 2011-05-19 20:19:14 -0700 | [diff] [blame] | 46 | #include <scsi/scsi_tcq.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 47 | |
| 48 | #include <target/target_core_base.h> |
Christoph Hellwig | c4795fb | 2011-11-16 09:46:48 -0500 | [diff] [blame] | 49 | #include <target/target_core_backend.h> |
| 50 | #include <target/target_core_fabric.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 51 | #include <target/target_core_configfs.h> |
| 52 | |
Christoph Hellwig | e26d99a | 2011-11-14 12:30:30 -0500 | [diff] [blame] | 53 | #include "target_core_internal.h" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 54 | #include "target_core_alua.h" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 55 | #include "target_core_pr.h" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 56 | #include "target_core_ua.h" |
| 57 | |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 58 | static struct workqueue_struct *target_completion_wq; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 59 | static struct kmem_cache *se_sess_cache; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 60 | struct kmem_cache *se_ua_cache; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 61 | struct kmem_cache *t10_pr_reg_cache; |
| 62 | struct kmem_cache *t10_alua_lu_gp_cache; |
| 63 | struct kmem_cache *t10_alua_lu_gp_mem_cache; |
| 64 | struct kmem_cache *t10_alua_tg_pt_gp_cache; |
| 65 | struct kmem_cache *t10_alua_tg_pt_gp_mem_cache; |
| 66 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 67 | static void transport_complete_task_attr(struct se_cmd *cmd); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 68 | static void transport_handle_queue_full(struct se_cmd *cmd, |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 69 | struct se_device *dev); |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 70 | static int transport_generic_get_mem(struct se_cmd *cmd); |
Roland Dreier | bc187ea | 2012-07-16 11:04:40 -0700 | [diff] [blame] | 71 | static int target_get_sess_cmd(struct se_session *, struct se_cmd *, bool); |
Nicholas Bellinger | 39c05f3 | 2011-10-08 13:59:52 -0700 | [diff] [blame] | 72 | static void transport_put_cmd(struct se_cmd *cmd); |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 73 | static void target_complete_ok_work(struct work_struct *work); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 74 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 75 | int init_se_kmem_caches(void) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 76 | { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 77 | se_sess_cache = kmem_cache_create("se_sess_cache", |
| 78 | sizeof(struct se_session), __alignof__(struct se_session), |
| 79 | 0, NULL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 80 | if (!se_sess_cache) { |
| 81 | pr_err("kmem_cache_create() for struct se_session" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 82 | " failed\n"); |
Andy Grover | c8e31f2 | 2012-01-19 13:39:17 -0800 | [diff] [blame] | 83 | goto out; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 84 | } |
| 85 | se_ua_cache = kmem_cache_create("se_ua_cache", |
| 86 | sizeof(struct se_ua), __alignof__(struct se_ua), |
| 87 | 0, NULL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 88 | if (!se_ua_cache) { |
| 89 | pr_err("kmem_cache_create() for struct se_ua failed\n"); |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 90 | goto out_free_sess_cache; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 91 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 92 | t10_pr_reg_cache = kmem_cache_create("t10_pr_reg_cache", |
| 93 | sizeof(struct t10_pr_registration), |
| 94 | __alignof__(struct t10_pr_registration), 0, NULL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 95 | if (!t10_pr_reg_cache) { |
| 96 | pr_err("kmem_cache_create() for struct t10_pr_registration" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 97 | " failed\n"); |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 98 | goto out_free_ua_cache; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 99 | } |
| 100 | t10_alua_lu_gp_cache = kmem_cache_create("t10_alua_lu_gp_cache", |
| 101 | sizeof(struct t10_alua_lu_gp), __alignof__(struct t10_alua_lu_gp), |
| 102 | 0, NULL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 103 | if (!t10_alua_lu_gp_cache) { |
| 104 | pr_err("kmem_cache_create() for t10_alua_lu_gp_cache" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 105 | " failed\n"); |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 106 | goto out_free_pr_reg_cache; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 107 | } |
| 108 | t10_alua_lu_gp_mem_cache = kmem_cache_create("t10_alua_lu_gp_mem_cache", |
| 109 | sizeof(struct t10_alua_lu_gp_member), |
| 110 | __alignof__(struct t10_alua_lu_gp_member), 0, NULL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 111 | if (!t10_alua_lu_gp_mem_cache) { |
| 112 | pr_err("kmem_cache_create() for t10_alua_lu_gp_mem_" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 113 | "cache failed\n"); |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 114 | goto out_free_lu_gp_cache; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 115 | } |
| 116 | t10_alua_tg_pt_gp_cache = kmem_cache_create("t10_alua_tg_pt_gp_cache", |
| 117 | sizeof(struct t10_alua_tg_pt_gp), |
| 118 | __alignof__(struct t10_alua_tg_pt_gp), 0, NULL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 119 | if (!t10_alua_tg_pt_gp_cache) { |
| 120 | pr_err("kmem_cache_create() for t10_alua_tg_pt_gp_" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 121 | "cache failed\n"); |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 122 | goto out_free_lu_gp_mem_cache; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 123 | } |
| 124 | t10_alua_tg_pt_gp_mem_cache = kmem_cache_create( |
| 125 | "t10_alua_tg_pt_gp_mem_cache", |
| 126 | sizeof(struct t10_alua_tg_pt_gp_member), |
| 127 | __alignof__(struct t10_alua_tg_pt_gp_member), |
| 128 | 0, NULL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 129 | if (!t10_alua_tg_pt_gp_mem_cache) { |
| 130 | pr_err("kmem_cache_create() for t10_alua_tg_pt_gp_" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 131 | "mem_t failed\n"); |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 132 | goto out_free_tg_pt_gp_cache; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 133 | } |
| 134 | |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 135 | target_completion_wq = alloc_workqueue("target_completion", |
| 136 | WQ_MEM_RECLAIM, 0); |
| 137 | if (!target_completion_wq) |
| 138 | goto out_free_tg_pt_gp_mem_cache; |
| 139 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 140 | return 0; |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 141 | |
| 142 | out_free_tg_pt_gp_mem_cache: |
| 143 | kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache); |
| 144 | out_free_tg_pt_gp_cache: |
| 145 | kmem_cache_destroy(t10_alua_tg_pt_gp_cache); |
| 146 | out_free_lu_gp_mem_cache: |
| 147 | kmem_cache_destroy(t10_alua_lu_gp_mem_cache); |
| 148 | out_free_lu_gp_cache: |
| 149 | kmem_cache_destroy(t10_alua_lu_gp_cache); |
| 150 | out_free_pr_reg_cache: |
| 151 | kmem_cache_destroy(t10_pr_reg_cache); |
| 152 | out_free_ua_cache: |
| 153 | kmem_cache_destroy(se_ua_cache); |
| 154 | out_free_sess_cache: |
| 155 | kmem_cache_destroy(se_sess_cache); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 156 | out: |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 157 | return -ENOMEM; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 158 | } |
| 159 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 160 | void release_se_kmem_caches(void) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 161 | { |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 162 | destroy_workqueue(target_completion_wq); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 163 | kmem_cache_destroy(se_sess_cache); |
| 164 | kmem_cache_destroy(se_ua_cache); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 165 | kmem_cache_destroy(t10_pr_reg_cache); |
| 166 | kmem_cache_destroy(t10_alua_lu_gp_cache); |
| 167 | kmem_cache_destroy(t10_alua_lu_gp_mem_cache); |
| 168 | kmem_cache_destroy(t10_alua_tg_pt_gp_cache); |
| 169 | kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 170 | } |
| 171 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 172 | /* This code ensures unique mib indexes are handed out. */ |
| 173 | static DEFINE_SPINLOCK(scsi_mib_index_lock); |
| 174 | static u32 scsi_mib_index[SCSI_INDEX_TYPE_MAX]; |
Nicholas Bellinger | e89d15e | 2011-02-09 15:35:03 -0800 | [diff] [blame] | 175 | |
| 176 | /* |
| 177 | * Allocate a new row index for the entry type specified |
| 178 | */ |
| 179 | u32 scsi_get_new_index(scsi_index_t type) |
| 180 | { |
| 181 | u32 new_index; |
| 182 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 183 | BUG_ON((type < 0) || (type >= SCSI_INDEX_TYPE_MAX)); |
Nicholas Bellinger | e89d15e | 2011-02-09 15:35:03 -0800 | [diff] [blame] | 184 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 185 | spin_lock(&scsi_mib_index_lock); |
| 186 | new_index = ++scsi_mib_index[type]; |
| 187 | spin_unlock(&scsi_mib_index_lock); |
Nicholas Bellinger | e89d15e | 2011-02-09 15:35:03 -0800 | [diff] [blame] | 188 | |
| 189 | return new_index; |
| 190 | } |
| 191 | |
Nicholas Bellinger | dbc5623 | 2011-10-22 01:03:54 -0700 | [diff] [blame] | 192 | void transport_subsystem_check_init(void) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 193 | { |
| 194 | int ret; |
Andy Grover | 283669d | 2012-07-30 15:54:17 -0700 | [diff] [blame] | 195 | static int sub_api_initialized; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 196 | |
Nicholas Bellinger | dbc5623 | 2011-10-22 01:03:54 -0700 | [diff] [blame] | 197 | if (sub_api_initialized) |
| 198 | return; |
| 199 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 200 | ret = request_module("target_core_iblock"); |
| 201 | if (ret != 0) |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 202 | pr_err("Unable to load target_core_iblock\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 203 | |
| 204 | ret = request_module("target_core_file"); |
| 205 | if (ret != 0) |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 206 | pr_err("Unable to load target_core_file\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 207 | |
| 208 | ret = request_module("target_core_pscsi"); |
| 209 | if (ret != 0) |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 210 | pr_err("Unable to load target_core_pscsi\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 211 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 212 | sub_api_initialized = 1; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 213 | } |
| 214 | |
| 215 | struct se_session *transport_init_session(void) |
| 216 | { |
| 217 | struct se_session *se_sess; |
| 218 | |
| 219 | se_sess = kmem_cache_zalloc(se_sess_cache, GFP_KERNEL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 220 | if (!se_sess) { |
| 221 | pr_err("Unable to allocate struct se_session from" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 222 | " se_sess_cache\n"); |
| 223 | return ERR_PTR(-ENOMEM); |
| 224 | } |
| 225 | INIT_LIST_HEAD(&se_sess->sess_list); |
| 226 | INIT_LIST_HEAD(&se_sess->sess_acl_list); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 227 | INIT_LIST_HEAD(&se_sess->sess_cmd_list); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 228 | spin_lock_init(&se_sess->sess_cmd_lock); |
Nicholas Bellinger | 41ac82b | 2012-02-26 22:22:10 -0800 | [diff] [blame] | 229 | kref_init(&se_sess->sess_kref); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 230 | |
| 231 | return se_sess; |
| 232 | } |
| 233 | EXPORT_SYMBOL(transport_init_session); |
| 234 | |
| 235 | /* |
Nicholas Bellinger | 140854c | 2011-08-31 12:34:39 -0700 | [diff] [blame] | 236 | * Called with spin_lock_irqsave(&struct se_portal_group->session_lock called. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 237 | */ |
| 238 | void __transport_register_session( |
| 239 | struct se_portal_group *se_tpg, |
| 240 | struct se_node_acl *se_nacl, |
| 241 | struct se_session *se_sess, |
| 242 | void *fabric_sess_ptr) |
| 243 | { |
| 244 | unsigned char buf[PR_REG_ISID_LEN]; |
| 245 | |
| 246 | se_sess->se_tpg = se_tpg; |
| 247 | se_sess->fabric_sess_ptr = fabric_sess_ptr; |
| 248 | /* |
| 249 | * Used by struct se_node_acl's under ConfigFS to locate active se_session-t |
| 250 | * |
| 251 | * Only set for struct se_session's that will actually be moving I/O. |
| 252 | * eg: *NOT* discovery sessions. |
| 253 | */ |
| 254 | if (se_nacl) { |
| 255 | /* |
| 256 | * If the fabric module supports an ISID based TransportID, |
| 257 | * save this value in binary from the fabric I_T Nexus now. |
| 258 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 259 | if (se_tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 260 | memset(&buf[0], 0, PR_REG_ISID_LEN); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 261 | se_tpg->se_tpg_tfo->sess_get_initiator_sid(se_sess, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 262 | &buf[0], PR_REG_ISID_LEN); |
| 263 | se_sess->sess_bin_isid = get_unaligned_be64(&buf[0]); |
| 264 | } |
Nicholas Bellinger | afb999f | 2012-03-08 23:45:02 -0800 | [diff] [blame] | 265 | kref_get(&se_nacl->acl_kref); |
| 266 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 267 | spin_lock_irq(&se_nacl->nacl_sess_lock); |
| 268 | /* |
| 269 | * The se_nacl->nacl_sess pointer will be set to the |
| 270 | * last active I_T Nexus for each struct se_node_acl. |
| 271 | */ |
| 272 | se_nacl->nacl_sess = se_sess; |
| 273 | |
| 274 | list_add_tail(&se_sess->sess_acl_list, |
| 275 | &se_nacl->acl_sess_list); |
| 276 | spin_unlock_irq(&se_nacl->nacl_sess_lock); |
| 277 | } |
| 278 | list_add_tail(&se_sess->sess_list, &se_tpg->tpg_sess_list); |
| 279 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 280 | pr_debug("TARGET_CORE[%s]: Registered fabric_sess_ptr: %p\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 281 | 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] | 282 | } |
| 283 | EXPORT_SYMBOL(__transport_register_session); |
| 284 | |
| 285 | void transport_register_session( |
| 286 | struct se_portal_group *se_tpg, |
| 287 | struct se_node_acl *se_nacl, |
| 288 | struct se_session *se_sess, |
| 289 | void *fabric_sess_ptr) |
| 290 | { |
Nicholas Bellinger | 140854c | 2011-08-31 12:34:39 -0700 | [diff] [blame] | 291 | unsigned long flags; |
| 292 | |
| 293 | spin_lock_irqsave(&se_tpg->session_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 294 | __transport_register_session(se_tpg, se_nacl, se_sess, fabric_sess_ptr); |
Nicholas Bellinger | 140854c | 2011-08-31 12:34:39 -0700 | [diff] [blame] | 295 | spin_unlock_irqrestore(&se_tpg->session_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 296 | } |
| 297 | EXPORT_SYMBOL(transport_register_session); |
| 298 | |
Fengguang Wu | ecf0dd6 | 2012-10-10 07:30:20 +0800 | [diff] [blame] | 299 | static void target_release_session(struct kref *kref) |
Nicholas Bellinger | 41ac82b | 2012-02-26 22:22:10 -0800 | [diff] [blame] | 300 | { |
| 301 | struct se_session *se_sess = container_of(kref, |
| 302 | struct se_session, sess_kref); |
| 303 | struct se_portal_group *se_tpg = se_sess->se_tpg; |
| 304 | |
| 305 | se_tpg->se_tpg_tfo->close_session(se_sess); |
| 306 | } |
| 307 | |
| 308 | void target_get_session(struct se_session *se_sess) |
| 309 | { |
| 310 | kref_get(&se_sess->sess_kref); |
| 311 | } |
| 312 | EXPORT_SYMBOL(target_get_session); |
| 313 | |
Jörn Engel | 33933a0 | 2012-05-11 10:35:08 -0400 | [diff] [blame] | 314 | void target_put_session(struct se_session *se_sess) |
Nicholas Bellinger | 41ac82b | 2012-02-26 22:22:10 -0800 | [diff] [blame] | 315 | { |
Joern Engel | 4149268 | 2012-05-18 13:57:19 -0700 | [diff] [blame] | 316 | struct se_portal_group *tpg = se_sess->se_tpg; |
| 317 | |
| 318 | if (tpg->se_tpg_tfo->put_session != NULL) { |
| 319 | tpg->se_tpg_tfo->put_session(se_sess); |
| 320 | return; |
| 321 | } |
Jörn Engel | 33933a0 | 2012-05-11 10:35:08 -0400 | [diff] [blame] | 322 | kref_put(&se_sess->sess_kref, target_release_session); |
Nicholas Bellinger | 41ac82b | 2012-02-26 22:22:10 -0800 | [diff] [blame] | 323 | } |
| 324 | EXPORT_SYMBOL(target_put_session); |
| 325 | |
Nicholas Bellinger | afb999f | 2012-03-08 23:45:02 -0800 | [diff] [blame] | 326 | static void target_complete_nacl(struct kref *kref) |
| 327 | { |
| 328 | struct se_node_acl *nacl = container_of(kref, |
| 329 | struct se_node_acl, acl_kref); |
| 330 | |
| 331 | complete(&nacl->acl_free_comp); |
| 332 | } |
| 333 | |
| 334 | void target_put_nacl(struct se_node_acl *nacl) |
| 335 | { |
| 336 | kref_put(&nacl->acl_kref, target_complete_nacl); |
| 337 | } |
| 338 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 339 | void transport_deregister_session_configfs(struct se_session *se_sess) |
| 340 | { |
| 341 | struct se_node_acl *se_nacl; |
Roland Dreier | 2338886 | 2011-06-22 01:02:21 -0700 | [diff] [blame] | 342 | unsigned long flags; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 343 | /* |
| 344 | * Used by struct se_node_acl's under ConfigFS to locate active struct se_session |
| 345 | */ |
| 346 | se_nacl = se_sess->se_node_acl; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 347 | if (se_nacl) { |
Roland Dreier | 2338886 | 2011-06-22 01:02:21 -0700 | [diff] [blame] | 348 | spin_lock_irqsave(&se_nacl->nacl_sess_lock, flags); |
Nicholas Bellinger | 337c060 | 2012-03-10 14:36:21 -0800 | [diff] [blame] | 349 | if (se_nacl->acl_stop == 0) |
| 350 | list_del(&se_sess->sess_acl_list); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 351 | /* |
| 352 | * If the session list is empty, then clear the pointer. |
| 353 | * Otherwise, set the struct se_session pointer from the tail |
| 354 | * element of the per struct se_node_acl active session list. |
| 355 | */ |
| 356 | if (list_empty(&se_nacl->acl_sess_list)) |
| 357 | se_nacl->nacl_sess = NULL; |
| 358 | else { |
| 359 | se_nacl->nacl_sess = container_of( |
| 360 | se_nacl->acl_sess_list.prev, |
| 361 | struct se_session, sess_acl_list); |
| 362 | } |
Roland Dreier | 2338886 | 2011-06-22 01:02:21 -0700 | [diff] [blame] | 363 | spin_unlock_irqrestore(&se_nacl->nacl_sess_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 364 | } |
| 365 | } |
| 366 | EXPORT_SYMBOL(transport_deregister_session_configfs); |
| 367 | |
| 368 | void transport_free_session(struct se_session *se_sess) |
| 369 | { |
| 370 | kmem_cache_free(se_sess_cache, se_sess); |
| 371 | } |
| 372 | EXPORT_SYMBOL(transport_free_session); |
| 373 | |
| 374 | void transport_deregister_session(struct se_session *se_sess) |
| 375 | { |
| 376 | struct se_portal_group *se_tpg = se_sess->se_tpg; |
Nicholas Bellinger | 0146834 | 2012-03-10 14:32:52 -0800 | [diff] [blame] | 377 | struct target_core_fabric_ops *se_tfo; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 378 | struct se_node_acl *se_nacl; |
Roland Dreier | e63a8e1 | 2011-08-12 16:01:02 -0700 | [diff] [blame] | 379 | unsigned long flags; |
Nicholas Bellinger | 0146834 | 2012-03-10 14:32:52 -0800 | [diff] [blame] | 380 | bool comp_nacl = true; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 381 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 382 | if (!se_tpg) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 383 | transport_free_session(se_sess); |
| 384 | return; |
| 385 | } |
Nicholas Bellinger | 0146834 | 2012-03-10 14:32:52 -0800 | [diff] [blame] | 386 | se_tfo = se_tpg->se_tpg_tfo; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 387 | |
Roland Dreier | e63a8e1 | 2011-08-12 16:01:02 -0700 | [diff] [blame] | 388 | spin_lock_irqsave(&se_tpg->session_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 389 | list_del(&se_sess->sess_list); |
| 390 | se_sess->se_tpg = NULL; |
| 391 | se_sess->fabric_sess_ptr = NULL; |
Roland Dreier | e63a8e1 | 2011-08-12 16:01:02 -0700 | [diff] [blame] | 392 | spin_unlock_irqrestore(&se_tpg->session_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 393 | |
| 394 | /* |
| 395 | * Determine if we need to do extra work for this initiator node's |
| 396 | * struct se_node_acl if it had been previously dynamically generated. |
| 397 | */ |
| 398 | se_nacl = se_sess->se_node_acl; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 399 | |
Nicholas Bellinger | 0146834 | 2012-03-10 14:32:52 -0800 | [diff] [blame] | 400 | spin_lock_irqsave(&se_tpg->acl_node_lock, flags); |
| 401 | if (se_nacl && se_nacl->dynamic_node_acl) { |
| 402 | if (!se_tfo->tpg_check_demo_mode_cache(se_tpg)) { |
| 403 | list_del(&se_nacl->acl_list); |
| 404 | se_tpg->num_node_acls--; |
| 405 | spin_unlock_irqrestore(&se_tpg->acl_node_lock, flags); |
| 406 | core_tpg_wait_for_nacl_pr_ref(se_nacl); |
| 407 | core_free_device_list_for_node(se_nacl, se_tpg); |
| 408 | se_tfo->tpg_release_fabric_acl(se_tpg, se_nacl); |
| 409 | |
| 410 | comp_nacl = false; |
| 411 | spin_lock_irqsave(&se_tpg->acl_node_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 412 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 413 | } |
Nicholas Bellinger | 0146834 | 2012-03-10 14:32:52 -0800 | [diff] [blame] | 414 | spin_unlock_irqrestore(&se_tpg->acl_node_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 415 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 416 | pr_debug("TARGET_CORE[%s]: Deregistered fabric_sess\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 417 | se_tpg->se_tpg_tfo->get_fabric_name()); |
Nicholas Bellinger | 0146834 | 2012-03-10 14:32:52 -0800 | [diff] [blame] | 418 | /* |
Nicholas Bellinger | afb999f | 2012-03-08 23:45:02 -0800 | [diff] [blame] | 419 | * If last kref is dropping now for an explict NodeACL, awake sleeping |
| 420 | * ->acl_free_comp caller to wakeup configfs se_node_acl->acl_group |
| 421 | * removal context. |
Nicholas Bellinger | 0146834 | 2012-03-10 14:32:52 -0800 | [diff] [blame] | 422 | */ |
| 423 | if (se_nacl && comp_nacl == true) |
Nicholas Bellinger | afb999f | 2012-03-08 23:45:02 -0800 | [diff] [blame] | 424 | target_put_nacl(se_nacl); |
Nicholas Bellinger | 0146834 | 2012-03-10 14:32:52 -0800 | [diff] [blame] | 425 | |
Nicholas Bellinger | afb999f | 2012-03-08 23:45:02 -0800 | [diff] [blame] | 426 | transport_free_session(se_sess); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 427 | } |
| 428 | EXPORT_SYMBOL(transport_deregister_session); |
| 429 | |
| 430 | /* |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 431 | * Called with cmd->t_state_lock held. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 432 | */ |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 433 | static void target_remove_from_state_list(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 434 | { |
Christoph Hellwig | 42bf829 | 2011-10-12 11:07:00 -0400 | [diff] [blame] | 435 | struct se_device *dev = cmd->se_dev; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 436 | unsigned long flags; |
| 437 | |
Christoph Hellwig | 42bf829 | 2011-10-12 11:07:00 -0400 | [diff] [blame] | 438 | if (!dev) |
| 439 | return; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 440 | |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 441 | if (cmd->transport_state & CMD_T_BUSY) |
| 442 | return; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 443 | |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 444 | spin_lock_irqsave(&dev->execute_task_lock, flags); |
| 445 | if (cmd->state_active) { |
| 446 | list_del(&cmd->state_list); |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 447 | cmd->state_active = false; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 448 | } |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 449 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 450 | } |
| 451 | |
Christoph Hellwig | f7113a4 | 2012-07-08 15:58:38 -0400 | [diff] [blame] | 452 | static int transport_cmd_check_stop(struct se_cmd *cmd, bool remove_from_lists) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 453 | { |
| 454 | unsigned long flags; |
| 455 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 456 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 457 | /* |
| 458 | * Determine if IOCTL context caller in requesting the stopping of this |
| 459 | * command for LUN shutdown purposes. |
| 460 | */ |
Christoph Hellwig | 7d680f3 | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 461 | if (cmd->transport_state & CMD_T_LUN_STOP) { |
| 462 | pr_debug("%s:%d CMD_T_LUN_STOP for ITT: 0x%08x\n", |
| 463 | __func__, __LINE__, cmd->se_tfo->get_task_tag(cmd)); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 464 | |
Christoph Hellwig | 7d680f3 | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 465 | cmd->transport_state &= ~CMD_T_ACTIVE; |
Christoph Hellwig | f7113a4 | 2012-07-08 15:58:38 -0400 | [diff] [blame] | 466 | if (remove_from_lists) |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 467 | target_remove_from_state_list(cmd); |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 468 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 469 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 470 | complete(&cmd->transport_lun_stop_comp); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 471 | return 1; |
| 472 | } |
Christoph Hellwig | f7113a4 | 2012-07-08 15:58:38 -0400 | [diff] [blame] | 473 | |
| 474 | if (remove_from_lists) { |
| 475 | target_remove_from_state_list(cmd); |
| 476 | |
| 477 | /* |
| 478 | * Clear struct se_cmd->se_lun before the handoff to FE. |
| 479 | */ |
| 480 | cmd->se_lun = NULL; |
| 481 | } |
| 482 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 483 | /* |
| 484 | * Determine if frontend context caller is requesting the stopping of |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 485 | * this command for frontend exceptions. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 486 | */ |
Christoph Hellwig | 7d680f3 | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 487 | if (cmd->transport_state & CMD_T_STOP) { |
| 488 | pr_debug("%s:%d CMD_T_STOP for ITT: 0x%08x\n", |
| 489 | __func__, __LINE__, |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 490 | cmd->se_tfo->get_task_tag(cmd)); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 491 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 492 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 493 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 494 | complete(&cmd->t_transport_stop_comp); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 495 | return 1; |
| 496 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 497 | |
Christoph Hellwig | f7113a4 | 2012-07-08 15:58:38 -0400 | [diff] [blame] | 498 | cmd->transport_state &= ~CMD_T_ACTIVE; |
| 499 | if (remove_from_lists) { |
| 500 | /* |
| 501 | * Some fabric modules like tcm_loop can release |
| 502 | * their internally allocated I/O reference now and |
| 503 | * struct se_cmd now. |
| 504 | * |
| 505 | * Fabric modules are expected to return '1' here if the |
| 506 | * se_cmd being passed is released at this point, |
| 507 | * or zero if not being released. |
| 508 | */ |
| 509 | if (cmd->se_tfo->check_stop_free != NULL) { |
| 510 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
| 511 | return cmd->se_tfo->check_stop_free(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 512 | } |
Christoph Hellwig | f7113a4 | 2012-07-08 15:58:38 -0400 | [diff] [blame] | 513 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 514 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 515 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 516 | return 0; |
| 517 | } |
| 518 | |
| 519 | static int transport_cmd_check_stop_to_fabric(struct se_cmd *cmd) |
| 520 | { |
Christoph Hellwig | f7113a4 | 2012-07-08 15:58:38 -0400 | [diff] [blame] | 521 | return transport_cmd_check_stop(cmd, true); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 522 | } |
| 523 | |
| 524 | static void transport_lun_remove_cmd(struct se_cmd *cmd) |
| 525 | { |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 526 | struct se_lun *lun = cmd->se_lun; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 527 | unsigned long flags; |
| 528 | |
| 529 | if (!lun) |
| 530 | return; |
| 531 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 532 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
Christoph Hellwig | 7d680f3 | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 533 | if (cmd->transport_state & CMD_T_DEV_ACTIVE) { |
| 534 | cmd->transport_state &= ~CMD_T_DEV_ACTIVE; |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 535 | target_remove_from_state_list(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 536 | } |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 537 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 538 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 539 | spin_lock_irqsave(&lun->lun_cmd_lock, flags); |
Christoph Hellwig | 3d26fea | 2011-12-21 14:14:05 -0500 | [diff] [blame] | 540 | if (!list_empty(&cmd->se_lun_node)) |
| 541 | list_del_init(&cmd->se_lun_node); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 542 | spin_unlock_irqrestore(&lun->lun_cmd_lock, flags); |
| 543 | } |
| 544 | |
| 545 | void transport_cmd_finish_abort(struct se_cmd *cmd, int remove) |
| 546 | { |
Andy Grover | c8e31f2 | 2012-01-19 13:39:17 -0800 | [diff] [blame] | 547 | if (!(cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) |
Nicholas Bellinger | 8dc52b5 | 2011-10-09 02:02:51 -0700 | [diff] [blame] | 548 | transport_lun_remove_cmd(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 549 | |
| 550 | if (transport_cmd_check_stop_to_fabric(cmd)) |
| 551 | return; |
Christoph Hellwig | af87729 | 2012-07-08 15:58:49 -0400 | [diff] [blame] | 552 | if (remove) |
Christoph Hellwig | e6a2573 | 2011-09-13 23:08:50 +0200 | [diff] [blame] | 553 | transport_put_cmd(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 554 | } |
| 555 | |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 556 | static void target_complete_failure_work(struct work_struct *work) |
| 557 | { |
| 558 | struct se_cmd *cmd = container_of(work, struct se_cmd, work); |
| 559 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 560 | transport_generic_request_failure(cmd, |
| 561 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE); |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 562 | } |
| 563 | |
Paolo Bonzini | 6138ed2 | 2012-09-05 17:09:13 +0200 | [diff] [blame] | 564 | /* |
Paolo Bonzini | d5829ea | 2012-09-05 17:09:15 +0200 | [diff] [blame] | 565 | * Used when asking transport to copy Sense Data from the underlying |
| 566 | * Linux/SCSI struct scsi_cmnd |
Paolo Bonzini | 6138ed2 | 2012-09-05 17:09:13 +0200 | [diff] [blame] | 567 | */ |
Paolo Bonzini | d5829ea | 2012-09-05 17:09:15 +0200 | [diff] [blame] | 568 | static unsigned char *transport_get_sense_buffer(struct se_cmd *cmd) |
Paolo Bonzini | 6138ed2 | 2012-09-05 17:09:13 +0200 | [diff] [blame] | 569 | { |
Paolo Bonzini | 6138ed2 | 2012-09-05 17:09:13 +0200 | [diff] [blame] | 570 | struct se_device *dev = cmd->se_dev; |
Paolo Bonzini | 6138ed2 | 2012-09-05 17:09:13 +0200 | [diff] [blame] | 571 | |
| 572 | WARN_ON(!cmd->se_lun); |
| 573 | |
| 574 | if (!dev) |
Paolo Bonzini | d5829ea | 2012-09-05 17:09:15 +0200 | [diff] [blame] | 575 | return NULL; |
Paolo Bonzini | 6138ed2 | 2012-09-05 17:09:13 +0200 | [diff] [blame] | 576 | |
Paolo Bonzini | d5829ea | 2012-09-05 17:09:15 +0200 | [diff] [blame] | 577 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) |
| 578 | return NULL; |
Paolo Bonzini | 6138ed2 | 2012-09-05 17:09:13 +0200 | [diff] [blame] | 579 | |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 580 | cmd->scsi_sense_length = TRANSPORT_SENSE_BUFFER; |
Paolo Bonzini | 6138ed2 | 2012-09-05 17:09:13 +0200 | [diff] [blame] | 581 | |
Paolo Bonzini | d5829ea | 2012-09-05 17:09:15 +0200 | [diff] [blame] | 582 | 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] | 583 | dev->se_hba->hba_id, dev->transport->name, cmd->scsi_status); |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 584 | return cmd->sense_buffer; |
Paolo Bonzini | 6138ed2 | 2012-09-05 17:09:13 +0200 | [diff] [blame] | 585 | } |
| 586 | |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 587 | void target_complete_cmd(struct se_cmd *cmd, u8 scsi_status) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 588 | { |
Christoph Hellwig | 42bf829 | 2011-10-12 11:07:00 -0400 | [diff] [blame] | 589 | struct se_device *dev = cmd->se_dev; |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 590 | int success = scsi_status == GOOD; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 591 | unsigned long flags; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 592 | |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 593 | cmd->scsi_status = scsi_status; |
| 594 | |
| 595 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 596 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 597 | cmd->transport_state &= ~CMD_T_BUSY; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 598 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 599 | if (dev && dev->transport->transport_complete) { |
Paolo Bonzini | d5829ea | 2012-09-05 17:09:15 +0200 | [diff] [blame] | 600 | dev->transport->transport_complete(cmd, |
| 601 | cmd->t_data_sg, |
| 602 | transport_get_sense_buffer(cmd)); |
| 603 | if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 604 | success = 1; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 605 | } |
| 606 | |
| 607 | /* |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 608 | * See if we are waiting to complete for an exception condition. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 609 | */ |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 610 | if (cmd->transport_state & CMD_T_REQUEST_STOP) { |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 611 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 612 | complete(&cmd->task_stop_comp); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 613 | return; |
| 614 | } |
Christoph Hellwig | 2235007 | 2011-11-02 05:06:35 -0700 | [diff] [blame] | 615 | |
| 616 | if (!success) |
Christoph Hellwig | 7d680f3 | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 617 | cmd->transport_state |= CMD_T_FAILED; |
Christoph Hellwig | 2235007 | 2011-11-02 05:06:35 -0700 | [diff] [blame] | 618 | |
Nicholas Bellinger | 3d28934 | 2012-02-13 02:38:14 -0800 | [diff] [blame] | 619 | /* |
| 620 | * Check for case where an explict ABORT_TASK has been received |
| 621 | * and transport_wait_for_tasks() will be waiting for completion.. |
| 622 | */ |
| 623 | if (cmd->transport_state & CMD_T_ABORTED && |
| 624 | cmd->transport_state & CMD_T_STOP) { |
| 625 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
| 626 | complete(&cmd->t_transport_stop_comp); |
| 627 | return; |
| 628 | } else if (cmd->transport_state & CMD_T_FAILED) { |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 629 | INIT_WORK(&cmd->work, target_complete_failure_work); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 630 | } else { |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 631 | INIT_WORK(&cmd->work, target_complete_ok_work); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 632 | } |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 633 | |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 634 | cmd->t_state = TRANSPORT_COMPLETE; |
Nicholas Bellinger | 3d28934 | 2012-02-13 02:38:14 -0800 | [diff] [blame] | 635 | cmd->transport_state |= (CMD_T_COMPLETE | CMD_T_ACTIVE); |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 636 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 637 | |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 638 | queue_work(target_completion_wq, &cmd->work); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 639 | } |
Christoph Hellwig | 6bb35e0 | 2012-04-23 11:35:33 -0400 | [diff] [blame] | 640 | EXPORT_SYMBOL(target_complete_cmd); |
| 641 | |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 642 | static void target_add_to_state_list(struct se_cmd *cmd) |
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; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 645 | unsigned long flags; |
| 646 | |
Nicholas Bellinger | 4d2300c | 2011-11-30 18:18:33 -0800 | [diff] [blame] | 647 | spin_lock_irqsave(&dev->execute_task_lock, flags); |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 648 | if (!cmd->state_active) { |
| 649 | list_add_tail(&cmd->state_list, &dev->state_list); |
| 650 | cmd->state_active = true; |
| 651 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 652 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 653 | } |
| 654 | |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 655 | /* |
Nicholas Bellinger | f147abb | 2011-10-25 23:57:41 -0700 | [diff] [blame] | 656 | * Handle QUEUE_FULL / -EAGAIN and -ENOMEM status |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 657 | */ |
Christoph Hellwig | 7a6f0a1 | 2012-07-08 15:58:47 -0400 | [diff] [blame] | 658 | static void transport_write_pending_qf(struct se_cmd *cmd); |
| 659 | static void transport_complete_qf(struct se_cmd *cmd); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 660 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 661 | void target_qf_do_work(struct work_struct *work) |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 662 | { |
| 663 | struct se_device *dev = container_of(work, struct se_device, |
| 664 | qf_work_queue); |
Roland Dreier | bcac364 | 2011-08-27 21:33:16 -0700 | [diff] [blame] | 665 | LIST_HEAD(qf_cmd_list); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 666 | struct se_cmd *cmd, *cmd_tmp; |
| 667 | |
| 668 | spin_lock_irq(&dev->qf_cmd_lock); |
Roland Dreier | bcac364 | 2011-08-27 21:33:16 -0700 | [diff] [blame] | 669 | list_splice_init(&dev->qf_cmd_list, &qf_cmd_list); |
| 670 | spin_unlock_irq(&dev->qf_cmd_lock); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 671 | |
Roland Dreier | bcac364 | 2011-08-27 21:33:16 -0700 | [diff] [blame] | 672 | 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] | 673 | list_del(&cmd->se_qf_node); |
| 674 | atomic_dec(&dev->dev_qf_count); |
| 675 | smp_mb__after_atomic_dec(); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 676 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 677 | pr_debug("Processing %s cmd: %p QUEUE_FULL in work queue" |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 678 | " context: %s\n", cmd->se_tfo->get_fabric_name(), cmd, |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 679 | (cmd->t_state == TRANSPORT_COMPLETE_QF_OK) ? "COMPLETE_OK" : |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 680 | (cmd->t_state == TRANSPORT_COMPLETE_QF_WP) ? "WRITE_PENDING" |
| 681 | : "UNKNOWN"); |
Christoph Hellwig | f7a5cc0 | 2011-10-17 13:56:42 -0400 | [diff] [blame] | 682 | |
Christoph Hellwig | 7a6f0a1 | 2012-07-08 15:58:47 -0400 | [diff] [blame] | 683 | if (cmd->t_state == TRANSPORT_COMPLETE_QF_WP) |
| 684 | transport_write_pending_qf(cmd); |
| 685 | else if (cmd->t_state == TRANSPORT_COMPLETE_QF_OK) |
| 686 | transport_complete_qf(cmd); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 687 | } |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 688 | } |
| 689 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 690 | unsigned char *transport_dump_cmd_direction(struct se_cmd *cmd) |
| 691 | { |
| 692 | switch (cmd->data_direction) { |
| 693 | case DMA_NONE: |
| 694 | return "NONE"; |
| 695 | case DMA_FROM_DEVICE: |
| 696 | return "READ"; |
| 697 | case DMA_TO_DEVICE: |
| 698 | return "WRITE"; |
| 699 | case DMA_BIDIRECTIONAL: |
| 700 | return "BIDI"; |
| 701 | default: |
| 702 | break; |
| 703 | } |
| 704 | |
| 705 | return "UNKNOWN"; |
| 706 | } |
| 707 | |
| 708 | void transport_dump_dev_state( |
| 709 | struct se_device *dev, |
| 710 | char *b, |
| 711 | int *bl) |
| 712 | { |
| 713 | *bl += sprintf(b + *bl, "Status: "); |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 714 | if (dev->export_count) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 715 | *bl += sprintf(b + *bl, "ACTIVATED"); |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 716 | else |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 717 | *bl += sprintf(b + *bl, "DEACTIVATED"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 718 | |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 719 | *bl += sprintf(b + *bl, " Max Queue Depth: %d", dev->queue_depth); |
Nicholas Bellinger | 11e764b | 2012-05-09 12:42:09 -0700 | [diff] [blame] | 720 | *bl += sprintf(b + *bl, " SectorSize: %u HwMaxSectors: %u\n", |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 721 | dev->dev_attrib.block_size, |
| 722 | dev->dev_attrib.hw_max_sectors); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 723 | *bl += sprintf(b + *bl, " "); |
| 724 | } |
| 725 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 726 | void transport_dump_vpd_proto_id( |
| 727 | struct t10_vpd *vpd, |
| 728 | unsigned char *p_buf, |
| 729 | int p_buf_len) |
| 730 | { |
| 731 | unsigned char buf[VPD_TMP_BUF_SIZE]; |
| 732 | int len; |
| 733 | |
| 734 | memset(buf, 0, VPD_TMP_BUF_SIZE); |
| 735 | len = sprintf(buf, "T10 VPD Protocol Identifier: "); |
| 736 | |
| 737 | switch (vpd->protocol_identifier) { |
| 738 | case 0x00: |
| 739 | sprintf(buf+len, "Fibre Channel\n"); |
| 740 | break; |
| 741 | case 0x10: |
| 742 | sprintf(buf+len, "Parallel SCSI\n"); |
| 743 | break; |
| 744 | case 0x20: |
| 745 | sprintf(buf+len, "SSA\n"); |
| 746 | break; |
| 747 | case 0x30: |
| 748 | sprintf(buf+len, "IEEE 1394\n"); |
| 749 | break; |
| 750 | case 0x40: |
| 751 | sprintf(buf+len, "SCSI Remote Direct Memory Access" |
| 752 | " Protocol\n"); |
| 753 | break; |
| 754 | case 0x50: |
| 755 | sprintf(buf+len, "Internet SCSI (iSCSI)\n"); |
| 756 | break; |
| 757 | case 0x60: |
| 758 | sprintf(buf+len, "SAS Serial SCSI Protocol\n"); |
| 759 | break; |
| 760 | case 0x70: |
| 761 | sprintf(buf+len, "Automation/Drive Interface Transport" |
| 762 | " Protocol\n"); |
| 763 | break; |
| 764 | case 0x80: |
| 765 | sprintf(buf+len, "AT Attachment Interface ATA/ATAPI\n"); |
| 766 | break; |
| 767 | default: |
| 768 | sprintf(buf+len, "Unknown 0x%02x\n", |
| 769 | vpd->protocol_identifier); |
| 770 | break; |
| 771 | } |
| 772 | |
| 773 | if (p_buf) |
| 774 | strncpy(p_buf, buf, p_buf_len); |
| 775 | else |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 776 | pr_debug("%s", buf); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 777 | } |
| 778 | |
| 779 | void |
| 780 | transport_set_vpd_proto_id(struct t10_vpd *vpd, unsigned char *page_83) |
| 781 | { |
| 782 | /* |
| 783 | * Check if the Protocol Identifier Valid (PIV) bit is set.. |
| 784 | * |
| 785 | * from spc3r23.pdf section 7.5.1 |
| 786 | */ |
| 787 | if (page_83[1] & 0x80) { |
| 788 | vpd->protocol_identifier = (page_83[0] & 0xf0); |
| 789 | vpd->protocol_identifier_set = 1; |
| 790 | transport_dump_vpd_proto_id(vpd, NULL, 0); |
| 791 | } |
| 792 | } |
| 793 | EXPORT_SYMBOL(transport_set_vpd_proto_id); |
| 794 | |
| 795 | int transport_dump_vpd_assoc( |
| 796 | struct t10_vpd *vpd, |
| 797 | unsigned char *p_buf, |
| 798 | int p_buf_len) |
| 799 | { |
| 800 | unsigned char buf[VPD_TMP_BUF_SIZE]; |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 801 | int ret = 0; |
| 802 | int len; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 803 | |
| 804 | memset(buf, 0, VPD_TMP_BUF_SIZE); |
| 805 | len = sprintf(buf, "T10 VPD Identifier Association: "); |
| 806 | |
| 807 | switch (vpd->association) { |
| 808 | case 0x00: |
| 809 | sprintf(buf+len, "addressed logical unit\n"); |
| 810 | break; |
| 811 | case 0x10: |
| 812 | sprintf(buf+len, "target port\n"); |
| 813 | break; |
| 814 | case 0x20: |
| 815 | sprintf(buf+len, "SCSI target device\n"); |
| 816 | break; |
| 817 | default: |
| 818 | sprintf(buf+len, "Unknown 0x%02x\n", vpd->association); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 819 | ret = -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 820 | break; |
| 821 | } |
| 822 | |
| 823 | if (p_buf) |
| 824 | strncpy(p_buf, buf, p_buf_len); |
| 825 | else |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 826 | pr_debug("%s", buf); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 827 | |
| 828 | return ret; |
| 829 | } |
| 830 | |
| 831 | int transport_set_vpd_assoc(struct t10_vpd *vpd, unsigned char *page_83) |
| 832 | { |
| 833 | /* |
| 834 | * The VPD identification association.. |
| 835 | * |
| 836 | * from spc3r23.pdf Section 7.6.3.1 Table 297 |
| 837 | */ |
| 838 | vpd->association = (page_83[1] & 0x30); |
| 839 | return transport_dump_vpd_assoc(vpd, NULL, 0); |
| 840 | } |
| 841 | EXPORT_SYMBOL(transport_set_vpd_assoc); |
| 842 | |
| 843 | int transport_dump_vpd_ident_type( |
| 844 | struct t10_vpd *vpd, |
| 845 | unsigned char *p_buf, |
| 846 | int p_buf_len) |
| 847 | { |
| 848 | unsigned char buf[VPD_TMP_BUF_SIZE]; |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 849 | int ret = 0; |
| 850 | int len; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 851 | |
| 852 | memset(buf, 0, VPD_TMP_BUF_SIZE); |
| 853 | len = sprintf(buf, "T10 VPD Identifier Type: "); |
| 854 | |
| 855 | switch (vpd->device_identifier_type) { |
| 856 | case 0x00: |
| 857 | sprintf(buf+len, "Vendor specific\n"); |
| 858 | break; |
| 859 | case 0x01: |
| 860 | sprintf(buf+len, "T10 Vendor ID based\n"); |
| 861 | break; |
| 862 | case 0x02: |
| 863 | sprintf(buf+len, "EUI-64 based\n"); |
| 864 | break; |
| 865 | case 0x03: |
| 866 | sprintf(buf+len, "NAA\n"); |
| 867 | break; |
| 868 | case 0x04: |
| 869 | sprintf(buf+len, "Relative target port identifier\n"); |
| 870 | break; |
| 871 | case 0x08: |
| 872 | sprintf(buf+len, "SCSI name string\n"); |
| 873 | break; |
| 874 | default: |
| 875 | sprintf(buf+len, "Unsupported: 0x%02x\n", |
| 876 | vpd->device_identifier_type); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 877 | ret = -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 878 | break; |
| 879 | } |
| 880 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 881 | if (p_buf) { |
| 882 | if (p_buf_len < strlen(buf)+1) |
| 883 | return -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 884 | strncpy(p_buf, buf, p_buf_len); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 885 | } else { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 886 | pr_debug("%s", buf); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 887 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 888 | |
| 889 | return ret; |
| 890 | } |
| 891 | |
| 892 | int transport_set_vpd_ident_type(struct t10_vpd *vpd, unsigned char *page_83) |
| 893 | { |
| 894 | /* |
| 895 | * The VPD identifier type.. |
| 896 | * |
| 897 | * from spc3r23.pdf Section 7.6.3.1 Table 298 |
| 898 | */ |
| 899 | vpd->device_identifier_type = (page_83[1] & 0x0f); |
| 900 | return transport_dump_vpd_ident_type(vpd, NULL, 0); |
| 901 | } |
| 902 | EXPORT_SYMBOL(transport_set_vpd_ident_type); |
| 903 | |
| 904 | int transport_dump_vpd_ident( |
| 905 | struct t10_vpd *vpd, |
| 906 | unsigned char *p_buf, |
| 907 | int p_buf_len) |
| 908 | { |
| 909 | unsigned char buf[VPD_TMP_BUF_SIZE]; |
| 910 | int ret = 0; |
| 911 | |
| 912 | memset(buf, 0, VPD_TMP_BUF_SIZE); |
| 913 | |
| 914 | switch (vpd->device_identifier_code_set) { |
| 915 | case 0x01: /* Binary */ |
| 916 | sprintf(buf, "T10 VPD Binary Device Identifier: %s\n", |
| 917 | &vpd->device_identifier[0]); |
| 918 | break; |
| 919 | case 0x02: /* ASCII */ |
| 920 | sprintf(buf, "T10 VPD ASCII Device Identifier: %s\n", |
| 921 | &vpd->device_identifier[0]); |
| 922 | break; |
| 923 | case 0x03: /* UTF-8 */ |
| 924 | sprintf(buf, "T10 VPD UTF-8 Device Identifier: %s\n", |
| 925 | &vpd->device_identifier[0]); |
| 926 | break; |
| 927 | default: |
| 928 | sprintf(buf, "T10 VPD Device Identifier encoding unsupported:" |
| 929 | " 0x%02x", vpd->device_identifier_code_set); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 930 | ret = -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 931 | break; |
| 932 | } |
| 933 | |
| 934 | if (p_buf) |
| 935 | strncpy(p_buf, buf, p_buf_len); |
| 936 | else |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 937 | pr_debug("%s", buf); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 938 | |
| 939 | return ret; |
| 940 | } |
| 941 | |
| 942 | int |
| 943 | transport_set_vpd_ident(struct t10_vpd *vpd, unsigned char *page_83) |
| 944 | { |
| 945 | static const char hex_str[] = "0123456789abcdef"; |
Masanari Iida | 35d1efe | 2012-08-16 22:43:13 +0900 | [diff] [blame] | 946 | int j = 0, i = 4; /* offset to start of the identifier */ |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 947 | |
| 948 | /* |
| 949 | * The VPD Code Set (encoding) |
| 950 | * |
| 951 | * from spc3r23.pdf Section 7.6.3.1 Table 296 |
| 952 | */ |
| 953 | vpd->device_identifier_code_set = (page_83[0] & 0x0f); |
| 954 | switch (vpd->device_identifier_code_set) { |
| 955 | case 0x01: /* Binary */ |
| 956 | vpd->device_identifier[j++] = |
| 957 | hex_str[vpd->device_identifier_type]; |
| 958 | while (i < (4 + page_83[3])) { |
| 959 | vpd->device_identifier[j++] = |
| 960 | hex_str[(page_83[i] & 0xf0) >> 4]; |
| 961 | vpd->device_identifier[j++] = |
| 962 | hex_str[page_83[i] & 0x0f]; |
| 963 | i++; |
| 964 | } |
| 965 | break; |
| 966 | case 0x02: /* ASCII */ |
| 967 | case 0x03: /* UTF-8 */ |
| 968 | while (i < (4 + page_83[3])) |
| 969 | vpd->device_identifier[j++] = page_83[i++]; |
| 970 | break; |
| 971 | default: |
| 972 | break; |
| 973 | } |
| 974 | |
| 975 | return transport_dump_vpd_ident(vpd, NULL, 0); |
| 976 | } |
| 977 | EXPORT_SYMBOL(transport_set_vpd_ident); |
| 978 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 979 | sense_reason_t |
| 980 | target_cmd_size_check(struct se_cmd *cmd, unsigned int size) |
Christoph Hellwig | 9b3b804 | 2012-05-20 11:59:12 -0400 | [diff] [blame] | 981 | { |
| 982 | struct se_device *dev = cmd->se_dev; |
| 983 | |
| 984 | if (cmd->unknown_data_length) { |
| 985 | cmd->data_length = size; |
| 986 | } else if (size != cmd->data_length) { |
| 987 | pr_warn("TARGET_CORE[%s]: Expected Transfer Length:" |
| 988 | " %u does not match SCSI CDB Length: %u for SAM Opcode:" |
| 989 | " 0x%02x\n", cmd->se_tfo->get_fabric_name(), |
| 990 | cmd->data_length, size, cmd->t_task_cdb[0]); |
| 991 | |
Christoph Hellwig | 9b3b804 | 2012-05-20 11:59:12 -0400 | [diff] [blame] | 992 | if (cmd->data_direction == DMA_TO_DEVICE) { |
| 993 | pr_err("Rejecting underflow/overflow" |
| 994 | " WRITE data\n"); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 995 | return TCM_INVALID_CDB_FIELD; |
Christoph Hellwig | 9b3b804 | 2012-05-20 11:59:12 -0400 | [diff] [blame] | 996 | } |
| 997 | /* |
| 998 | * Reject READ_* or WRITE_* with overflow/underflow for |
| 999 | * type SCF_SCSI_DATA_CDB. |
| 1000 | */ |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1001 | if (dev->dev_attrib.block_size != 512) { |
Christoph Hellwig | 9b3b804 | 2012-05-20 11:59:12 -0400 | [diff] [blame] | 1002 | pr_err("Failing OVERFLOW/UNDERFLOW for LBA op" |
| 1003 | " CDB on non 512-byte sector setup subsystem" |
| 1004 | " plugin: %s\n", dev->transport->name); |
| 1005 | /* Returns CHECK_CONDITION + INVALID_CDB_FIELD */ |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1006 | return TCM_INVALID_CDB_FIELD; |
Christoph Hellwig | 9b3b804 | 2012-05-20 11:59:12 -0400 | [diff] [blame] | 1007 | } |
Nicholas Bellinger | 4c054ba | 2012-08-16 15:33:10 -0700 | [diff] [blame] | 1008 | /* |
| 1009 | * For the overflow case keep the existing fabric provided |
| 1010 | * ->data_length. Otherwise for the underflow case, reset |
| 1011 | * ->data_length to the smaller SCSI expected data transfer |
| 1012 | * length. |
| 1013 | */ |
Christoph Hellwig | 9b3b804 | 2012-05-20 11:59:12 -0400 | [diff] [blame] | 1014 | if (size > cmd->data_length) { |
| 1015 | cmd->se_cmd_flags |= SCF_OVERFLOW_BIT; |
| 1016 | cmd->residual_count = (size - cmd->data_length); |
| 1017 | } else { |
| 1018 | cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT; |
| 1019 | cmd->residual_count = (cmd->data_length - size); |
Nicholas Bellinger | 4c054ba | 2012-08-16 15:33:10 -0700 | [diff] [blame] | 1020 | cmd->data_length = size; |
Christoph Hellwig | 9b3b804 | 2012-05-20 11:59:12 -0400 | [diff] [blame] | 1021 | } |
Christoph Hellwig | 9b3b804 | 2012-05-20 11:59:12 -0400 | [diff] [blame] | 1022 | } |
| 1023 | |
| 1024 | return 0; |
| 1025 | |
Christoph Hellwig | 9b3b804 | 2012-05-20 11:59:12 -0400 | [diff] [blame] | 1026 | } |
| 1027 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1028 | /* |
| 1029 | * Used by fabric modules containing a local struct se_cmd within their |
| 1030 | * fabric dependent per I/O descriptor. |
| 1031 | */ |
| 1032 | void transport_init_se_cmd( |
| 1033 | struct se_cmd *cmd, |
| 1034 | struct target_core_fabric_ops *tfo, |
| 1035 | struct se_session *se_sess, |
| 1036 | u32 data_length, |
| 1037 | int data_direction, |
| 1038 | int task_attr, |
| 1039 | unsigned char *sense_buffer) |
| 1040 | { |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 1041 | INIT_LIST_HEAD(&cmd->se_lun_node); |
| 1042 | INIT_LIST_HEAD(&cmd->se_delayed_node); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1043 | INIT_LIST_HEAD(&cmd->se_qf_node); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 1044 | INIT_LIST_HEAD(&cmd->se_cmd_list); |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 1045 | INIT_LIST_HEAD(&cmd->state_list); |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1046 | init_completion(&cmd->transport_lun_fe_stop_comp); |
| 1047 | init_completion(&cmd->transport_lun_stop_comp); |
| 1048 | init_completion(&cmd->t_transport_stop_comp); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 1049 | init_completion(&cmd->cmd_wait_comp); |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 1050 | init_completion(&cmd->task_stop_comp); |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1051 | spin_lock_init(&cmd->t_state_lock); |
Christoph Hellwig | 7d680f3 | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 1052 | cmd->transport_state = CMD_T_DEV_ACTIVE; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1053 | |
| 1054 | cmd->se_tfo = tfo; |
| 1055 | cmd->se_sess = se_sess; |
| 1056 | cmd->data_length = data_length; |
| 1057 | cmd->data_direction = data_direction; |
| 1058 | cmd->sam_task_attr = task_attr; |
| 1059 | cmd->sense_buffer = sense_buffer; |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 1060 | |
| 1061 | cmd->state_active = false; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1062 | } |
| 1063 | EXPORT_SYMBOL(transport_init_se_cmd); |
| 1064 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1065 | static sense_reason_t |
| 1066 | transport_check_alloc_task_attr(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1067 | { |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1068 | struct se_device *dev = cmd->se_dev; |
| 1069 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1070 | /* |
| 1071 | * Check if SAM Task Attribute emulation is enabled for this |
| 1072 | * struct se_device storage object |
| 1073 | */ |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1074 | if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1075 | return 0; |
| 1076 | |
Nicholas Bellinger | e66ecd5 | 2011-05-19 20:19:14 -0700 | [diff] [blame] | 1077 | if (cmd->sam_task_attr == MSG_ACA_TAG) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1078 | pr_debug("SAM Task Attribute ACA" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1079 | " emulation is not supported\n"); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1080 | return TCM_INVALID_CDB_FIELD; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1081 | } |
| 1082 | /* |
| 1083 | * Used to determine when ORDERED commands should go from |
| 1084 | * Dormant to Active status. |
| 1085 | */ |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1086 | cmd->se_ordered_id = atomic_inc_return(&dev->dev_ordered_id); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1087 | smp_mb__after_atomic_inc(); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1088 | 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] | 1089 | cmd->se_ordered_id, cmd->sam_task_attr, |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1090 | dev->transport->name); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1091 | return 0; |
| 1092 | } |
| 1093 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1094 | sense_reason_t |
| 1095 | target_setup_cmd_from_cdb(struct se_cmd *cmd, unsigned char *cdb) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1096 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1097 | struct se_device *dev = cmd->se_dev; |
Christoph Hellwig | cb4f4d3 | 2012-05-20 11:59:10 -0400 | [diff] [blame] | 1098 | unsigned long flags; |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1099 | sense_reason_t ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1100 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1101 | /* |
| 1102 | * Ensure that the received CDB is less than the max (252 + 8) bytes |
| 1103 | * for VARIABLE_LENGTH_CMD |
| 1104 | */ |
| 1105 | if (scsi_command_size(cdb) > SCSI_MAX_VARLEN_CDB_SIZE) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1106 | pr_err("Received SCSI CDB with command_size: %d that" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1107 | " exceeds SCSI_MAX_VARLEN_CDB_SIZE: %d\n", |
| 1108 | scsi_command_size(cdb), SCSI_MAX_VARLEN_CDB_SIZE); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1109 | return TCM_INVALID_CDB_FIELD; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1110 | } |
| 1111 | /* |
| 1112 | * If the received CDB is larger than TCM_MAX_COMMAND_SIZE, |
| 1113 | * allocate the additional extended CDB buffer now.. Otherwise |
| 1114 | * setup the pointer from __t_task_cdb to t_task_cdb. |
| 1115 | */ |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1116 | if (scsi_command_size(cdb) > sizeof(cmd->__t_task_cdb)) { |
| 1117 | cmd->t_task_cdb = kzalloc(scsi_command_size(cdb), |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1118 | GFP_KERNEL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1119 | if (!cmd->t_task_cdb) { |
| 1120 | pr_err("Unable to allocate cmd->t_task_cdb" |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1121 | " %u > sizeof(cmd->__t_task_cdb): %lu ops\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1122 | scsi_command_size(cdb), |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1123 | (unsigned long)sizeof(cmd->__t_task_cdb)); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1124 | return TCM_OUT_OF_RESOURCES; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1125 | } |
| 1126 | } else |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1127 | cmd->t_task_cdb = &cmd->__t_task_cdb[0]; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1128 | /* |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1129 | * Copy the original CDB into cmd-> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1130 | */ |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1131 | memcpy(cmd->t_task_cdb, cdb, scsi_command_size(cdb)); |
Christoph Hellwig | cb4f4d3 | 2012-05-20 11:59:10 -0400 | [diff] [blame] | 1132 | |
| 1133 | /* |
| 1134 | * Check for an existing UNIT ATTENTION condition |
| 1135 | */ |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1136 | ret = target_scsi3_ua_check(cmd); |
| 1137 | if (ret) |
| 1138 | return ret; |
Christoph Hellwig | cb4f4d3 | 2012-05-20 11:59:10 -0400 | [diff] [blame] | 1139 | |
Christoph Hellwig | c87fbd5 | 2012-10-10 17:37:16 -0400 | [diff] [blame] | 1140 | ret = target_alua_state_check(cmd); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1141 | if (ret) |
Christoph Hellwig | d977f43 | 2012-10-10 17:37:15 -0400 | [diff] [blame] | 1142 | return ret; |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1143 | |
| 1144 | ret = target_check_reservation(cmd); |
| 1145 | if (ret) |
| 1146 | return ret; |
Christoph Hellwig | cb4f4d3 | 2012-05-20 11:59:10 -0400 | [diff] [blame] | 1147 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1148 | ret = dev->transport->parse_cdb(cmd); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1149 | if (ret) |
| 1150 | return ret; |
| 1151 | |
| 1152 | ret = transport_check_alloc_task_attr(cmd); |
| 1153 | if (ret) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1154 | return ret; |
Christoph Hellwig | cb4f4d3 | 2012-05-20 11:59:10 -0400 | [diff] [blame] | 1155 | |
| 1156 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
| 1157 | cmd->se_cmd_flags |= SCF_SUPPORTED_SAM_OPCODE; |
| 1158 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
| 1159 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1160 | spin_lock(&cmd->se_lun->lun_sep_lock); |
| 1161 | if (cmd->se_lun->lun_sep) |
| 1162 | cmd->se_lun->lun_sep->sep_stats.cmd_pdus++; |
| 1163 | spin_unlock(&cmd->se_lun->lun_sep_lock); |
| 1164 | return 0; |
| 1165 | } |
Andy Grover | a12f41f | 2012-04-03 15:51:20 -0700 | [diff] [blame] | 1166 | EXPORT_SYMBOL(target_setup_cmd_from_cdb); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1167 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1168 | /* |
Nicholas Bellinger | 695434e1 | 2011-06-03 20:59:19 -0700 | [diff] [blame] | 1169 | * Used by fabric module frontends to queue tasks directly. |
| 1170 | * Many only be used from process context only |
| 1171 | */ |
| 1172 | int transport_handle_cdb_direct( |
| 1173 | struct se_cmd *cmd) |
| 1174 | { |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1175 | sense_reason_t ret; |
Nicholas Bellinger | dd8ae59 | 2011-07-30 05:03:58 -0700 | [diff] [blame] | 1176 | |
Nicholas Bellinger | 695434e1 | 2011-06-03 20:59:19 -0700 | [diff] [blame] | 1177 | if (!cmd->se_lun) { |
| 1178 | dump_stack(); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1179 | pr_err("cmd->se_lun is NULL\n"); |
Nicholas Bellinger | 695434e1 | 2011-06-03 20:59:19 -0700 | [diff] [blame] | 1180 | return -EINVAL; |
| 1181 | } |
| 1182 | if (in_interrupt()) { |
| 1183 | dump_stack(); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1184 | pr_err("transport_generic_handle_cdb cannot be called" |
Nicholas Bellinger | 695434e1 | 2011-06-03 20:59:19 -0700 | [diff] [blame] | 1185 | " from interrupt context\n"); |
| 1186 | return -EINVAL; |
| 1187 | } |
Nicholas Bellinger | dd8ae59 | 2011-07-30 05:03:58 -0700 | [diff] [blame] | 1188 | /* |
Christoph Hellwig | af87729 | 2012-07-08 15:58:49 -0400 | [diff] [blame] | 1189 | * Set TRANSPORT_NEW_CMD state and CMD_T_ACTIVE to ensure that |
| 1190 | * outstanding descriptors are handled correctly during shutdown via |
| 1191 | * transport_wait_for_tasks() |
Nicholas Bellinger | dd8ae59 | 2011-07-30 05:03:58 -0700 | [diff] [blame] | 1192 | * |
| 1193 | * Also, we don't take cmd->t_state_lock here as we only expect |
| 1194 | * this to be called for initial descriptor submission. |
| 1195 | */ |
| 1196 | cmd->t_state = TRANSPORT_NEW_CMD; |
Christoph Hellwig | 7d680f3 | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 1197 | cmd->transport_state |= CMD_T_ACTIVE; |
| 1198 | |
Nicholas Bellinger | dd8ae59 | 2011-07-30 05:03:58 -0700 | [diff] [blame] | 1199 | /* |
| 1200 | * transport_generic_new_cmd() is already handling QUEUE_FULL, |
| 1201 | * so follow TRANSPORT_NEW_CMD processing thread context usage |
| 1202 | * and call transport_generic_request_failure() if necessary.. |
| 1203 | */ |
| 1204 | ret = transport_generic_new_cmd(cmd); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1205 | if (ret) |
| 1206 | transport_generic_request_failure(cmd, ret); |
Nicholas Bellinger | dd8ae59 | 2011-07-30 05:03:58 -0700 | [diff] [blame] | 1207 | return 0; |
Nicholas Bellinger | 695434e1 | 2011-06-03 20:59:19 -0700 | [diff] [blame] | 1208 | } |
| 1209 | EXPORT_SYMBOL(transport_handle_cdb_direct); |
| 1210 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1211 | static sense_reason_t |
| 1212 | transport_generic_map_mem_to_cmd(struct se_cmd *cmd, struct scatterlist *sgl, |
| 1213 | u32 sgl_count, struct scatterlist *sgl_bidi, u32 sgl_bidi_count) |
| 1214 | { |
| 1215 | if (!sgl || !sgl_count) |
| 1216 | return 0; |
| 1217 | |
| 1218 | /* |
| 1219 | * Reject SCSI data overflow with map_mem_to_cmd() as incoming |
| 1220 | * scatterlists already have been set to follow what the fabric |
| 1221 | * passes for the original expected data transfer length. |
| 1222 | */ |
| 1223 | if (cmd->se_cmd_flags & SCF_OVERFLOW_BIT) { |
| 1224 | pr_warn("Rejecting SCSI DATA overflow for fabric using" |
| 1225 | " SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC\n"); |
| 1226 | return TCM_INVALID_CDB_FIELD; |
| 1227 | } |
| 1228 | |
| 1229 | cmd->t_data_sg = sgl; |
| 1230 | cmd->t_data_nents = sgl_count; |
| 1231 | |
| 1232 | if (sgl_bidi && sgl_bidi_count) { |
| 1233 | cmd->t_bidi_data_sg = sgl_bidi; |
| 1234 | cmd->t_bidi_data_nents = sgl_bidi_count; |
| 1235 | } |
| 1236 | cmd->se_cmd_flags |= SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; |
| 1237 | return 0; |
| 1238 | } |
| 1239 | |
Nicholas Bellinger | a026757 | 2012-10-01 17:23:22 -0700 | [diff] [blame] | 1240 | /* |
| 1241 | * target_submit_cmd_map_sgls - lookup unpacked lun and submit uninitialized |
| 1242 | * se_cmd + use pre-allocated SGL memory. |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 1243 | * |
| 1244 | * @se_cmd: command descriptor to submit |
| 1245 | * @se_sess: associated se_sess for endpoint |
| 1246 | * @cdb: pointer to SCSI CDB |
| 1247 | * @sense: pointer to SCSI sense buffer |
| 1248 | * @unpacked_lun: unpacked LUN to reference for struct se_lun |
| 1249 | * @data_length: fabric expected data transfer length |
| 1250 | * @task_addr: SAM task attribute |
| 1251 | * @data_dir: DMA data direction |
| 1252 | * @flags: flags for command submission from target_sc_flags_tables |
Nicholas Bellinger | a026757 | 2012-10-01 17:23:22 -0700 | [diff] [blame] | 1253 | * @sgl: struct scatterlist memory for unidirectional mapping |
| 1254 | * @sgl_count: scatterlist count for unidirectional mapping |
| 1255 | * @sgl_bidi: struct scatterlist memory for bidirectional READ mapping |
| 1256 | * @sgl_bidi_count: scatterlist count for bidirectional READ mapping |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 1257 | * |
Roland Dreier | d6dfc86 | 2012-07-16 11:04:39 -0700 | [diff] [blame] | 1258 | * Returns non zero to signal active I/O shutdown failure. All other |
| 1259 | * setup exceptions will be returned as a SCSI CHECK_CONDITION response, |
| 1260 | * but still return zero here. |
| 1261 | * |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 1262 | * This may only be called from process context, and also currently |
| 1263 | * assumes internal allocation of fabric payload buffer by target-core. |
Nicholas Bellinger | a026757 | 2012-10-01 17:23:22 -0700 | [diff] [blame] | 1264 | */ |
| 1265 | 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] | 1266 | unsigned char *cdb, unsigned char *sense, u32 unpacked_lun, |
Nicholas Bellinger | a026757 | 2012-10-01 17:23:22 -0700 | [diff] [blame] | 1267 | u32 data_length, int task_attr, int data_dir, int flags, |
| 1268 | struct scatterlist *sgl, u32 sgl_count, |
| 1269 | struct scatterlist *sgl_bidi, u32 sgl_bidi_count) |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 1270 | { |
| 1271 | struct se_portal_group *se_tpg; |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1272 | sense_reason_t rc; |
| 1273 | int ret; |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 1274 | |
| 1275 | se_tpg = se_sess->se_tpg; |
| 1276 | BUG_ON(!se_tpg); |
| 1277 | BUG_ON(se_cmd->se_tfo || se_cmd->se_sess); |
| 1278 | BUG_ON(in_interrupt()); |
| 1279 | /* |
| 1280 | * Initialize se_cmd for target operation. From this point |
| 1281 | * exceptions are handled by sending exception status via |
| 1282 | * target_core_fabric_ops->queue_status() callback |
| 1283 | */ |
| 1284 | transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess, |
| 1285 | data_length, data_dir, task_attr, sense); |
Sebastian Andrzej Siewior | b0d7994 | 2012-01-10 14:16:59 +0100 | [diff] [blame] | 1286 | if (flags & TARGET_SCF_UNKNOWN_SIZE) |
| 1287 | se_cmd->unknown_data_length = 1; |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 1288 | /* |
| 1289 | * Obtain struct se_cmd->cmd_kref reference and add new cmd to |
| 1290 | * se_sess->sess_cmd_list. A second kref_get here is necessary |
| 1291 | * for fabrics using TARGET_SCF_ACK_KREF that expect a second |
| 1292 | * kref_put() to happen during fabric packet acknowledgement. |
| 1293 | */ |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1294 | ret = target_get_sess_cmd(se_sess, se_cmd, (flags & TARGET_SCF_ACK_KREF)); |
| 1295 | if (ret) |
| 1296 | return ret; |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 1297 | /* |
| 1298 | * Signal bidirectional data payloads to target-core |
| 1299 | */ |
| 1300 | if (flags & TARGET_SCF_BIDI_OP) |
| 1301 | se_cmd->se_cmd_flags |= SCF_BIDI; |
| 1302 | /* |
| 1303 | * Locate se_lun pointer and attach it to struct se_cmd |
| 1304 | */ |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1305 | rc = transport_lookup_cmd_lun(se_cmd, unpacked_lun); |
| 1306 | if (rc) { |
| 1307 | transport_send_check_condition_and_sense(se_cmd, rc, 0); |
Nicholas Bellinger | 735703c | 2012-01-20 19:02:56 -0800 | [diff] [blame] | 1308 | target_put_sess_cmd(se_sess, se_cmd); |
Roland Dreier | d6dfc86 | 2012-07-16 11:04:39 -0700 | [diff] [blame] | 1309 | return 0; |
Nicholas Bellinger | 735703c | 2012-01-20 19:02:56 -0800 | [diff] [blame] | 1310 | } |
Christoph Hellwig | d6e0175 | 2012-05-20 11:59:14 -0400 | [diff] [blame] | 1311 | |
Andy Grover | a12f41f | 2012-04-03 15:51:20 -0700 | [diff] [blame] | 1312 | rc = target_setup_cmd_from_cdb(se_cmd, cdb); |
Nicholas Bellinger | 735703c | 2012-01-20 19:02:56 -0800 | [diff] [blame] | 1313 | if (rc != 0) { |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1314 | transport_generic_request_failure(se_cmd, rc); |
Roland Dreier | d6dfc86 | 2012-07-16 11:04:39 -0700 | [diff] [blame] | 1315 | return 0; |
Nicholas Bellinger | 735703c | 2012-01-20 19:02:56 -0800 | [diff] [blame] | 1316 | } |
Nicholas Bellinger | a026757 | 2012-10-01 17:23:22 -0700 | [diff] [blame] | 1317 | /* |
| 1318 | * When a non zero sgl_count has been passed perform SGL passthrough |
| 1319 | * mapping for pre-allocated fabric memory instead of having target |
| 1320 | * core perform an internal SGL allocation.. |
| 1321 | */ |
| 1322 | if (sgl_count != 0) { |
| 1323 | BUG_ON(!sgl); |
Andy Grover | 11e319e | 2012-04-03 15:51:28 -0700 | [diff] [blame] | 1324 | |
Nicholas Bellinger | 944981c | 2012-10-02 14:00:33 -0700 | [diff] [blame] | 1325 | /* |
| 1326 | * A work-around for tcm_loop as some userspace code via |
| 1327 | * scsi-generic do not memset their associated read buffers, |
| 1328 | * so go ahead and do that here for type non-data CDBs. Also |
| 1329 | * note that this is currently guaranteed to be a single SGL |
| 1330 | * for this case by target core in target_setup_cmd_from_cdb() |
| 1331 | * -> transport_generic_cmd_sequencer(). |
| 1332 | */ |
| 1333 | if (!(se_cmd->se_cmd_flags & SCF_SCSI_DATA_CDB) && |
| 1334 | se_cmd->data_direction == DMA_FROM_DEVICE) { |
| 1335 | unsigned char *buf = NULL; |
| 1336 | |
| 1337 | if (sgl) |
| 1338 | buf = kmap(sg_page(sgl)) + sgl->offset; |
| 1339 | |
| 1340 | if (buf) { |
| 1341 | memset(buf, 0, sgl->length); |
| 1342 | kunmap(sg_page(sgl)); |
| 1343 | } |
| 1344 | } |
| 1345 | |
Nicholas Bellinger | a026757 | 2012-10-01 17:23:22 -0700 | [diff] [blame] | 1346 | rc = transport_generic_map_mem_to_cmd(se_cmd, sgl, sgl_count, |
| 1347 | sgl_bidi, sgl_bidi_count); |
| 1348 | if (rc != 0) { |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1349 | transport_generic_request_failure(se_cmd, rc); |
Nicholas Bellinger | a026757 | 2012-10-01 17:23:22 -0700 | [diff] [blame] | 1350 | return 0; |
| 1351 | } |
| 1352 | } |
Andy Grover | 11e319e | 2012-04-03 15:51:28 -0700 | [diff] [blame] | 1353 | /* |
| 1354 | * Check if we need to delay processing because of ALUA |
| 1355 | * Active/NonOptimized primary access state.. |
| 1356 | */ |
| 1357 | core_alua_check_nonop_delay(se_cmd); |
| 1358 | |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 1359 | transport_handle_cdb_direct(se_cmd); |
Roland Dreier | d6dfc86 | 2012-07-16 11:04:39 -0700 | [diff] [blame] | 1360 | return 0; |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 1361 | } |
Nicholas Bellinger | a026757 | 2012-10-01 17:23:22 -0700 | [diff] [blame] | 1362 | EXPORT_SYMBOL(target_submit_cmd_map_sgls); |
| 1363 | |
| 1364 | /* |
| 1365 | * target_submit_cmd - lookup unpacked lun and submit uninitialized se_cmd |
| 1366 | * |
| 1367 | * @se_cmd: command descriptor to submit |
| 1368 | * @se_sess: associated se_sess for endpoint |
| 1369 | * @cdb: pointer to SCSI CDB |
| 1370 | * @sense: pointer to SCSI sense buffer |
| 1371 | * @unpacked_lun: unpacked LUN to reference for struct se_lun |
| 1372 | * @data_length: fabric expected data transfer length |
| 1373 | * @task_addr: SAM task attribute |
| 1374 | * @data_dir: DMA data direction |
| 1375 | * @flags: flags for command submission from target_sc_flags_tables |
| 1376 | * |
| 1377 | * Returns non zero to signal active I/O shutdown failure. All other |
| 1378 | * setup exceptions will be returned as a SCSI CHECK_CONDITION response, |
| 1379 | * but still return zero here. |
| 1380 | * |
| 1381 | * This may only be called from process context, and also currently |
| 1382 | * assumes internal allocation of fabric payload buffer by target-core. |
| 1383 | * |
| 1384 | * It also assumes interal target core SGL memory allocation. |
| 1385 | */ |
| 1386 | int target_submit_cmd(struct se_cmd *se_cmd, struct se_session *se_sess, |
| 1387 | unsigned char *cdb, unsigned char *sense, u32 unpacked_lun, |
| 1388 | u32 data_length, int task_attr, int data_dir, int flags) |
| 1389 | { |
| 1390 | return target_submit_cmd_map_sgls(se_cmd, se_sess, cdb, sense, |
| 1391 | unpacked_lun, data_length, task_attr, data_dir, |
| 1392 | flags, NULL, 0, NULL, 0); |
| 1393 | } |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 1394 | EXPORT_SYMBOL(target_submit_cmd); |
| 1395 | |
Nicholas Bellinger | 9f0d05c | 2012-02-25 05:02:48 -0800 | [diff] [blame] | 1396 | static void target_complete_tmr_failure(struct work_struct *work) |
| 1397 | { |
| 1398 | struct se_cmd *se_cmd = container_of(work, struct se_cmd, work); |
| 1399 | |
| 1400 | se_cmd->se_tmr_req->response = TMR_LUN_DOES_NOT_EXIST; |
| 1401 | se_cmd->se_tfo->queue_tm_rsp(se_cmd); |
Nicholas Bellinger | 9f0d05c | 2012-02-25 05:02:48 -0800 | [diff] [blame] | 1402 | } |
| 1403 | |
Andy Grover | ea98d7f | 2012-01-19 13:39:21 -0800 | [diff] [blame] | 1404 | /** |
| 1405 | * target_submit_tmr - lookup unpacked lun and submit uninitialized se_cmd |
| 1406 | * for TMR CDBs |
| 1407 | * |
| 1408 | * @se_cmd: command descriptor to submit |
| 1409 | * @se_sess: associated se_sess for endpoint |
| 1410 | * @sense: pointer to SCSI sense buffer |
| 1411 | * @unpacked_lun: unpacked LUN to reference for struct se_lun |
| 1412 | * @fabric_context: fabric context for TMR req |
| 1413 | * @tm_type: Type of TM request |
Nicholas Bellinger | c0974f8 | 2012-02-25 05:10:04 -0800 | [diff] [blame] | 1414 | * @gfp: gfp type for caller |
| 1415 | * @tag: referenced task tag for TMR_ABORT_TASK |
Nicholas Bellinger | c7042ca | 2012-02-25 01:40:24 -0800 | [diff] [blame] | 1416 | * @flags: submit cmd flags |
Andy Grover | ea98d7f | 2012-01-19 13:39:21 -0800 | [diff] [blame] | 1417 | * |
| 1418 | * Callable from all contexts. |
| 1419 | **/ |
| 1420 | |
Nicholas Bellinger | c7042ca | 2012-02-25 01:40:24 -0800 | [diff] [blame] | 1421 | 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] | 1422 | unsigned char *sense, u32 unpacked_lun, |
Nicholas Bellinger | c0974f8 | 2012-02-25 05:10:04 -0800 | [diff] [blame] | 1423 | void *fabric_tmr_ptr, unsigned char tm_type, |
| 1424 | gfp_t gfp, unsigned int tag, int flags) |
Andy Grover | ea98d7f | 2012-01-19 13:39:21 -0800 | [diff] [blame] | 1425 | { |
| 1426 | struct se_portal_group *se_tpg; |
| 1427 | int ret; |
| 1428 | |
| 1429 | se_tpg = se_sess->se_tpg; |
| 1430 | BUG_ON(!se_tpg); |
| 1431 | |
| 1432 | transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess, |
| 1433 | 0, DMA_NONE, MSG_SIMPLE_TAG, sense); |
Nicholas Bellinger | c7042ca | 2012-02-25 01:40:24 -0800 | [diff] [blame] | 1434 | /* |
| 1435 | * FIXME: Currently expect caller to handle se_cmd->se_tmr_req |
| 1436 | * allocation failure. |
| 1437 | */ |
Nicholas Bellinger | c0974f8 | 2012-02-25 05:10:04 -0800 | [diff] [blame] | 1438 | 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] | 1439 | if (ret < 0) |
| 1440 | return -ENOMEM; |
Andy Grover | ea98d7f | 2012-01-19 13:39:21 -0800 | [diff] [blame] | 1441 | |
Nicholas Bellinger | c0974f8 | 2012-02-25 05:10:04 -0800 | [diff] [blame] | 1442 | if (tm_type == TMR_ABORT_TASK) |
| 1443 | se_cmd->se_tmr_req->ref_task_tag = tag; |
| 1444 | |
Andy Grover | ea98d7f | 2012-01-19 13:39:21 -0800 | [diff] [blame] | 1445 | /* See target_submit_cmd for commentary */ |
Roland Dreier | bc187ea | 2012-07-16 11:04:40 -0700 | [diff] [blame] | 1446 | ret = target_get_sess_cmd(se_sess, se_cmd, (flags & TARGET_SCF_ACK_KREF)); |
| 1447 | if (ret) { |
| 1448 | core_tmr_release_req(se_cmd->se_tmr_req); |
| 1449 | return ret; |
| 1450 | } |
Andy Grover | ea98d7f | 2012-01-19 13:39:21 -0800 | [diff] [blame] | 1451 | |
Andy Grover | ea98d7f | 2012-01-19 13:39:21 -0800 | [diff] [blame] | 1452 | ret = transport_lookup_tmr_lun(se_cmd, unpacked_lun); |
| 1453 | if (ret) { |
Nicholas Bellinger | 9f0d05c | 2012-02-25 05:02:48 -0800 | [diff] [blame] | 1454 | /* |
| 1455 | * For callback during failure handling, push this work off |
| 1456 | * to process context with TMR_LUN_DOES_NOT_EXIST status. |
| 1457 | */ |
| 1458 | INIT_WORK(&se_cmd->work, target_complete_tmr_failure); |
| 1459 | schedule_work(&se_cmd->work); |
Nicholas Bellinger | c7042ca | 2012-02-25 01:40:24 -0800 | [diff] [blame] | 1460 | return 0; |
Andy Grover | ea98d7f | 2012-01-19 13:39:21 -0800 | [diff] [blame] | 1461 | } |
| 1462 | transport_generic_handle_tmr(se_cmd); |
Nicholas Bellinger | c7042ca | 2012-02-25 01:40:24 -0800 | [diff] [blame] | 1463 | return 0; |
Andy Grover | ea98d7f | 2012-01-19 13:39:21 -0800 | [diff] [blame] | 1464 | } |
| 1465 | EXPORT_SYMBOL(target_submit_tmr); |
| 1466 | |
Christoph Hellwig | cdbb70b | 2011-10-17 13:56:46 -0400 | [diff] [blame] | 1467 | /* |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 1468 | * 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] | 1469 | * has completed. |
| 1470 | */ |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 1471 | bool target_stop_cmd(struct se_cmd *cmd, unsigned long *flags) |
Christoph Hellwig | cdbb70b | 2011-10-17 13:56:46 -0400 | [diff] [blame] | 1472 | { |
Christoph Hellwig | cdbb70b | 2011-10-17 13:56:46 -0400 | [diff] [blame] | 1473 | bool was_active = false; |
| 1474 | |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 1475 | if (cmd->transport_state & CMD_T_BUSY) { |
| 1476 | cmd->transport_state |= CMD_T_REQUEST_STOP; |
Christoph Hellwig | cdbb70b | 2011-10-17 13:56:46 -0400 | [diff] [blame] | 1477 | spin_unlock_irqrestore(&cmd->t_state_lock, *flags); |
| 1478 | |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 1479 | pr_debug("cmd %p waiting to complete\n", cmd); |
| 1480 | wait_for_completion(&cmd->task_stop_comp); |
| 1481 | pr_debug("cmd %p stopped successfully\n", cmd); |
Christoph Hellwig | cdbb70b | 2011-10-17 13:56:46 -0400 | [diff] [blame] | 1482 | |
| 1483 | spin_lock_irqsave(&cmd->t_state_lock, *flags); |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 1484 | cmd->transport_state &= ~CMD_T_REQUEST_STOP; |
| 1485 | cmd->transport_state &= ~CMD_T_BUSY; |
Christoph Hellwig | cdbb70b | 2011-10-17 13:56:46 -0400 | [diff] [blame] | 1486 | was_active = true; |
| 1487 | } |
| 1488 | |
Christoph Hellwig | cdbb70b | 2011-10-17 13:56:46 -0400 | [diff] [blame] | 1489 | return was_active; |
| 1490 | } |
| 1491 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1492 | /* |
| 1493 | * Handle SAM-esque emulation for generic transport request failures. |
| 1494 | */ |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1495 | void transport_generic_request_failure(struct se_cmd *cmd, |
| 1496 | sense_reason_t sense_reason) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1497 | { |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1498 | int ret = 0; |
| 1499 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1500 | pr_debug("-----[ Storage Engine Exception for cmd: %p ITT: 0x%08x" |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1501 | " CDB: 0x%02x\n", cmd, cmd->se_tfo->get_task_tag(cmd), |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1502 | cmd->t_task_cdb[0]); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1503 | pr_debug("-----[ i_state: %d t_state: %d sense_reason: %d\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1504 | cmd->se_tfo->get_cmd_state(cmd), |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1505 | cmd->t_state, sense_reason); |
Christoph Hellwig | d43d6ae | 2012-04-24 00:25:08 -0400 | [diff] [blame] | 1506 | pr_debug("-----[ CMD_T_ACTIVE: %d CMD_T_STOP: %d CMD_T_SENT: %d\n", |
Christoph Hellwig | 7d680f3 | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 1507 | (cmd->transport_state & CMD_T_ACTIVE) != 0, |
| 1508 | (cmd->transport_state & CMD_T_STOP) != 0, |
| 1509 | (cmd->transport_state & CMD_T_SENT) != 0); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1510 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1511 | /* |
| 1512 | * For SAM Task Attribute emulation for failed struct se_cmd |
| 1513 | */ |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1514 | transport_complete_task_attr(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1515 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1516 | switch (sense_reason) { |
Nicholas Bellinger | 03e98c9 | 2011-11-04 02:36:16 -0700 | [diff] [blame] | 1517 | case TCM_NON_EXISTENT_LUN: |
| 1518 | case TCM_UNSUPPORTED_SCSI_OPCODE: |
| 1519 | case TCM_INVALID_CDB_FIELD: |
| 1520 | case TCM_INVALID_PARAMETER_LIST: |
| 1521 | case TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE: |
| 1522 | case TCM_UNKNOWN_MODE_PAGE: |
| 1523 | case TCM_WRITE_PROTECTED: |
Roland Dreier | e2397c7 | 2012-07-16 15:34:21 -0700 | [diff] [blame] | 1524 | case TCM_ADDRESS_OUT_OF_RANGE: |
Nicholas Bellinger | 03e98c9 | 2011-11-04 02:36:16 -0700 | [diff] [blame] | 1525 | case TCM_CHECK_CONDITION_ABORT_CMD: |
| 1526 | case TCM_CHECK_CONDITION_UNIT_ATTENTION: |
| 1527 | case TCM_CHECK_CONDITION_NOT_READY: |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1528 | break; |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1529 | case TCM_OUT_OF_RESOURCES: |
| 1530 | sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 1531 | break; |
Nicholas Bellinger | 03e98c9 | 2011-11-04 02:36:16 -0700 | [diff] [blame] | 1532 | case TCM_RESERVATION_CONFLICT: |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1533 | /* |
| 1534 | * No SENSE Data payload for this case, set SCSI Status |
| 1535 | * and queue the response to $FABRIC_MOD. |
| 1536 | * |
| 1537 | * Uses linux/include/scsi/scsi.h SAM status codes defs |
| 1538 | */ |
| 1539 | cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT; |
| 1540 | /* |
| 1541 | * For UA Interlock Code 11b, a RESERVATION CONFLICT will |
| 1542 | * establish a UNIT ATTENTION with PREVIOUS RESERVATION |
| 1543 | * CONFLICT STATUS. |
| 1544 | * |
| 1545 | * See spc4r17, section 7.4.6 Control Mode Page, Table 349 |
| 1546 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1547 | if (cmd->se_sess && |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1548 | cmd->se_dev->dev_attrib.emulate_ua_intlck_ctrl == 2) |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1549 | core_scsi3_ua_allocate(cmd->se_sess->se_node_acl, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1550 | cmd->orig_fe_lun, 0x2C, |
| 1551 | ASCQ_2CH_PREVIOUS_RESERVATION_CONFLICT_STATUS); |
| 1552 | |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1553 | ret = cmd->se_tfo->queue_status(cmd); |
Nicholas Bellinger | f147abb | 2011-10-25 23:57:41 -0700 | [diff] [blame] | 1554 | if (ret == -EAGAIN || ret == -ENOMEM) |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1555 | goto queue_full; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1556 | goto check_stop; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1557 | default: |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1558 | pr_err("Unknown transport error for CDB 0x%02x: %d\n", |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1559 | cmd->t_task_cdb[0], sense_reason); |
| 1560 | sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1561 | break; |
| 1562 | } |
Christoph Hellwig | f314643 | 2012-07-08 15:58:48 -0400 | [diff] [blame] | 1563 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1564 | ret = transport_send_check_condition_and_sense(cmd, sense_reason, 0); |
Nicholas Bellinger | 03e98c9 | 2011-11-04 02:36:16 -0700 | [diff] [blame] | 1565 | if (ret == -EAGAIN || ret == -ENOMEM) |
| 1566 | goto queue_full; |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1567 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1568 | check_stop: |
| 1569 | transport_lun_remove_cmd(cmd); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1570 | if (!transport_cmd_check_stop_to_fabric(cmd)) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1571 | ; |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1572 | return; |
| 1573 | |
| 1574 | queue_full: |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 1575 | cmd->t_state = TRANSPORT_COMPLETE_QF_OK; |
| 1576 | transport_handle_queue_full(cmd, cmd->se_dev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1577 | } |
Nicholas Bellinger | 2fbff12 | 2012-02-10 16:18:11 -0800 | [diff] [blame] | 1578 | EXPORT_SYMBOL(transport_generic_request_failure); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1579 | |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 1580 | static void __target_execute_cmd(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1581 | { |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1582 | sense_reason_t ret; |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 1583 | |
| 1584 | spin_lock_irq(&cmd->t_state_lock); |
| 1585 | cmd->transport_state |= (CMD_T_BUSY|CMD_T_SENT); |
| 1586 | spin_unlock_irq(&cmd->t_state_lock); |
| 1587 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1588 | if (cmd->execute_cmd) { |
| 1589 | ret = cmd->execute_cmd(cmd); |
| 1590 | if (ret) { |
| 1591 | spin_lock_irq(&cmd->t_state_lock); |
| 1592 | cmd->transport_state &= ~(CMD_T_BUSY|CMD_T_SENT); |
| 1593 | spin_unlock_irq(&cmd->t_state_lock); |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 1594 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1595 | transport_generic_request_failure(cmd, ret); |
| 1596 | } |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 1597 | } |
| 1598 | } |
| 1599 | |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1600 | static bool target_handle_task_attr(struct se_cmd *cmd) |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 1601 | { |
| 1602 | struct se_device *dev = cmd->se_dev; |
| 1603 | |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1604 | if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) |
| 1605 | return false; |
| 1606 | |
| 1607 | /* |
| 1608 | * Check for the existence of HEAD_OF_QUEUE, and if true return 1 |
| 1609 | * to allow the passed struct se_cmd list of tasks to the front of the list. |
| 1610 | */ |
| 1611 | switch (cmd->sam_task_attr) { |
| 1612 | case MSG_HEAD_TAG: |
| 1613 | pr_debug("Added HEAD_OF_QUEUE for CDB: 0x%02x, " |
| 1614 | "se_ordered_id: %u\n", |
| 1615 | cmd->t_task_cdb[0], cmd->se_ordered_id); |
| 1616 | return false; |
| 1617 | case MSG_ORDERED_TAG: |
| 1618 | atomic_inc(&dev->dev_ordered_sync); |
| 1619 | smp_mb__after_atomic_inc(); |
| 1620 | |
| 1621 | pr_debug("Added ORDERED for CDB: 0x%02x to ordered list, " |
| 1622 | " se_ordered_id: %u\n", |
| 1623 | cmd->t_task_cdb[0], cmd->se_ordered_id); |
| 1624 | |
| 1625 | /* |
| 1626 | * Execute an ORDERED command if no other older commands |
| 1627 | * exist that need to be completed first. |
| 1628 | */ |
| 1629 | if (!atomic_read(&dev->simple_cmds)) |
| 1630 | return false; |
| 1631 | break; |
| 1632 | default: |
| 1633 | /* |
| 1634 | * For SIMPLE and UNTAGGED Task Attribute commands |
| 1635 | */ |
| 1636 | atomic_inc(&dev->simple_cmds); |
| 1637 | smp_mb__after_atomic_inc(); |
| 1638 | break; |
| 1639 | } |
| 1640 | |
| 1641 | if (atomic_read(&dev->dev_ordered_sync) == 0) |
| 1642 | return false; |
| 1643 | |
| 1644 | spin_lock(&dev->delayed_cmd_lock); |
| 1645 | list_add_tail(&cmd->se_delayed_node, &dev->delayed_cmd_list); |
| 1646 | spin_unlock(&dev->delayed_cmd_lock); |
| 1647 | |
| 1648 | pr_debug("Added CDB: 0x%02x Task Attr: 0x%02x to" |
| 1649 | " delayed CMD list, se_ordered_id: %u\n", |
| 1650 | cmd->t_task_cdb[0], cmd->sam_task_attr, |
| 1651 | cmd->se_ordered_id); |
| 1652 | return true; |
| 1653 | } |
| 1654 | |
| 1655 | void target_execute_cmd(struct se_cmd *cmd) |
| 1656 | { |
Christoph Hellwig | f7113a4 | 2012-07-08 15:58:38 -0400 | [diff] [blame] | 1657 | /* |
Christoph Hellwig | d59a02b | 2012-07-08 15:58:40 -0400 | [diff] [blame] | 1658 | * If the received CDB has aleady been aborted stop processing it here. |
| 1659 | */ |
| 1660 | if (transport_check_aborted_status(cmd, 1)) |
| 1661 | return; |
| 1662 | |
| 1663 | /* |
Christoph Hellwig | f7113a4 | 2012-07-08 15:58:38 -0400 | [diff] [blame] | 1664 | * Determine if IOCTL context caller in requesting the stopping of this |
| 1665 | * command for LUN shutdown purposes. |
| 1666 | */ |
| 1667 | spin_lock_irq(&cmd->t_state_lock); |
| 1668 | if (cmd->transport_state & CMD_T_LUN_STOP) { |
| 1669 | pr_debug("%s:%d CMD_T_LUN_STOP for ITT: 0x%08x\n", |
| 1670 | __func__, __LINE__, cmd->se_tfo->get_task_tag(cmd)); |
| 1671 | |
| 1672 | cmd->transport_state &= ~CMD_T_ACTIVE; |
| 1673 | spin_unlock_irq(&cmd->t_state_lock); |
| 1674 | complete(&cmd->transport_lun_stop_comp); |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 1675 | return; |
Christoph Hellwig | f7113a4 | 2012-07-08 15:58:38 -0400 | [diff] [blame] | 1676 | } |
| 1677 | /* |
| 1678 | * Determine if frontend context caller is requesting the stopping of |
| 1679 | * this command for frontend exceptions. |
| 1680 | */ |
| 1681 | if (cmd->transport_state & CMD_T_STOP) { |
| 1682 | pr_debug("%s:%d CMD_T_STOP for ITT: 0x%08x\n", |
| 1683 | __func__, __LINE__, |
| 1684 | cmd->se_tfo->get_task_tag(cmd)); |
| 1685 | |
| 1686 | spin_unlock_irq(&cmd->t_state_lock); |
| 1687 | complete(&cmd->t_transport_stop_comp); |
| 1688 | return; |
| 1689 | } |
| 1690 | |
| 1691 | cmd->t_state = TRANSPORT_PROCESSING; |
| 1692 | spin_unlock_irq(&cmd->t_state_lock); |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 1693 | |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1694 | if (!target_handle_task_attr(cmd)) |
| 1695 | __target_execute_cmd(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1696 | } |
Christoph Hellwig | 70baf0a | 2012-07-08 15:58:39 -0400 | [diff] [blame] | 1697 | EXPORT_SYMBOL(target_execute_cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1698 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1699 | /* |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 1700 | * Process all commands up to the last received ORDERED task attribute which |
| 1701 | * requires another blocking boundary |
| 1702 | */ |
| 1703 | static void target_restart_delayed_cmds(struct se_device *dev) |
| 1704 | { |
| 1705 | for (;;) { |
| 1706 | struct se_cmd *cmd; |
| 1707 | |
| 1708 | spin_lock(&dev->delayed_cmd_lock); |
| 1709 | if (list_empty(&dev->delayed_cmd_list)) { |
| 1710 | spin_unlock(&dev->delayed_cmd_lock); |
| 1711 | break; |
| 1712 | } |
| 1713 | |
| 1714 | cmd = list_entry(dev->delayed_cmd_list.next, |
| 1715 | struct se_cmd, se_delayed_node); |
| 1716 | list_del(&cmd->se_delayed_node); |
| 1717 | spin_unlock(&dev->delayed_cmd_lock); |
| 1718 | |
| 1719 | __target_execute_cmd(cmd); |
| 1720 | |
| 1721 | if (cmd->sam_task_attr == MSG_ORDERED_TAG) |
| 1722 | break; |
| 1723 | } |
| 1724 | } |
| 1725 | |
| 1726 | /* |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 1727 | * Called from I/O completion to determine which dormant/delayed |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1728 | * and ordered cmds need to have their tasks added to the execution queue. |
| 1729 | */ |
| 1730 | static void transport_complete_task_attr(struct se_cmd *cmd) |
| 1731 | { |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 1732 | struct se_device *dev = cmd->se_dev; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1733 | |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1734 | if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) |
| 1735 | return; |
| 1736 | |
Nicholas Bellinger | e66ecd5 | 2011-05-19 20:19:14 -0700 | [diff] [blame] | 1737 | if (cmd->sam_task_attr == MSG_SIMPLE_TAG) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1738 | atomic_dec(&dev->simple_cmds); |
| 1739 | smp_mb__after_atomic_dec(); |
| 1740 | dev->dev_cur_ordered_id++; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1741 | pr_debug("Incremented dev->dev_cur_ordered_id: %u for" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1742 | " SIMPLE: %u\n", dev->dev_cur_ordered_id, |
| 1743 | cmd->se_ordered_id); |
Nicholas Bellinger | e66ecd5 | 2011-05-19 20:19:14 -0700 | [diff] [blame] | 1744 | } else if (cmd->sam_task_attr == MSG_HEAD_TAG) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1745 | dev->dev_cur_ordered_id++; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1746 | pr_debug("Incremented dev_cur_ordered_id: %u for" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1747 | " HEAD_OF_QUEUE: %u\n", dev->dev_cur_ordered_id, |
| 1748 | cmd->se_ordered_id); |
Nicholas Bellinger | e66ecd5 | 2011-05-19 20:19:14 -0700 | [diff] [blame] | 1749 | } else if (cmd->sam_task_attr == MSG_ORDERED_TAG) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1750 | atomic_dec(&dev->dev_ordered_sync); |
| 1751 | smp_mb__after_atomic_dec(); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1752 | |
| 1753 | dev->dev_cur_ordered_id++; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1754 | pr_debug("Incremented dev_cur_ordered_id: %u for ORDERED:" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1755 | " %u\n", dev->dev_cur_ordered_id, cmd->se_ordered_id); |
| 1756 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1757 | |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 1758 | target_restart_delayed_cmds(dev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1759 | } |
| 1760 | |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 1761 | static void transport_complete_qf(struct se_cmd *cmd) |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1762 | { |
| 1763 | int ret = 0; |
| 1764 | |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1765 | transport_complete_task_attr(cmd); |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 1766 | |
| 1767 | if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) { |
| 1768 | ret = cmd->se_tfo->queue_status(cmd); |
| 1769 | if (ret) |
| 1770 | goto out; |
| 1771 | } |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1772 | |
| 1773 | switch (cmd->data_direction) { |
| 1774 | case DMA_FROM_DEVICE: |
| 1775 | ret = cmd->se_tfo->queue_data_in(cmd); |
| 1776 | break; |
| 1777 | case DMA_TO_DEVICE: |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 1778 | if (cmd->t_bidi_data_sg) { |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1779 | ret = cmd->se_tfo->queue_data_in(cmd); |
| 1780 | if (ret < 0) |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 1781 | break; |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1782 | } |
| 1783 | /* Fall through for DMA_TO_DEVICE */ |
| 1784 | case DMA_NONE: |
| 1785 | ret = cmd->se_tfo->queue_status(cmd); |
| 1786 | break; |
| 1787 | default: |
| 1788 | break; |
| 1789 | } |
| 1790 | |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 1791 | out: |
| 1792 | if (ret < 0) { |
| 1793 | transport_handle_queue_full(cmd, cmd->se_dev); |
| 1794 | return; |
| 1795 | } |
| 1796 | transport_lun_remove_cmd(cmd); |
| 1797 | transport_cmd_check_stop_to_fabric(cmd); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1798 | } |
| 1799 | |
| 1800 | static void transport_handle_queue_full( |
| 1801 | struct se_cmd *cmd, |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 1802 | struct se_device *dev) |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1803 | { |
| 1804 | spin_lock_irq(&dev->qf_cmd_lock); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1805 | list_add_tail(&cmd->se_qf_node, &cmd->se_dev->qf_cmd_list); |
| 1806 | atomic_inc(&dev->dev_qf_count); |
| 1807 | smp_mb__after_atomic_inc(); |
| 1808 | spin_unlock_irq(&cmd->se_dev->qf_cmd_lock); |
| 1809 | |
| 1810 | schedule_work(&cmd->se_dev->qf_work_queue); |
| 1811 | } |
| 1812 | |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 1813 | static void target_complete_ok_work(struct work_struct *work) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1814 | { |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 1815 | struct se_cmd *cmd = container_of(work, struct se_cmd, work); |
Paolo Bonzini | 27a2709 | 2012-09-05 17:09:14 +0200 | [diff] [blame] | 1816 | int ret; |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 1817 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1818 | /* |
| 1819 | * Check if we need to move delayed/dormant tasks from cmds on the |
| 1820 | * delayed execution list after a HEAD_OF_QUEUE or ORDERED Task |
| 1821 | * Attribute. |
| 1822 | */ |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1823 | transport_complete_task_attr(cmd); |
| 1824 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1825 | /* |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1826 | * Check to schedule QUEUE_FULL work, or execute an existing |
| 1827 | * cmd->transport_qf_callback() |
| 1828 | */ |
| 1829 | if (atomic_read(&cmd->se_dev->dev_qf_count) != 0) |
| 1830 | schedule_work(&cmd->se_dev->qf_work_queue); |
| 1831 | |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1832 | /* |
Paolo Bonzini | d5829ea | 2012-09-05 17:09:15 +0200 | [diff] [blame] | 1833 | * Check if we need to send a sense buffer from |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1834 | * the struct se_cmd in question. |
| 1835 | */ |
| 1836 | if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) { |
Paolo Bonzini | 27a2709 | 2012-09-05 17:09:14 +0200 | [diff] [blame] | 1837 | WARN_ON(!cmd->scsi_status); |
Paolo Bonzini | 27a2709 | 2012-09-05 17:09:14 +0200 | [diff] [blame] | 1838 | ret = transport_send_check_condition_and_sense( |
| 1839 | cmd, 0, 1); |
| 1840 | if (ret == -EAGAIN || ret == -ENOMEM) |
| 1841 | goto queue_full; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1842 | |
Paolo Bonzini | 27a2709 | 2012-09-05 17:09:14 +0200 | [diff] [blame] | 1843 | transport_lun_remove_cmd(cmd); |
| 1844 | transport_cmd_check_stop_to_fabric(cmd); |
| 1845 | return; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1846 | } |
| 1847 | /* |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 1848 | * Check for a callback, used by amongst other things |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1849 | * XDWRITE_READ_10 emulation. |
| 1850 | */ |
| 1851 | if (cmd->transport_complete_callback) |
| 1852 | cmd->transport_complete_callback(cmd); |
| 1853 | |
| 1854 | switch (cmd->data_direction) { |
| 1855 | case DMA_FROM_DEVICE: |
| 1856 | spin_lock(&cmd->se_lun->lun_sep_lock); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1857 | if (cmd->se_lun->lun_sep) { |
| 1858 | cmd->se_lun->lun_sep->sep_stats.tx_data_octets += |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1859 | cmd->data_length; |
| 1860 | } |
| 1861 | spin_unlock(&cmd->se_lun->lun_sep_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1862 | |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1863 | ret = cmd->se_tfo->queue_data_in(cmd); |
Nicholas Bellinger | f147abb | 2011-10-25 23:57:41 -0700 | [diff] [blame] | 1864 | if (ret == -EAGAIN || ret == -ENOMEM) |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1865 | goto queue_full; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1866 | break; |
| 1867 | case DMA_TO_DEVICE: |
| 1868 | spin_lock(&cmd->se_lun->lun_sep_lock); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1869 | if (cmd->se_lun->lun_sep) { |
| 1870 | cmd->se_lun->lun_sep->sep_stats.rx_data_octets += |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1871 | cmd->data_length; |
| 1872 | } |
| 1873 | spin_unlock(&cmd->se_lun->lun_sep_lock); |
| 1874 | /* |
| 1875 | * Check if we need to send READ payload for BIDI-COMMAND |
| 1876 | */ |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 1877 | if (cmd->t_bidi_data_sg) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1878 | spin_lock(&cmd->se_lun->lun_sep_lock); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1879 | if (cmd->se_lun->lun_sep) { |
| 1880 | cmd->se_lun->lun_sep->sep_stats.tx_data_octets += |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1881 | cmd->data_length; |
| 1882 | } |
| 1883 | spin_unlock(&cmd->se_lun->lun_sep_lock); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1884 | ret = cmd->se_tfo->queue_data_in(cmd); |
Nicholas Bellinger | f147abb | 2011-10-25 23:57:41 -0700 | [diff] [blame] | 1885 | if (ret == -EAGAIN || ret == -ENOMEM) |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1886 | goto queue_full; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1887 | break; |
| 1888 | } |
| 1889 | /* Fall through for DMA_TO_DEVICE */ |
| 1890 | case DMA_NONE: |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1891 | ret = cmd->se_tfo->queue_status(cmd); |
Nicholas Bellinger | f147abb | 2011-10-25 23:57:41 -0700 | [diff] [blame] | 1892 | if (ret == -EAGAIN || ret == -ENOMEM) |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1893 | goto queue_full; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1894 | break; |
| 1895 | default: |
| 1896 | break; |
| 1897 | } |
| 1898 | |
| 1899 | transport_lun_remove_cmd(cmd); |
| 1900 | transport_cmd_check_stop_to_fabric(cmd); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1901 | return; |
| 1902 | |
| 1903 | queue_full: |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1904 | pr_debug("Handling complete_ok QUEUE_FULL: se_cmd: %p," |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1905 | " data_direction: %d\n", cmd, cmd->data_direction); |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 1906 | cmd->t_state = TRANSPORT_COMPLETE_QF_OK; |
| 1907 | transport_handle_queue_full(cmd, cmd->se_dev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1908 | } |
| 1909 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1910 | static inline void transport_free_sgl(struct scatterlist *sgl, int nents) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1911 | { |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 1912 | struct scatterlist *sg; |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 1913 | int count; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1914 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1915 | for_each_sg(sgl, sg, nents, count) |
| 1916 | __free_page(sg_page(sg)); |
| 1917 | |
| 1918 | kfree(sgl); |
| 1919 | } |
| 1920 | |
| 1921 | static inline void transport_free_pages(struct se_cmd *cmd) |
| 1922 | { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1923 | if (cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1924 | return; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1925 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1926 | transport_free_sgl(cmd->t_data_sg, cmd->t_data_nents); |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 1927 | cmd->t_data_sg = NULL; |
| 1928 | cmd->t_data_nents = 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1929 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1930 | 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] | 1931 | cmd->t_bidi_data_sg = NULL; |
| 1932 | cmd->t_bidi_data_nents = 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1933 | } |
| 1934 | |
Christoph Hellwig | d3df782 | 2011-09-13 23:08:32 +0200 | [diff] [blame] | 1935 | /** |
Christoph Hellwig | e26d99a | 2011-11-14 12:30:30 -0500 | [diff] [blame] | 1936 | * transport_release_cmd - free a command |
| 1937 | * @cmd: command to free |
| 1938 | * |
| 1939 | * This routine unconditionally frees a command, and reference counting |
| 1940 | * or list removal must be done in the caller. |
| 1941 | */ |
| 1942 | static void transport_release_cmd(struct se_cmd *cmd) |
| 1943 | { |
| 1944 | BUG_ON(!cmd->se_tfo); |
| 1945 | |
Andy Grover | c8e31f2 | 2012-01-19 13:39:17 -0800 | [diff] [blame] | 1946 | if (cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) |
Christoph Hellwig | e26d99a | 2011-11-14 12:30:30 -0500 | [diff] [blame] | 1947 | core_tmr_release_req(cmd->se_tmr_req); |
| 1948 | if (cmd->t_task_cdb != cmd->__t_task_cdb) |
| 1949 | kfree(cmd->t_task_cdb); |
| 1950 | /* |
Nicholas Bellinger | 7481deb | 2011-11-12 00:32:17 -0800 | [diff] [blame] | 1951 | * If this cmd has been setup with target_get_sess_cmd(), drop |
| 1952 | * the kref and call ->release_cmd() in kref callback. |
Christoph Hellwig | e26d99a | 2011-11-14 12:30:30 -0500 | [diff] [blame] | 1953 | */ |
Nicholas Bellinger | 7481deb | 2011-11-12 00:32:17 -0800 | [diff] [blame] | 1954 | if (cmd->check_release != 0) { |
| 1955 | target_put_sess_cmd(cmd->se_sess, cmd); |
| 1956 | return; |
| 1957 | } |
Christoph Hellwig | e26d99a | 2011-11-14 12:30:30 -0500 | [diff] [blame] | 1958 | cmd->se_tfo->release_cmd(cmd); |
| 1959 | } |
| 1960 | |
| 1961 | /** |
Christoph Hellwig | d3df782 | 2011-09-13 23:08:32 +0200 | [diff] [blame] | 1962 | * transport_put_cmd - release a reference to a command |
| 1963 | * @cmd: command to release |
| 1964 | * |
| 1965 | * This routine releases our reference to the command and frees it if possible. |
| 1966 | */ |
Nicholas Bellinger | 39c05f3 | 2011-10-08 13:59:52 -0700 | [diff] [blame] | 1967 | static void transport_put_cmd(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1968 | { |
| 1969 | unsigned long flags; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1970 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1971 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
Christoph Hellwig | 4911e3c | 2011-09-13 23:08:42 +0200 | [diff] [blame] | 1972 | if (atomic_read(&cmd->t_fe_count)) { |
| 1973 | if (!atomic_dec_and_test(&cmd->t_fe_count)) |
| 1974 | goto out_busy; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1975 | } |
Christoph Hellwig | 4911e3c | 2011-09-13 23:08:42 +0200 | [diff] [blame] | 1976 | |
Christoph Hellwig | 7d680f3 | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 1977 | if (cmd->transport_state & CMD_T_DEV_ACTIVE) { |
| 1978 | cmd->transport_state &= ~CMD_T_DEV_ACTIVE; |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 1979 | target_remove_from_state_list(cmd); |
Christoph Hellwig | 4911e3c | 2011-09-13 23:08:42 +0200 | [diff] [blame] | 1980 | } |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1981 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1982 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1983 | transport_free_pages(cmd); |
Christoph Hellwig | 31afc39 | 2011-09-13 23:08:11 +0200 | [diff] [blame] | 1984 | transport_release_cmd(cmd); |
Nicholas Bellinger | 39c05f3 | 2011-10-08 13:59:52 -0700 | [diff] [blame] | 1985 | return; |
Christoph Hellwig | 4911e3c | 2011-09-13 23:08:42 +0200 | [diff] [blame] | 1986 | out_busy: |
| 1987 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1988 | } |
| 1989 | |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 1990 | void *transport_kmap_data_sg(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1991 | { |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 1992 | struct scatterlist *sg = cmd->t_data_sg; |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 1993 | struct page **pages; |
| 1994 | int i; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1995 | |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 1996 | /* |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 1997 | * We need to take into account a possible offset here for fabrics like |
| 1998 | * tcm_loop who may be using a contig buffer from the SCSI midlayer for |
| 1999 | * control CDBs passed as SGLs via transport_generic_map_mem_to_cmd() |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 2000 | */ |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 2001 | if (!cmd->t_data_nents) |
| 2002 | return NULL; |
Paolo Bonzini | 3717ef0 | 2012-09-07 17:30:35 +0200 | [diff] [blame] | 2003 | |
| 2004 | BUG_ON(!sg); |
| 2005 | if (cmd->t_data_nents == 1) |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 2006 | return kmap(sg_page(sg)) + sg->offset; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 2007 | |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 2008 | /* >1 page. use vmap */ |
| 2009 | pages = kmalloc(sizeof(*pages) * cmd->t_data_nents, GFP_KERNEL); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2010 | if (!pages) |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 2011 | return NULL; |
| 2012 | |
| 2013 | /* convert sg[] to pages[] */ |
| 2014 | for_each_sg(cmd->t_data_sg, sg, cmd->t_data_nents, i) { |
| 2015 | pages[i] = sg_page(sg); |
| 2016 | } |
| 2017 | |
| 2018 | cmd->t_data_vmap = vmap(pages, cmd->t_data_nents, VM_MAP, PAGE_KERNEL); |
| 2019 | kfree(pages); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2020 | if (!cmd->t_data_vmap) |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 2021 | return NULL; |
| 2022 | |
| 2023 | return cmd->t_data_vmap + cmd->t_data_sg[0].offset; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 2024 | } |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 2025 | EXPORT_SYMBOL(transport_kmap_data_sg); |
| 2026 | |
| 2027 | void transport_kunmap_data_sg(struct se_cmd *cmd) |
| 2028 | { |
Andy Grover | a1edf9c | 2012-02-09 12:18:06 -0800 | [diff] [blame] | 2029 | if (!cmd->t_data_nents) { |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 2030 | return; |
Andy Grover | a1edf9c | 2012-02-09 12:18:06 -0800 | [diff] [blame] | 2031 | } else if (cmd->t_data_nents == 1) { |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 2032 | kunmap(sg_page(cmd->t_data_sg)); |
Andy Grover | a1edf9c | 2012-02-09 12:18:06 -0800 | [diff] [blame] | 2033 | return; |
| 2034 | } |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 2035 | |
| 2036 | vunmap(cmd->t_data_vmap); |
| 2037 | cmd->t_data_vmap = NULL; |
| 2038 | } |
| 2039 | EXPORT_SYMBOL(transport_kunmap_data_sg); |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 2040 | |
| 2041 | static int |
| 2042 | transport_generic_get_mem(struct se_cmd *cmd) |
| 2043 | { |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2044 | u32 length = cmd->data_length; |
| 2045 | unsigned int nents; |
| 2046 | struct page *page; |
roland@purestorage.com | 9db9da3 | 2012-01-04 15:59:58 -0800 | [diff] [blame] | 2047 | gfp_t zero_flag; |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2048 | int i = 0; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 2049 | |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2050 | nents = DIV_ROUND_UP(length, PAGE_SIZE); |
| 2051 | cmd->t_data_sg = kmalloc(sizeof(struct scatterlist) * nents, GFP_KERNEL); |
| 2052 | if (!cmd->t_data_sg) |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2053 | return -ENOMEM; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2054 | |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2055 | cmd->t_data_nents = nents; |
| 2056 | sg_init_table(cmd->t_data_sg, nents); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2057 | |
Christoph Hellwig | 64f1db3 | 2012-05-20 11:59:11 -0400 | [diff] [blame] | 2058 | zero_flag = cmd->se_cmd_flags & SCF_SCSI_DATA_CDB ? 0 : __GFP_ZERO; |
roland@purestorage.com | 9db9da3 | 2012-01-04 15:59:58 -0800 | [diff] [blame] | 2059 | |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2060 | while (length) { |
| 2061 | u32 page_len = min_t(u32, length, PAGE_SIZE); |
roland@purestorage.com | 9db9da3 | 2012-01-04 15:59:58 -0800 | [diff] [blame] | 2062 | page = alloc_page(GFP_KERNEL | zero_flag); |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2063 | if (!page) |
| 2064 | goto out; |
| 2065 | |
| 2066 | sg_set_page(&cmd->t_data_sg[i], page, page_len, 0); |
| 2067 | length -= page_len; |
| 2068 | i++; |
| 2069 | } |
| 2070 | return 0; |
| 2071 | |
| 2072 | out: |
Yi Zou | d0e27c8 | 2012-08-14 16:06:43 -0700 | [diff] [blame] | 2073 | while (i > 0) { |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2074 | i--; |
Yi Zou | d0e27c8 | 2012-08-14 16:06:43 -0700 | [diff] [blame] | 2075 | __free_page(sg_page(&cmd->t_data_sg[i])); |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2076 | } |
| 2077 | kfree(cmd->t_data_sg); |
| 2078 | cmd->t_data_sg = NULL; |
| 2079 | return -ENOMEM; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2080 | } |
| 2081 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2082 | /* |
Andy Grover | b16a35b | 2012-04-03 15:51:21 -0700 | [diff] [blame] | 2083 | * Allocate any required resources to execute the command. For writes we |
| 2084 | * might not have the payload yet, so notify the fabric via a call to |
| 2085 | * ->write_pending instead. Otherwise place it on the execution queue. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2086 | */ |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2087 | sense_reason_t |
| 2088 | transport_generic_new_cmd(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2089 | { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2090 | int ret = 0; |
| 2091 | |
| 2092 | /* |
| 2093 | * Determine is the TCM fabric module has already allocated physical |
| 2094 | * memory, and is directly calling transport_generic_map_mem_to_cmd() |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2095 | * beforehand. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2096 | */ |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2097 | if (!(cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) && |
| 2098 | cmd->data_length) { |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 2099 | ret = transport_generic_get_mem(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2100 | if (ret < 0) |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2101 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2102 | } |
Christoph Hellwig | da0f761 | 2011-10-18 06:57:01 -0400 | [diff] [blame] | 2103 | |
Christoph Hellwig | 4101f0a | 2012-04-24 00:25:03 -0400 | [diff] [blame] | 2104 | atomic_inc(&cmd->t_fe_count); |
Christoph Hellwig | 4101f0a | 2012-04-24 00:25:03 -0400 | [diff] [blame] | 2105 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2106 | /* |
Christoph Hellwig | c3196f0 | 2012-07-08 15:58:41 -0400 | [diff] [blame] | 2107 | * If this command is not a write we can execute it right here, |
| 2108 | * for write buffers we need to notify the fabric driver first |
| 2109 | * and let it call back once the write buffers are ready. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2110 | */ |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 2111 | target_add_to_state_list(cmd); |
Christoph Hellwig | c3196f0 | 2012-07-08 15:58:41 -0400 | [diff] [blame] | 2112 | if (cmd->data_direction != DMA_TO_DEVICE) { |
| 2113 | target_execute_cmd(cmd); |
| 2114 | return 0; |
| 2115 | } |
| 2116 | |
| 2117 | spin_lock_irq(&cmd->t_state_lock); |
| 2118 | cmd->t_state = TRANSPORT_WRITE_PENDING; |
| 2119 | spin_unlock_irq(&cmd->t_state_lock); |
| 2120 | |
| 2121 | transport_cmd_check_stop(cmd, false); |
| 2122 | |
| 2123 | ret = cmd->se_tfo->write_pending(cmd); |
| 2124 | if (ret == -EAGAIN || ret == -ENOMEM) |
| 2125 | goto queue_full; |
| 2126 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2127 | /* fabric drivers should only return -EAGAIN or -ENOMEM as error */ |
| 2128 | WARN_ON(ret); |
Christoph Hellwig | da0f761 | 2011-10-18 06:57:01 -0400 | [diff] [blame] | 2129 | |
Nicholas Bellinger | b69c1fc | 2012-11-06 15:43:53 -0800 | [diff] [blame^] | 2130 | return (!ret) ? 0 : TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2131 | |
Christoph Hellwig | c3196f0 | 2012-07-08 15:58:41 -0400 | [diff] [blame] | 2132 | queue_full: |
| 2133 | pr_debug("Handling write_pending QUEUE__FULL: se_cmd: %p\n", cmd); |
| 2134 | cmd->t_state = TRANSPORT_COMPLETE_QF_WP; |
| 2135 | transport_handle_queue_full(cmd, cmd->se_dev); |
| 2136 | return 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2137 | } |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2138 | EXPORT_SYMBOL(transport_generic_new_cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2139 | |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 2140 | static void transport_write_pending_qf(struct se_cmd *cmd) |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 2141 | { |
Nicholas Bellinger | f147abb | 2011-10-25 23:57:41 -0700 | [diff] [blame] | 2142 | int ret; |
| 2143 | |
| 2144 | ret = cmd->se_tfo->write_pending(cmd); |
| 2145 | if (ret == -EAGAIN || ret == -ENOMEM) { |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 2146 | pr_debug("Handling write_pending QUEUE__FULL: se_cmd: %p\n", |
| 2147 | cmd); |
| 2148 | transport_handle_queue_full(cmd, cmd->se_dev); |
| 2149 | } |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 2150 | } |
| 2151 | |
Nicholas Bellinger | 39c05f3 | 2011-10-08 13:59:52 -0700 | [diff] [blame] | 2152 | void transport_generic_free_cmd(struct se_cmd *cmd, int wait_for_tasks) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2153 | { |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2154 | if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD)) { |
Andy Grover | c8e31f2 | 2012-01-19 13:39:17 -0800 | [diff] [blame] | 2155 | if (wait_for_tasks && (cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2156 | transport_wait_for_tasks(cmd); |
| 2157 | |
Christoph Hellwig | 3546297 | 2011-05-31 23:56:57 -0400 | [diff] [blame] | 2158 | transport_release_cmd(cmd); |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2159 | } else { |
| 2160 | if (wait_for_tasks) |
| 2161 | transport_wait_for_tasks(cmd); |
| 2162 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2163 | core_dec_lacl_count(cmd->se_sess->se_node_acl, cmd); |
| 2164 | |
Christoph Hellwig | 82f1c8a | 2011-09-13 23:09:01 +0200 | [diff] [blame] | 2165 | if (cmd->se_lun) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2166 | transport_lun_remove_cmd(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2167 | |
Nicholas Bellinger | 39c05f3 | 2011-10-08 13:59:52 -0700 | [diff] [blame] | 2168 | transport_put_cmd(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2169 | } |
| 2170 | } |
| 2171 | EXPORT_SYMBOL(transport_generic_free_cmd); |
| 2172 | |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2173 | /* target_get_sess_cmd - Add command to active ->sess_cmd_list |
| 2174 | * @se_sess: session to reference |
| 2175 | * @se_cmd: command descriptor to add |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 2176 | * @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] | 2177 | */ |
Roland Dreier | bc187ea | 2012-07-16 11:04:40 -0700 | [diff] [blame] | 2178 | static int target_get_sess_cmd(struct se_session *se_sess, struct se_cmd *se_cmd, |
| 2179 | bool ack_kref) |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2180 | { |
| 2181 | unsigned long flags; |
Roland Dreier | bc187ea | 2012-07-16 11:04:40 -0700 | [diff] [blame] | 2182 | int ret = 0; |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2183 | |
Nicholas Bellinger | 7481deb | 2011-11-12 00:32:17 -0800 | [diff] [blame] | 2184 | kref_init(&se_cmd->cmd_kref); |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 2185 | /* |
| 2186 | * Add a second kref if the fabric caller is expecting to handle |
| 2187 | * fabric acknowledgement that requires two target_put_sess_cmd() |
| 2188 | * invocations before se_cmd descriptor release. |
| 2189 | */ |
Nicholas Bellinger | 8671556 | 2012-02-13 01:07:22 -0800 | [diff] [blame] | 2190 | if (ack_kref == true) { |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 2191 | kref_get(&se_cmd->cmd_kref); |
Nicholas Bellinger | 8671556 | 2012-02-13 01:07:22 -0800 | [diff] [blame] | 2192 | se_cmd->se_cmd_flags |= SCF_ACK_KREF; |
| 2193 | } |
Nicholas Bellinger | 7481deb | 2011-11-12 00:32:17 -0800 | [diff] [blame] | 2194 | |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2195 | spin_lock_irqsave(&se_sess->sess_cmd_lock, flags); |
Roland Dreier | bc187ea | 2012-07-16 11:04:40 -0700 | [diff] [blame] | 2196 | if (se_sess->sess_tearing_down) { |
| 2197 | ret = -ESHUTDOWN; |
| 2198 | goto out; |
| 2199 | } |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2200 | list_add_tail(&se_cmd->se_cmd_list, &se_sess->sess_cmd_list); |
| 2201 | se_cmd->check_release = 1; |
Roland Dreier | bc187ea | 2012-07-16 11:04:40 -0700 | [diff] [blame] | 2202 | |
| 2203 | out: |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2204 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); |
Roland Dreier | bc187ea | 2012-07-16 11:04:40 -0700 | [diff] [blame] | 2205 | return ret; |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2206 | } |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2207 | |
Nicholas Bellinger | 7481deb | 2011-11-12 00:32:17 -0800 | [diff] [blame] | 2208 | static void target_release_cmd_kref(struct kref *kref) |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2209 | { |
Nicholas Bellinger | 7481deb | 2011-11-12 00:32:17 -0800 | [diff] [blame] | 2210 | struct se_cmd *se_cmd = container_of(kref, struct se_cmd, cmd_kref); |
| 2211 | struct se_session *se_sess = se_cmd->se_sess; |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2212 | unsigned long flags; |
| 2213 | |
| 2214 | spin_lock_irqsave(&se_sess->sess_cmd_lock, flags); |
| 2215 | if (list_empty(&se_cmd->se_cmd_list)) { |
| 2216 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); |
Nicholas Bellinger | ffc32d5 | 2012-02-13 02:35:01 -0800 | [diff] [blame] | 2217 | se_cmd->se_tfo->release_cmd(se_cmd); |
Nicholas Bellinger | 7481deb | 2011-11-12 00:32:17 -0800 | [diff] [blame] | 2218 | return; |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2219 | } |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2220 | if (se_sess->sess_tearing_down && se_cmd->cmd_wait_set) { |
| 2221 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); |
| 2222 | complete(&se_cmd->cmd_wait_comp); |
Nicholas Bellinger | 7481deb | 2011-11-12 00:32:17 -0800 | [diff] [blame] | 2223 | return; |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2224 | } |
| 2225 | list_del(&se_cmd->se_cmd_list); |
| 2226 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); |
| 2227 | |
Nicholas Bellinger | 7481deb | 2011-11-12 00:32:17 -0800 | [diff] [blame] | 2228 | se_cmd->se_tfo->release_cmd(se_cmd); |
| 2229 | } |
| 2230 | |
| 2231 | /* target_put_sess_cmd - Check for active I/O shutdown via kref_put |
| 2232 | * @se_sess: session to reference |
| 2233 | * @se_cmd: command descriptor to drop |
| 2234 | */ |
| 2235 | int target_put_sess_cmd(struct se_session *se_sess, struct se_cmd *se_cmd) |
| 2236 | { |
| 2237 | return kref_put(&se_cmd->cmd_kref, target_release_cmd_kref); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2238 | } |
| 2239 | EXPORT_SYMBOL(target_put_sess_cmd); |
| 2240 | |
Roland Dreier | 1c7b13f | 2012-07-16 11:04:42 -0700 | [diff] [blame] | 2241 | /* target_sess_cmd_list_set_waiting - Flag all commands in |
| 2242 | * sess_cmd_list to complete cmd_wait_comp. Set |
| 2243 | * sess_tearing_down so no more commands are queued. |
| 2244 | * @se_sess: session to flag |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2245 | */ |
Roland Dreier | 1c7b13f | 2012-07-16 11:04:42 -0700 | [diff] [blame] | 2246 | void target_sess_cmd_list_set_waiting(struct se_session *se_sess) |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2247 | { |
| 2248 | struct se_cmd *se_cmd; |
| 2249 | unsigned long flags; |
| 2250 | |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2251 | spin_lock_irqsave(&se_sess->sess_cmd_lock, flags); |
Roland Dreier | 1c7b13f | 2012-07-16 11:04:42 -0700 | [diff] [blame] | 2252 | |
| 2253 | WARN_ON(se_sess->sess_tearing_down); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2254 | se_sess->sess_tearing_down = 1; |
| 2255 | |
Roland Dreier | 1c7b13f | 2012-07-16 11:04:42 -0700 | [diff] [blame] | 2256 | list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2257 | se_cmd->cmd_wait_set = 1; |
| 2258 | |
| 2259 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); |
| 2260 | } |
Roland Dreier | 1c7b13f | 2012-07-16 11:04:42 -0700 | [diff] [blame] | 2261 | EXPORT_SYMBOL(target_sess_cmd_list_set_waiting); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2262 | |
| 2263 | /* target_wait_for_sess_cmds - Wait for outstanding descriptors |
| 2264 | * @se_sess: session to wait for active I/O |
| 2265 | * @wait_for_tasks: Make extra transport_wait_for_tasks call |
| 2266 | */ |
| 2267 | void target_wait_for_sess_cmds( |
| 2268 | struct se_session *se_sess, |
| 2269 | int wait_for_tasks) |
| 2270 | { |
| 2271 | struct se_cmd *se_cmd, *tmp_cmd; |
| 2272 | bool rc = false; |
| 2273 | |
| 2274 | list_for_each_entry_safe(se_cmd, tmp_cmd, |
Roland Dreier | 1c7b13f | 2012-07-16 11:04:42 -0700 | [diff] [blame] | 2275 | &se_sess->sess_cmd_list, se_cmd_list) { |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2276 | list_del(&se_cmd->se_cmd_list); |
| 2277 | |
| 2278 | pr_debug("Waiting for se_cmd: %p t_state: %d, fabric state:" |
| 2279 | " %d\n", se_cmd, se_cmd->t_state, |
| 2280 | se_cmd->se_tfo->get_cmd_state(se_cmd)); |
| 2281 | |
| 2282 | if (wait_for_tasks) { |
| 2283 | pr_debug("Calling transport_wait_for_tasks se_cmd: %p t_state: %d," |
| 2284 | " fabric state: %d\n", se_cmd, se_cmd->t_state, |
| 2285 | se_cmd->se_tfo->get_cmd_state(se_cmd)); |
| 2286 | |
| 2287 | rc = transport_wait_for_tasks(se_cmd); |
| 2288 | |
| 2289 | pr_debug("After transport_wait_for_tasks se_cmd: %p t_state: %d," |
| 2290 | " fabric state: %d\n", se_cmd, se_cmd->t_state, |
| 2291 | se_cmd->se_tfo->get_cmd_state(se_cmd)); |
| 2292 | } |
| 2293 | |
| 2294 | if (!rc) { |
| 2295 | wait_for_completion(&se_cmd->cmd_wait_comp); |
| 2296 | pr_debug("After cmd_wait_comp: se_cmd: %p t_state: %d" |
| 2297 | " fabric state: %d\n", se_cmd, se_cmd->t_state, |
| 2298 | se_cmd->se_tfo->get_cmd_state(se_cmd)); |
| 2299 | } |
| 2300 | |
| 2301 | se_cmd->se_tfo->release_cmd(se_cmd); |
| 2302 | } |
| 2303 | } |
| 2304 | EXPORT_SYMBOL(target_wait_for_sess_cmds); |
| 2305 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2306 | /* transport_lun_wait_for_tasks(): |
| 2307 | * |
| 2308 | * Called from ConfigFS context to stop the passed struct se_cmd to allow |
| 2309 | * an struct se_lun to be successfully shutdown. |
| 2310 | */ |
| 2311 | static int transport_lun_wait_for_tasks(struct se_cmd *cmd, struct se_lun *lun) |
| 2312 | { |
| 2313 | unsigned long flags; |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 2314 | int ret = 0; |
| 2315 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2316 | /* |
| 2317 | * If the frontend has already requested this struct se_cmd to |
| 2318 | * be stopped, we can safely ignore this struct se_cmd. |
| 2319 | */ |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2320 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
Christoph Hellwig | 7d680f3 | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 2321 | if (cmd->transport_state & CMD_T_STOP) { |
| 2322 | cmd->transport_state &= ~CMD_T_LUN_STOP; |
| 2323 | |
| 2324 | pr_debug("ConfigFS ITT[0x%08x] - CMD_T_STOP, skipping\n", |
| 2325 | cmd->se_tfo->get_task_tag(cmd)); |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2326 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Christoph Hellwig | f7113a4 | 2012-07-08 15:58:38 -0400 | [diff] [blame] | 2327 | transport_cmd_check_stop(cmd, false); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2328 | return -EPERM; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2329 | } |
Christoph Hellwig | 7d680f3 | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 2330 | cmd->transport_state |= CMD_T_LUN_FE_STOP; |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2331 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2332 | |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 2333 | // XXX: audit task_flags checks. |
| 2334 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
| 2335 | if ((cmd->transport_state & CMD_T_BUSY) && |
| 2336 | (cmd->transport_state & CMD_T_SENT)) { |
| 2337 | if (!target_stop_cmd(cmd, &flags)) |
| 2338 | ret++; |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 2339 | } |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 2340 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2341 | |
Christoph Hellwig | 785fdf7 | 2012-04-24 00:25:04 -0400 | [diff] [blame] | 2342 | pr_debug("ConfigFS: cmd: %p stop tasks ret:" |
| 2343 | " %d\n", cmd, ret); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2344 | if (!ret) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2345 | pr_debug("ConfigFS: ITT[0x%08x] - stopping cmd....\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2346 | cmd->se_tfo->get_task_tag(cmd)); |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2347 | wait_for_completion(&cmd->transport_lun_stop_comp); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2348 | pr_debug("ConfigFS: ITT[0x%08x] - stopped cmd....\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2349 | cmd->se_tfo->get_task_tag(cmd)); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2350 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2351 | |
| 2352 | return 0; |
| 2353 | } |
| 2354 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2355 | static void __transport_clear_lun_from_sessions(struct se_lun *lun) |
| 2356 | { |
| 2357 | struct se_cmd *cmd = NULL; |
| 2358 | unsigned long lun_flags, cmd_flags; |
| 2359 | /* |
| 2360 | * Do exception processing and return CHECK_CONDITION status to the |
| 2361 | * Initiator Port. |
| 2362 | */ |
| 2363 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 2364 | while (!list_empty(&lun->lun_cmd_list)) { |
| 2365 | cmd = list_first_entry(&lun->lun_cmd_list, |
| 2366 | struct se_cmd, se_lun_node); |
Christoph Hellwig | 3d26fea | 2011-12-21 14:14:05 -0500 | [diff] [blame] | 2367 | list_del_init(&cmd->se_lun_node); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2368 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2369 | spin_lock(&cmd->t_state_lock); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2370 | pr_debug("SE_LUN[%d] - Setting cmd->transport" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2371 | "_lun_stop for ITT: 0x%08x\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2372 | cmd->se_lun->unpacked_lun, |
| 2373 | cmd->se_tfo->get_task_tag(cmd)); |
Christoph Hellwig | 7d680f3 | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 2374 | cmd->transport_state |= CMD_T_LUN_STOP; |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2375 | spin_unlock(&cmd->t_state_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2376 | |
| 2377 | spin_unlock_irqrestore(&lun->lun_cmd_lock, lun_flags); |
| 2378 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2379 | if (!cmd->se_lun) { |
| 2380 | pr_err("ITT: 0x%08x, [i,t]_state: %u/%u\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2381 | cmd->se_tfo->get_task_tag(cmd), |
| 2382 | cmd->se_tfo->get_cmd_state(cmd), cmd->t_state); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2383 | BUG(); |
| 2384 | } |
| 2385 | /* |
| 2386 | * If the Storage engine still owns the iscsi_cmd_t, determine |
| 2387 | * and/or stop its context. |
| 2388 | */ |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2389 | pr_debug("SE_LUN[%d] - ITT: 0x%08x before transport" |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2390 | "_lun_wait_for_tasks()\n", cmd->se_lun->unpacked_lun, |
| 2391 | cmd->se_tfo->get_task_tag(cmd)); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2392 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2393 | if (transport_lun_wait_for_tasks(cmd, cmd->se_lun) < 0) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2394 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); |
| 2395 | continue; |
| 2396 | } |
| 2397 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2398 | pr_debug("SE_LUN[%d] - ITT: 0x%08x after transport_lun" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2399 | "_wait_for_tasks(): SUCCESS\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2400 | cmd->se_lun->unpacked_lun, |
| 2401 | cmd->se_tfo->get_task_tag(cmd)); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2402 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2403 | spin_lock_irqsave(&cmd->t_state_lock, cmd_flags); |
Christoph Hellwig | 7d680f3 | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 2404 | if (!(cmd->transport_state & CMD_T_DEV_ACTIVE)) { |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2405 | spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2406 | goto check_cond; |
| 2407 | } |
Christoph Hellwig | 7d680f3 | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 2408 | cmd->transport_state &= ~CMD_T_DEV_ACTIVE; |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 2409 | target_remove_from_state_list(cmd); |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2410 | spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2411 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2412 | /* |
| 2413 | * The Storage engine stopped this struct se_cmd before it was |
| 2414 | * send to the fabric frontend for delivery back to the |
| 2415 | * Initiator Node. Return this SCSI CDB back with an |
| 2416 | * CHECK_CONDITION status. |
| 2417 | */ |
| 2418 | check_cond: |
| 2419 | transport_send_check_condition_and_sense(cmd, |
| 2420 | TCM_NON_EXISTENT_LUN, 0); |
| 2421 | /* |
| 2422 | * If the fabric frontend is waiting for this iscsi_cmd_t to |
| 2423 | * be released, notify the waiting thread now that LU has |
| 2424 | * finished accessing it. |
| 2425 | */ |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2426 | spin_lock_irqsave(&cmd->t_state_lock, cmd_flags); |
Christoph Hellwig | 7d680f3 | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 2427 | if (cmd->transport_state & CMD_T_LUN_FE_STOP) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2428 | pr_debug("SE_LUN[%d] - Detected FE stop for" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2429 | " struct se_cmd: %p ITT: 0x%08x\n", |
| 2430 | lun->unpacked_lun, |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2431 | cmd, cmd->se_tfo->get_task_tag(cmd)); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2432 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2433 | spin_unlock_irqrestore(&cmd->t_state_lock, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2434 | cmd_flags); |
Christoph Hellwig | f7113a4 | 2012-07-08 15:58:38 -0400 | [diff] [blame] | 2435 | transport_cmd_check_stop(cmd, false); |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2436 | complete(&cmd->transport_lun_fe_stop_comp); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2437 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); |
| 2438 | continue; |
| 2439 | } |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2440 | pr_debug("SE_LUN[%d] - ITT: 0x%08x finished processing\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2441 | lun->unpacked_lun, cmd->se_tfo->get_task_tag(cmd)); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2442 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2443 | spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2444 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); |
| 2445 | } |
| 2446 | spin_unlock_irqrestore(&lun->lun_cmd_lock, lun_flags); |
| 2447 | } |
| 2448 | |
| 2449 | static int transport_clear_lun_thread(void *p) |
| 2450 | { |
Jörn Engel | 8359cf4 | 2011-11-24 02:05:51 +0100 | [diff] [blame] | 2451 | struct se_lun *lun = p; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2452 | |
| 2453 | __transport_clear_lun_from_sessions(lun); |
| 2454 | complete(&lun->lun_shutdown_comp); |
| 2455 | |
| 2456 | return 0; |
| 2457 | } |
| 2458 | |
| 2459 | int transport_clear_lun_from_sessions(struct se_lun *lun) |
| 2460 | { |
| 2461 | struct task_struct *kt; |
| 2462 | |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 2463 | kt = kthread_run(transport_clear_lun_thread, lun, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2464 | "tcm_cl_%u", lun->unpacked_lun); |
| 2465 | if (IS_ERR(kt)) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2466 | pr_err("Unable to start clear_lun thread\n"); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2467 | return PTR_ERR(kt); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2468 | } |
| 2469 | wait_for_completion(&lun->lun_shutdown_comp); |
| 2470 | |
| 2471 | return 0; |
| 2472 | } |
| 2473 | |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2474 | /** |
| 2475 | * transport_wait_for_tasks - wait for completion to occur |
| 2476 | * @cmd: command to wait |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2477 | * |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2478 | * Called from frontend fabric context to wait for storage engine |
| 2479 | * to pause and/or release frontend generated struct se_cmd. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2480 | */ |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2481 | bool transport_wait_for_tasks(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2482 | { |
| 2483 | unsigned long flags; |
| 2484 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2485 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
Andy Grover | c8e31f2 | 2012-01-19 13:39:17 -0800 | [diff] [blame] | 2486 | if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD) && |
| 2487 | !(cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) { |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2488 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2489 | return false; |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2490 | } |
Christoph Hellwig | cb4f4d3 | 2012-05-20 11:59:10 -0400 | [diff] [blame] | 2491 | |
Andy Grover | c8e31f2 | 2012-01-19 13:39:17 -0800 | [diff] [blame] | 2492 | if (!(cmd->se_cmd_flags & SCF_SUPPORTED_SAM_OPCODE) && |
| 2493 | !(cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) { |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2494 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2495 | return false; |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2496 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2497 | /* |
| 2498 | * If we are already stopped due to an external event (ie: LUN shutdown) |
| 2499 | * sleep until the connection can have the passed struct se_cmd back. |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2500 | * The cmd->transport_lun_stopped_sem will be upped by |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2501 | * transport_clear_lun_from_sessions() once the ConfigFS context caller |
| 2502 | * has completed its operation on the struct se_cmd. |
| 2503 | */ |
Christoph Hellwig | 7d680f3 | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 2504 | if (cmd->transport_state & CMD_T_LUN_STOP) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2505 | pr_debug("wait_for_tasks: Stopping" |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2506 | " wait_for_completion(&cmd->t_tasktransport_lun_fe" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2507 | "_stop_comp); for ITT: 0x%08x\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2508 | cmd->se_tfo->get_task_tag(cmd)); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2509 | /* |
| 2510 | * There is a special case for WRITES where a FE exception + |
| 2511 | * LUN shutdown means ConfigFS context is still sleeping on |
| 2512 | * transport_lun_stop_comp in transport_lun_wait_for_tasks(). |
| 2513 | * We go ahead and up transport_lun_stop_comp just to be sure |
| 2514 | * here. |
| 2515 | */ |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2516 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
| 2517 | complete(&cmd->transport_lun_stop_comp); |
| 2518 | wait_for_completion(&cmd->transport_lun_fe_stop_comp); |
| 2519 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2520 | |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 2521 | target_remove_from_state_list(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2522 | /* |
| 2523 | * At this point, the frontend who was the originator of this |
| 2524 | * struct se_cmd, now owns the structure and can be released through |
| 2525 | * normal means below. |
| 2526 | */ |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2527 | pr_debug("wait_for_tasks: Stopped" |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2528 | " wait_for_completion(&cmd->t_tasktransport_lun_fe_" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2529 | "stop_comp); for ITT: 0x%08x\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2530 | cmd->se_tfo->get_task_tag(cmd)); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2531 | |
Christoph Hellwig | 7d680f3 | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 2532 | cmd->transport_state &= ~CMD_T_LUN_STOP; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2533 | } |
Christoph Hellwig | 7d680f3 | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 2534 | |
Nicholas Bellinger | 3d28934 | 2012-02-13 02:38:14 -0800 | [diff] [blame] | 2535 | if (!(cmd->transport_state & CMD_T_ACTIVE)) { |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2536 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2537 | return false; |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2538 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2539 | |
Christoph Hellwig | 7d680f3 | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 2540 | cmd->transport_state |= CMD_T_STOP; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2541 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2542 | pr_debug("wait_for_tasks: Stopping %p ITT: 0x%08x" |
Christoph Hellwig | 7d680f3 | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 2543 | " i_state: %d, t_state: %d, CMD_T_STOP\n", |
Christoph Hellwig | f2da9db | 2011-10-17 13:56:51 -0400 | [diff] [blame] | 2544 | cmd, cmd->se_tfo->get_task_tag(cmd), |
| 2545 | cmd->se_tfo->get_cmd_state(cmd), cmd->t_state); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2546 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2547 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2548 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2549 | wait_for_completion(&cmd->t_transport_stop_comp); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2550 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2551 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
Christoph Hellwig | 7d680f3 | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 2552 | cmd->transport_state &= ~(CMD_T_ACTIVE | CMD_T_STOP); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2553 | |
Masanari Iida | 35d1efe | 2012-08-16 22:43:13 +0900 | [diff] [blame] | 2554 | pr_debug("wait_for_tasks: Stopped wait_for_completion(" |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2555 | "&cmd->t_transport_stop_comp) for ITT: 0x%08x\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2556 | cmd->se_tfo->get_task_tag(cmd)); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2557 | |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2558 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2559 | |
| 2560 | return true; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2561 | } |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2562 | EXPORT_SYMBOL(transport_wait_for_tasks); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2563 | |
| 2564 | static int transport_get_sense_codes( |
| 2565 | struct se_cmd *cmd, |
| 2566 | u8 *asc, |
| 2567 | u8 *ascq) |
| 2568 | { |
| 2569 | *asc = cmd->scsi_asc; |
| 2570 | *ascq = cmd->scsi_ascq; |
| 2571 | |
| 2572 | return 0; |
| 2573 | } |
| 2574 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2575 | int |
| 2576 | transport_send_check_condition_and_sense(struct se_cmd *cmd, |
| 2577 | sense_reason_t reason, int from_transport) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2578 | { |
| 2579 | unsigned char *buffer = cmd->sense_buffer; |
| 2580 | unsigned long flags; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2581 | u8 asc = 0, ascq = 0; |
| 2582 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2583 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2584 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) { |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2585 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2586 | return 0; |
| 2587 | } |
| 2588 | cmd->se_cmd_flags |= SCF_SENT_CHECK_CONDITION; |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2589 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2590 | |
| 2591 | if (!reason && from_transport) |
| 2592 | goto after_reason; |
| 2593 | |
| 2594 | if (!from_transport) |
| 2595 | cmd->se_cmd_flags |= SCF_EMULATED_TASK_SENSE; |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2596 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2597 | /* |
| 2598 | * Actual SENSE DATA, see SPC-3 7.23.2 SPC_SENSE_KEY_OFFSET uses |
| 2599 | * SENSE KEY values from include/scsi/scsi.h |
| 2600 | */ |
| 2601 | switch (reason) { |
| 2602 | case TCM_NON_EXISTENT_LUN: |
Nicholas Bellinger | eb39d34 | 2011-07-26 16:59:00 -0700 | [diff] [blame] | 2603 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2604 | buffer[0] = 0x70; |
| 2605 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | eb39d34 | 2011-07-26 16:59:00 -0700 | [diff] [blame] | 2606 | /* ILLEGAL REQUEST */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2607 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
Nicholas Bellinger | eb39d34 | 2011-07-26 16:59:00 -0700 | [diff] [blame] | 2608 | /* LOGICAL UNIT NOT SUPPORTED */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2609 | buffer[SPC_ASC_KEY_OFFSET] = 0x25; |
Nicholas Bellinger | eb39d34 | 2011-07-26 16:59:00 -0700 | [diff] [blame] | 2610 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2611 | case TCM_UNSUPPORTED_SCSI_OPCODE: |
| 2612 | case TCM_SECTOR_COUNT_TOO_MANY: |
| 2613 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2614 | buffer[0] = 0x70; |
| 2615 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2616 | /* ILLEGAL REQUEST */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2617 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2618 | /* INVALID COMMAND OPERATION CODE */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2619 | buffer[SPC_ASC_KEY_OFFSET] = 0x20; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2620 | break; |
| 2621 | case TCM_UNKNOWN_MODE_PAGE: |
| 2622 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2623 | buffer[0] = 0x70; |
| 2624 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2625 | /* ILLEGAL REQUEST */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2626 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2627 | /* INVALID FIELD IN CDB */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2628 | buffer[SPC_ASC_KEY_OFFSET] = 0x24; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2629 | break; |
| 2630 | case TCM_CHECK_CONDITION_ABORT_CMD: |
| 2631 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2632 | buffer[0] = 0x70; |
| 2633 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2634 | /* ABORTED COMMAND */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2635 | buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2636 | /* BUS DEVICE RESET FUNCTION OCCURRED */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2637 | buffer[SPC_ASC_KEY_OFFSET] = 0x29; |
| 2638 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x03; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2639 | break; |
| 2640 | case TCM_INCORRECT_AMOUNT_OF_DATA: |
| 2641 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2642 | buffer[0] = 0x70; |
| 2643 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2644 | /* ABORTED COMMAND */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2645 | buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2646 | /* WRITE ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2647 | buffer[SPC_ASC_KEY_OFFSET] = 0x0c; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2648 | /* NOT ENOUGH UNSOLICITED DATA */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2649 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x0d; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2650 | break; |
| 2651 | case TCM_INVALID_CDB_FIELD: |
| 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 | 9fbc890 | 2012-01-09 17:54:00 -0800 | [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; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2657 | /* INVALID FIELD IN CDB */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2658 | buffer[SPC_ASC_KEY_OFFSET] = 0x24; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2659 | break; |
| 2660 | case TCM_INVALID_PARAMETER_LIST: |
| 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; |
Roland Dreier | 9fbc890 | 2012-01-09 17:54:00 -0800 | [diff] [blame] | 2664 | /* ILLEGAL REQUEST */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2665 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2666 | /* INVALID FIELD IN PARAMETER LIST */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2667 | buffer[SPC_ASC_KEY_OFFSET] = 0x26; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2668 | break; |
| 2669 | case TCM_UNEXPECTED_UNSOLICITED_DATA: |
| 2670 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2671 | buffer[0] = 0x70; |
| 2672 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2673 | /* ABORTED COMMAND */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2674 | buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2675 | /* WRITE ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2676 | buffer[SPC_ASC_KEY_OFFSET] = 0x0c; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2677 | /* UNEXPECTED_UNSOLICITED_DATA */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2678 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x0c; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2679 | break; |
| 2680 | case TCM_SERVICE_CRC_ERROR: |
| 2681 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2682 | buffer[0] = 0x70; |
| 2683 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2684 | /* ABORTED COMMAND */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2685 | buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2686 | /* PROTOCOL SERVICE CRC ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2687 | buffer[SPC_ASC_KEY_OFFSET] = 0x47; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2688 | /* N/A */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2689 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x05; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2690 | break; |
| 2691 | case TCM_SNACK_REJECTED: |
| 2692 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2693 | buffer[0] = 0x70; |
| 2694 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2695 | /* ABORTED COMMAND */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2696 | buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2697 | /* READ ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2698 | buffer[SPC_ASC_KEY_OFFSET] = 0x11; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2699 | /* FAILED RETRANSMISSION REQUEST */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2700 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x13; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2701 | break; |
| 2702 | case TCM_WRITE_PROTECTED: |
| 2703 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2704 | buffer[0] = 0x70; |
| 2705 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2706 | /* DATA PROTECT */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2707 | buffer[SPC_SENSE_KEY_OFFSET] = DATA_PROTECT; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2708 | /* WRITE PROTECTED */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2709 | buffer[SPC_ASC_KEY_OFFSET] = 0x27; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2710 | break; |
Roland Dreier | e2397c7 | 2012-07-16 15:34:21 -0700 | [diff] [blame] | 2711 | case TCM_ADDRESS_OUT_OF_RANGE: |
| 2712 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2713 | buffer[0] = 0x70; |
| 2714 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Roland Dreier | e2397c7 | 2012-07-16 15:34:21 -0700 | [diff] [blame] | 2715 | /* ILLEGAL REQUEST */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2716 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
Roland Dreier | e2397c7 | 2012-07-16 15:34:21 -0700 | [diff] [blame] | 2717 | /* LOGICAL BLOCK ADDRESS OUT OF RANGE */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2718 | buffer[SPC_ASC_KEY_OFFSET] = 0x21; |
Roland Dreier | e2397c7 | 2012-07-16 15:34:21 -0700 | [diff] [blame] | 2719 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2720 | case TCM_CHECK_CONDITION_UNIT_ATTENTION: |
| 2721 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2722 | buffer[0] = 0x70; |
| 2723 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2724 | /* UNIT ATTENTION */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2725 | buffer[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2726 | core_scsi3_ua_for_check_condition(cmd, &asc, &ascq); |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2727 | buffer[SPC_ASC_KEY_OFFSET] = asc; |
| 2728 | buffer[SPC_ASCQ_KEY_OFFSET] = ascq; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2729 | break; |
| 2730 | case TCM_CHECK_CONDITION_NOT_READY: |
| 2731 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2732 | buffer[0] = 0x70; |
| 2733 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2734 | /* Not Ready */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2735 | buffer[SPC_SENSE_KEY_OFFSET] = NOT_READY; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2736 | transport_get_sense_codes(cmd, &asc, &ascq); |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2737 | buffer[SPC_ASC_KEY_OFFSET] = asc; |
| 2738 | buffer[SPC_ASCQ_KEY_OFFSET] = ascq; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2739 | break; |
| 2740 | case TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE: |
| 2741 | default: |
| 2742 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2743 | buffer[0] = 0x70; |
| 2744 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2745 | /* ILLEGAL REQUEST */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2746 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2747 | /* LOGICAL UNIT COMMUNICATION FAILURE */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2748 | buffer[SPC_ASC_KEY_OFFSET] = 0x80; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2749 | break; |
| 2750 | } |
| 2751 | /* |
| 2752 | * This code uses linux/include/scsi/scsi.h SAM status codes! |
| 2753 | */ |
| 2754 | cmd->scsi_status = SAM_STAT_CHECK_CONDITION; |
| 2755 | /* |
| 2756 | * Automatically padded, this value is encoded in the fabric's |
| 2757 | * data_length response PDU containing the SCSI defined sense data. |
| 2758 | */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2759 | cmd->scsi_sense_length = TRANSPORT_SENSE_BUFFER; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2760 | |
| 2761 | after_reason: |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 2762 | return cmd->se_tfo->queue_status(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2763 | } |
| 2764 | EXPORT_SYMBOL(transport_send_check_condition_and_sense); |
| 2765 | |
| 2766 | int transport_check_aborted_status(struct se_cmd *cmd, int send_status) |
| 2767 | { |
| 2768 | int ret = 0; |
| 2769 | |
Christoph Hellwig | 7d680f3 | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 2770 | if (cmd->transport_state & CMD_T_ABORTED) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2771 | if (!send_status || |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2772 | (cmd->se_cmd_flags & SCF_SENT_DELAYED_TAS)) |
| 2773 | return 1; |
Andy Grover | 8b1e124 | 2012-04-03 15:51:12 -0700 | [diff] [blame] | 2774 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2775 | pr_debug("Sending delayed SAM_STAT_TASK_ABORTED" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2776 | " status for CDB: 0x%02x ITT: 0x%08x\n", |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2777 | cmd->t_task_cdb[0], |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2778 | cmd->se_tfo->get_task_tag(cmd)); |
Andy Grover | 8b1e124 | 2012-04-03 15:51:12 -0700 | [diff] [blame] | 2779 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2780 | cmd->se_cmd_flags |= SCF_SENT_DELAYED_TAS; |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2781 | cmd->se_tfo->queue_status(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2782 | ret = 1; |
| 2783 | } |
| 2784 | return ret; |
| 2785 | } |
| 2786 | EXPORT_SYMBOL(transport_check_aborted_status); |
| 2787 | |
| 2788 | void transport_send_task_abort(struct se_cmd *cmd) |
| 2789 | { |
Nicholas Bellinger | c252f00 | 2011-09-29 14:22:13 -0700 | [diff] [blame] | 2790 | unsigned long flags; |
| 2791 | |
| 2792 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
| 2793 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) { |
| 2794 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
| 2795 | return; |
| 2796 | } |
| 2797 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
| 2798 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2799 | /* |
| 2800 | * If there are still expected incoming fabric WRITEs, we wait |
| 2801 | * until until they have completed before sending a TASK_ABORTED |
| 2802 | * response. This response with TASK_ABORTED status will be |
| 2803 | * queued back to fabric module by transport_check_aborted_status(). |
| 2804 | */ |
| 2805 | if (cmd->data_direction == DMA_TO_DEVICE) { |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2806 | if (cmd->se_tfo->write_pending_status(cmd) != 0) { |
Christoph Hellwig | 7d680f3 | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 2807 | cmd->transport_state |= CMD_T_ABORTED; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2808 | smp_mb__after_atomic_inc(); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2809 | } |
| 2810 | } |
| 2811 | cmd->scsi_status = SAM_STAT_TASK_ABORTED; |
Andy Grover | 8b1e124 | 2012-04-03 15:51:12 -0700 | [diff] [blame] | 2812 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2813 | pr_debug("Setting SAM_STAT_TASK_ABORTED status for CDB: 0x%02x," |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2814 | " ITT: 0x%08x\n", cmd->t_task_cdb[0], |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2815 | cmd->se_tfo->get_task_tag(cmd)); |
Andy Grover | 8b1e124 | 2012-04-03 15:51:12 -0700 | [diff] [blame] | 2816 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2817 | cmd->se_tfo->queue_status(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2818 | } |
| 2819 | |
Christoph Hellwig | af87729 | 2012-07-08 15:58:49 -0400 | [diff] [blame] | 2820 | static void target_tmr_work(struct work_struct *work) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2821 | { |
Christoph Hellwig | af87729 | 2012-07-08 15:58:49 -0400 | [diff] [blame] | 2822 | struct se_cmd *cmd = container_of(work, struct se_cmd, work); |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 2823 | struct se_device *dev = cmd->se_dev; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2824 | struct se_tmr_req *tmr = cmd->se_tmr_req; |
| 2825 | int ret; |
| 2826 | |
| 2827 | switch (tmr->function) { |
Nicholas Bellinger | 5c6cd61 | 2011-03-14 04:06:04 -0700 | [diff] [blame] | 2828 | case TMR_ABORT_TASK: |
Nicholas Bellinger | 3d28934 | 2012-02-13 02:38:14 -0800 | [diff] [blame] | 2829 | core_tmr_abort_task(dev, tmr, cmd->se_sess); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2830 | break; |
Nicholas Bellinger | 5c6cd61 | 2011-03-14 04:06:04 -0700 | [diff] [blame] | 2831 | case TMR_ABORT_TASK_SET: |
| 2832 | case TMR_CLEAR_ACA: |
| 2833 | case TMR_CLEAR_TASK_SET: |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2834 | tmr->response = TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED; |
| 2835 | break; |
Nicholas Bellinger | 5c6cd61 | 2011-03-14 04:06:04 -0700 | [diff] [blame] | 2836 | case TMR_LUN_RESET: |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2837 | ret = core_tmr_lun_reset(dev, tmr, NULL, NULL); |
| 2838 | tmr->response = (!ret) ? TMR_FUNCTION_COMPLETE : |
| 2839 | TMR_FUNCTION_REJECTED; |
| 2840 | break; |
Nicholas Bellinger | 5c6cd61 | 2011-03-14 04:06:04 -0700 | [diff] [blame] | 2841 | case TMR_TARGET_WARM_RESET: |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2842 | tmr->response = TMR_FUNCTION_REJECTED; |
| 2843 | break; |
Nicholas Bellinger | 5c6cd61 | 2011-03-14 04:06:04 -0700 | [diff] [blame] | 2844 | case TMR_TARGET_COLD_RESET: |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2845 | tmr->response = TMR_FUNCTION_REJECTED; |
| 2846 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2847 | default: |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2848 | pr_err("Uknown TMR function: 0x%02x.\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2849 | tmr->function); |
| 2850 | tmr->response = TMR_FUNCTION_REJECTED; |
| 2851 | break; |
| 2852 | } |
| 2853 | |
| 2854 | cmd->t_state = TRANSPORT_ISTATE_PROCESSING; |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2855 | cmd->se_tfo->queue_tm_rsp(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2856 | |
Christoph Hellwig | b7b8bef | 2011-10-17 13:56:44 -0400 | [diff] [blame] | 2857 | transport_cmd_check_stop_to_fabric(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2858 | } |
| 2859 | |
Christoph Hellwig | af87729 | 2012-07-08 15:58:49 -0400 | [diff] [blame] | 2860 | int transport_generic_handle_tmr( |
| 2861 | struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2862 | { |
Christoph Hellwig | af87729 | 2012-07-08 15:58:49 -0400 | [diff] [blame] | 2863 | INIT_WORK(&cmd->work, target_tmr_work); |
| 2864 | queue_work(cmd->se_dev->tmr_wq, &cmd->work); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2865 | return 0; |
| 2866 | } |
Christoph Hellwig | af87729 | 2012-07-08 15:58:49 -0400 | [diff] [blame] | 2867 | EXPORT_SYMBOL(transport_generic_handle_tmr); |