Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1 | /******************************************************************************* |
| 2 | * Filename: target_core_iblock.c |
| 3 | * |
| 4 | * This file contains the Storage Engine <-> Linux BlockIO transport |
| 5 | * specific functions. |
| 6 | * |
| 7 | * Copyright (c) 2003, 2004, 2005 PyX Technologies, Inc. |
| 8 | * Copyright (c) 2005, 2006, 2007 SBE, Inc. |
| 9 | * Copyright (c) 2007-2010 Rising Tide Systems |
| 10 | * Copyright (c) 2008-2010 Linux-iSCSI.org |
| 11 | * |
| 12 | * Nicholas A. Bellinger <nab@kernel.org> |
| 13 | * |
| 14 | * This program is free software; you can redistribute it and/or modify |
| 15 | * it under the terms of the GNU General Public License as published by |
| 16 | * the Free Software Foundation; either version 2 of the License, or |
| 17 | * (at your option) any later version. |
| 18 | * |
| 19 | * This program is distributed in the hope that it will be useful, |
| 20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 22 | * GNU General Public License for more details. |
| 23 | * |
| 24 | * You should have received a copy of the GNU General Public License |
| 25 | * along with this program; if not, write to the Free Software |
| 26 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 27 | * |
| 28 | ******************************************************************************/ |
| 29 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 30 | #include <linux/string.h> |
| 31 | #include <linux/parser.h> |
| 32 | #include <linux/timer.h> |
| 33 | #include <linux/fs.h> |
| 34 | #include <linux/blkdev.h> |
| 35 | #include <linux/slab.h> |
| 36 | #include <linux/spinlock.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 37 | #include <linux/bio.h> |
| 38 | #include <linux/genhd.h> |
| 39 | #include <linux/file.h> |
Paul Gortmaker | 827509e | 2011-08-30 14:20:44 -0400 | [diff] [blame] | 40 | #include <linux/module.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 41 | #include <scsi/scsi.h> |
| 42 | #include <scsi/scsi_host.h> |
| 43 | |
| 44 | #include <target/target_core_base.h> |
Christoph Hellwig | c4795fb | 2011-11-16 09:46:48 -0500 | [diff] [blame] | 45 | #include <target/target_core_backend.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 46 | |
| 47 | #include "target_core_iblock.h" |
| 48 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 49 | static struct se_subsystem_api iblock_template; |
| 50 | |
| 51 | static void iblock_bio_done(struct bio *, int); |
| 52 | |
| 53 | /* iblock_attach_hba(): (Part of se_subsystem_api_t template) |
| 54 | * |
| 55 | * |
| 56 | */ |
| 57 | static int iblock_attach_hba(struct se_hba *hba, u32 host_id) |
| 58 | { |
| 59 | struct iblock_hba *ib_host; |
| 60 | |
| 61 | ib_host = kzalloc(sizeof(struct iblock_hba), GFP_KERNEL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 62 | if (!ib_host) { |
| 63 | pr_err("Unable to allocate memory for" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 64 | " struct iblock_hba\n"); |
| 65 | return -ENOMEM; |
| 66 | } |
| 67 | |
| 68 | ib_host->iblock_host_id = host_id; |
| 69 | |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 70 | hba->hba_ptr = ib_host; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 71 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 72 | pr_debug("CORE_HBA[%d] - TCM iBlock HBA Driver %s on" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 73 | " Generic Target Core Stack %s\n", hba->hba_id, |
| 74 | IBLOCK_VERSION, TARGET_CORE_MOD_VERSION); |
| 75 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 76 | pr_debug("CORE_HBA[%d] - Attached iBlock HBA: %u to Generic\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 77 | hba->hba_id, ib_host->iblock_host_id); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 78 | |
| 79 | return 0; |
| 80 | } |
| 81 | |
| 82 | static void iblock_detach_hba(struct se_hba *hba) |
| 83 | { |
| 84 | struct iblock_hba *ib_host = hba->hba_ptr; |
| 85 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 86 | pr_debug("CORE_HBA[%d] - Detached iBlock HBA: %u from Generic" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 87 | " Target Core\n", hba->hba_id, ib_host->iblock_host_id); |
| 88 | |
| 89 | kfree(ib_host); |
| 90 | hba->hba_ptr = NULL; |
| 91 | } |
| 92 | |
| 93 | static void *iblock_allocate_virtdevice(struct se_hba *hba, const char *name) |
| 94 | { |
| 95 | struct iblock_dev *ib_dev = NULL; |
| 96 | struct iblock_hba *ib_host = hba->hba_ptr; |
| 97 | |
| 98 | ib_dev = kzalloc(sizeof(struct iblock_dev), GFP_KERNEL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 99 | if (!ib_dev) { |
| 100 | pr_err("Unable to allocate struct iblock_dev\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 101 | return NULL; |
| 102 | } |
| 103 | ib_dev->ibd_host = ib_host; |
| 104 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 105 | pr_debug( "IBLOCK: Allocated ib_dev for %s\n", name); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 106 | |
| 107 | return ib_dev; |
| 108 | } |
| 109 | |
| 110 | static struct se_device *iblock_create_virtdevice( |
| 111 | struct se_hba *hba, |
| 112 | struct se_subsystem_dev *se_dev, |
| 113 | void *p) |
| 114 | { |
| 115 | struct iblock_dev *ib_dev = p; |
| 116 | struct se_device *dev; |
| 117 | struct se_dev_limits dev_limits; |
| 118 | struct block_device *bd = NULL; |
| 119 | struct request_queue *q; |
| 120 | struct queue_limits *limits; |
| 121 | u32 dev_flags = 0; |
Nicholas Bellinger | 613640e | 2011-03-14 04:05:59 -0700 | [diff] [blame] | 122 | int ret = -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 123 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 124 | if (!ib_dev) { |
| 125 | pr_err("Unable to locate struct iblock_dev parameter\n"); |
Nicholas Bellinger | 613640e | 2011-03-14 04:05:59 -0700 | [diff] [blame] | 126 | return ERR_PTR(ret); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 127 | } |
| 128 | memset(&dev_limits, 0, sizeof(struct se_dev_limits)); |
| 129 | /* |
| 130 | * These settings need to be made tunable.. |
| 131 | */ |
| 132 | ib_dev->ibd_bio_set = bioset_create(32, 64); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 133 | if (!ib_dev->ibd_bio_set) { |
| 134 | pr_err("IBLOCK: Unable to create bioset()\n"); |
Nicholas Bellinger | 613640e | 2011-03-14 04:05:59 -0700 | [diff] [blame] | 135 | return ERR_PTR(-ENOMEM); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 136 | } |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 137 | pr_debug("IBLOCK: Created bio_set()\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 138 | /* |
| 139 | * iblock_check_configfs_dev_params() ensures that ib_dev->ibd_udev_path |
| 140 | * must already have been set in order for echo 1 > $HBA/$DEV/enable to run. |
| 141 | */ |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 142 | pr_debug( "IBLOCK: Claiming struct block_device: %s\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 143 | ib_dev->ibd_udev_path); |
| 144 | |
| 145 | bd = blkdev_get_by_path(ib_dev->ibd_udev_path, |
| 146 | FMODE_WRITE|FMODE_READ|FMODE_EXCL, ib_dev); |
Nicholas Bellinger | 613640e | 2011-03-14 04:05:59 -0700 | [diff] [blame] | 147 | if (IS_ERR(bd)) { |
| 148 | ret = PTR_ERR(bd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 149 | goto failed; |
Nicholas Bellinger | 613640e | 2011-03-14 04:05:59 -0700 | [diff] [blame] | 150 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 151 | /* |
| 152 | * Setup the local scope queue_limits from struct request_queue->limits |
| 153 | * to pass into transport_add_device_to_core_hba() as struct se_dev_limits. |
| 154 | */ |
| 155 | q = bdev_get_queue(bd); |
| 156 | limits = &dev_limits.limits; |
| 157 | limits->logical_block_size = bdev_logical_block_size(bd); |
| 158 | limits->max_hw_sectors = queue_max_hw_sectors(q); |
| 159 | limits->max_sectors = queue_max_sectors(q); |
Nicholas Bellinger | 8f3d14e | 2011-06-22 01:32:20 -0700 | [diff] [blame] | 160 | dev_limits.hw_queue_depth = q->nr_requests; |
| 161 | dev_limits.queue_depth = q->nr_requests; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 162 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 163 | ib_dev->ibd_bd = bd; |
| 164 | |
| 165 | dev = transport_add_device_to_core_hba(hba, |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 166 | &iblock_template, se_dev, dev_flags, ib_dev, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 167 | &dev_limits, "IBLOCK", IBLOCK_VERSION); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 168 | if (!dev) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 169 | goto failed; |
| 170 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 171 | /* |
| 172 | * Check if the underlying struct block_device request_queue supports |
| 173 | * the QUEUE_FLAG_DISCARD bit for UNMAP/WRITE_SAME in SCSI + TRIM |
| 174 | * in ATA and we need to set TPE=1 |
| 175 | */ |
Nicholas Bellinger | 613640e | 2011-03-14 04:05:59 -0700 | [diff] [blame] | 176 | if (blk_queue_discard(q)) { |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 177 | dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count = |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 178 | q->limits.max_discard_sectors; |
| 179 | /* |
| 180 | * Currently hardcoded to 1 in Linux/SCSI code.. |
| 181 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 182 | dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count = 1; |
| 183 | dev->se_sub_dev->se_dev_attrib.unmap_granularity = |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 184 | q->limits.discard_granularity; |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 185 | dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment = |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 186 | q->limits.discard_alignment; |
| 187 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 188 | pr_debug("IBLOCK: BLOCK Discard support available," |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 189 | " disabled by default\n"); |
| 190 | } |
| 191 | |
Roland Dreier | e22a7f0 | 2011-07-05 13:34:52 -0700 | [diff] [blame] | 192 | if (blk_queue_nonrot(q)) |
| 193 | dev->se_sub_dev->se_dev_attrib.is_nonrot = 1; |
| 194 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 195 | return dev; |
| 196 | |
| 197 | failed: |
| 198 | if (ib_dev->ibd_bio_set) { |
| 199 | bioset_free(ib_dev->ibd_bio_set); |
| 200 | ib_dev->ibd_bio_set = NULL; |
| 201 | } |
| 202 | ib_dev->ibd_bd = NULL; |
Nicholas Bellinger | 613640e | 2011-03-14 04:05:59 -0700 | [diff] [blame] | 203 | return ERR_PTR(ret); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 204 | } |
| 205 | |
| 206 | static void iblock_free_device(void *p) |
| 207 | { |
| 208 | struct iblock_dev *ib_dev = p; |
| 209 | |
Nicholas Bellinger | bc66552 | 2011-02-09 15:34:38 -0800 | [diff] [blame] | 210 | if (ib_dev->ibd_bd != NULL) |
| 211 | blkdev_put(ib_dev->ibd_bd, FMODE_WRITE|FMODE_READ|FMODE_EXCL); |
| 212 | if (ib_dev->ibd_bio_set != NULL) |
| 213 | bioset_free(ib_dev->ibd_bio_set); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 214 | kfree(ib_dev); |
| 215 | } |
| 216 | |
| 217 | static inline struct iblock_req *IBLOCK_REQ(struct se_task *task) |
| 218 | { |
| 219 | return container_of(task, struct iblock_req, ib_task); |
| 220 | } |
| 221 | |
| 222 | static struct se_task * |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 223 | iblock_alloc_task(unsigned char *cdb) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 224 | { |
| 225 | struct iblock_req *ib_req; |
| 226 | |
| 227 | ib_req = kzalloc(sizeof(struct iblock_req), GFP_KERNEL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 228 | if (!ib_req) { |
| 229 | pr_err("Unable to allocate memory for struct iblock_req\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 230 | return NULL; |
| 231 | } |
| 232 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 233 | atomic_set(&ib_req->ib_bio_cnt, 0); |
| 234 | return &ib_req->ib_task; |
| 235 | } |
| 236 | |
| 237 | static unsigned long long iblock_emulate_read_cap_with_block_size( |
| 238 | struct se_device *dev, |
| 239 | struct block_device *bd, |
| 240 | struct request_queue *q) |
| 241 | { |
| 242 | unsigned long long blocks_long = (div_u64(i_size_read(bd->bd_inode), |
| 243 | bdev_logical_block_size(bd)) - 1); |
| 244 | u32 block_size = bdev_logical_block_size(bd); |
| 245 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 246 | if (block_size == dev->se_sub_dev->se_dev_attrib.block_size) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 247 | return blocks_long; |
| 248 | |
| 249 | switch (block_size) { |
| 250 | case 4096: |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 251 | switch (dev->se_sub_dev->se_dev_attrib.block_size) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 252 | case 2048: |
| 253 | blocks_long <<= 1; |
| 254 | break; |
| 255 | case 1024: |
| 256 | blocks_long <<= 2; |
| 257 | break; |
| 258 | case 512: |
| 259 | blocks_long <<= 3; |
| 260 | default: |
| 261 | break; |
| 262 | } |
| 263 | break; |
| 264 | case 2048: |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 265 | switch (dev->se_sub_dev->se_dev_attrib.block_size) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 266 | case 4096: |
| 267 | blocks_long >>= 1; |
| 268 | break; |
| 269 | case 1024: |
| 270 | blocks_long <<= 1; |
| 271 | break; |
| 272 | case 512: |
| 273 | blocks_long <<= 2; |
| 274 | break; |
| 275 | default: |
| 276 | break; |
| 277 | } |
| 278 | break; |
| 279 | case 1024: |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 280 | switch (dev->se_sub_dev->se_dev_attrib.block_size) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 281 | case 4096: |
| 282 | blocks_long >>= 2; |
| 283 | break; |
| 284 | case 2048: |
| 285 | blocks_long >>= 1; |
| 286 | break; |
| 287 | case 512: |
| 288 | blocks_long <<= 1; |
| 289 | break; |
| 290 | default: |
| 291 | break; |
| 292 | } |
| 293 | break; |
| 294 | case 512: |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 295 | switch (dev->se_sub_dev->se_dev_attrib.block_size) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 296 | case 4096: |
| 297 | blocks_long >>= 3; |
| 298 | break; |
| 299 | case 2048: |
| 300 | blocks_long >>= 2; |
| 301 | break; |
| 302 | case 1024: |
| 303 | blocks_long >>= 1; |
| 304 | break; |
| 305 | default: |
| 306 | break; |
| 307 | } |
| 308 | break; |
| 309 | default: |
| 310 | break; |
| 311 | } |
| 312 | |
| 313 | return blocks_long; |
| 314 | } |
| 315 | |
Christoph Hellwig | df5fa69 | 2011-10-14 07:29:58 -0400 | [diff] [blame] | 316 | static void iblock_end_io_flush(struct bio *bio, int err) |
| 317 | { |
| 318 | struct se_cmd *cmd = bio->bi_private; |
| 319 | |
| 320 | if (err) |
| 321 | pr_err("IBLOCK: cache flush failed: %d\n", err); |
| 322 | |
| 323 | if (cmd) |
| 324 | transport_complete_sync_cache(cmd, err == 0); |
| 325 | bio_put(bio); |
| 326 | } |
| 327 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 328 | /* |
Christoph Hellwig | df5fa69 | 2011-10-14 07:29:58 -0400 | [diff] [blame] | 329 | * Implement SYCHRONIZE CACHE. Note that we can't handle lba ranges and must |
| 330 | * always flush the whole cache. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 331 | */ |
| 332 | static void iblock_emulate_sync_cache(struct se_task *task) |
| 333 | { |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 334 | struct se_cmd *cmd = task->task_se_cmd; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 335 | struct iblock_dev *ib_dev = cmd->se_dev->dev_ptr; |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 336 | int immed = (cmd->t_task_cdb[1] & 0x2); |
Christoph Hellwig | df5fa69 | 2011-10-14 07:29:58 -0400 | [diff] [blame] | 337 | struct bio *bio; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 338 | |
| 339 | /* |
| 340 | * If the Immediate bit is set, queue up the GOOD response |
Christoph Hellwig | df5fa69 | 2011-10-14 07:29:58 -0400 | [diff] [blame] | 341 | * for this SYNCHRONIZE_CACHE op. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 342 | */ |
| 343 | if (immed) |
| 344 | transport_complete_sync_cache(cmd, 1); |
| 345 | |
Christoph Hellwig | df5fa69 | 2011-10-14 07:29:58 -0400 | [diff] [blame] | 346 | bio = bio_alloc(GFP_KERNEL, 0); |
| 347 | bio->bi_end_io = iblock_end_io_flush; |
| 348 | bio->bi_bdev = ib_dev->ibd_bd; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 349 | if (!immed) |
Christoph Hellwig | df5fa69 | 2011-10-14 07:29:58 -0400 | [diff] [blame] | 350 | bio->bi_private = cmd; |
| 351 | submit_bio(WRITE_FLUSH, bio); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 352 | } |
| 353 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 354 | static int iblock_do_discard(struct se_device *dev, sector_t lba, u32 range) |
| 355 | { |
| 356 | struct iblock_dev *ibd = dev->dev_ptr; |
| 357 | struct block_device *bd = ibd->ibd_bd; |
| 358 | int barrier = 0; |
| 359 | |
| 360 | return blkdev_issue_discard(bd, lba, range, GFP_KERNEL, barrier); |
| 361 | } |
| 362 | |
| 363 | static void iblock_free_task(struct se_task *task) |
| 364 | { |
Christoph Hellwig | dbbf3e9 | 2011-09-25 14:56:24 -0400 | [diff] [blame] | 365 | kfree(IBLOCK_REQ(task)); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 366 | } |
| 367 | |
| 368 | enum { |
| 369 | Opt_udev_path, Opt_force, Opt_err |
| 370 | }; |
| 371 | |
| 372 | static match_table_t tokens = { |
| 373 | {Opt_udev_path, "udev_path=%s"}, |
| 374 | {Opt_force, "force=%d"}, |
| 375 | {Opt_err, NULL} |
| 376 | }; |
| 377 | |
| 378 | static ssize_t iblock_set_configfs_dev_params(struct se_hba *hba, |
| 379 | struct se_subsystem_dev *se_dev, |
| 380 | const char *page, ssize_t count) |
| 381 | { |
| 382 | struct iblock_dev *ib_dev = se_dev->se_dev_su_ptr; |
Jesper Juhl | 6d18025 | 2011-03-14 04:05:56 -0700 | [diff] [blame] | 383 | char *orig, *ptr, *arg_p, *opts; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 384 | substring_t args[MAX_OPT_ARGS]; |
Roland Dreier | 21bca31 | 2011-07-05 15:35:02 -0700 | [diff] [blame] | 385 | int ret = 0, token; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 386 | |
| 387 | opts = kstrdup(page, GFP_KERNEL); |
| 388 | if (!opts) |
| 389 | return -ENOMEM; |
| 390 | |
| 391 | orig = opts; |
| 392 | |
Sebastian Andrzej Siewior | 90c161b | 2011-11-23 20:53:17 +0100 | [diff] [blame] | 393 | while ((ptr = strsep(&opts, ",\n")) != NULL) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 394 | if (!*ptr) |
| 395 | continue; |
| 396 | |
| 397 | token = match_token(ptr, tokens, args); |
| 398 | switch (token) { |
| 399 | case Opt_udev_path: |
| 400 | if (ib_dev->ibd_bd) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 401 | pr_err("Unable to set udev_path= while" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 402 | " ib_dev->ibd_bd exists\n"); |
| 403 | ret = -EEXIST; |
| 404 | goto out; |
| 405 | } |
Jesper Juhl | 6d18025 | 2011-03-14 04:05:56 -0700 | [diff] [blame] | 406 | arg_p = match_strdup(&args[0]); |
| 407 | if (!arg_p) { |
| 408 | ret = -ENOMEM; |
| 409 | break; |
| 410 | } |
| 411 | snprintf(ib_dev->ibd_udev_path, SE_UDEV_PATH_LEN, |
| 412 | "%s", arg_p); |
| 413 | kfree(arg_p); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 414 | pr_debug("IBLOCK: Referencing UDEV path: %s\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 415 | ib_dev->ibd_udev_path); |
| 416 | ib_dev->ibd_flags |= IBDF_HAS_UDEV_PATH; |
| 417 | break; |
| 418 | case Opt_force: |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 419 | break; |
| 420 | default: |
| 421 | break; |
| 422 | } |
| 423 | } |
| 424 | |
| 425 | out: |
| 426 | kfree(orig); |
| 427 | return (!ret) ? count : ret; |
| 428 | } |
| 429 | |
| 430 | static ssize_t iblock_check_configfs_dev_params( |
| 431 | struct se_hba *hba, |
| 432 | struct se_subsystem_dev *se_dev) |
| 433 | { |
| 434 | struct iblock_dev *ibd = se_dev->se_dev_su_ptr; |
| 435 | |
| 436 | if (!(ibd->ibd_flags & IBDF_HAS_UDEV_PATH)) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 437 | pr_err("Missing udev_path= parameters for IBLOCK\n"); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 438 | return -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 439 | } |
| 440 | |
| 441 | return 0; |
| 442 | } |
| 443 | |
| 444 | static ssize_t iblock_show_configfs_dev_params( |
| 445 | struct se_hba *hba, |
| 446 | struct se_subsystem_dev *se_dev, |
| 447 | char *b) |
| 448 | { |
| 449 | struct iblock_dev *ibd = se_dev->se_dev_su_ptr; |
| 450 | struct block_device *bd = ibd->ibd_bd; |
| 451 | char buf[BDEVNAME_SIZE]; |
| 452 | ssize_t bl = 0; |
| 453 | |
| 454 | if (bd) |
| 455 | bl += sprintf(b + bl, "iBlock device: %s", |
| 456 | bdevname(bd, buf)); |
| 457 | if (ibd->ibd_flags & IBDF_HAS_UDEV_PATH) { |
| 458 | bl += sprintf(b + bl, " UDEV PATH: %s\n", |
| 459 | ibd->ibd_udev_path); |
| 460 | } else |
| 461 | bl += sprintf(b + bl, "\n"); |
| 462 | |
| 463 | bl += sprintf(b + bl, " "); |
| 464 | if (bd) { |
| 465 | bl += sprintf(b + bl, "Major: %d Minor: %d %s\n", |
Roland Dreier | 21bca31 | 2011-07-05 15:35:02 -0700 | [diff] [blame] | 466 | MAJOR(bd->bd_dev), MINOR(bd->bd_dev), (!bd->bd_contains) ? |
Jörn Engel | 8359cf4 | 2011-11-24 02:05:51 +0100 | [diff] [blame] | 467 | "" : (bd->bd_holder == ibd) ? |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 468 | "CLAIMED: IBLOCK" : "CLAIMED: OS"); |
| 469 | } else { |
Roland Dreier | 21bca31 | 2011-07-05 15:35:02 -0700 | [diff] [blame] | 470 | bl += sprintf(b + bl, "Major: 0 Minor: 0\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 471 | } |
| 472 | |
| 473 | return bl; |
| 474 | } |
| 475 | |
| 476 | static void iblock_bio_destructor(struct bio *bio) |
| 477 | { |
| 478 | struct se_task *task = bio->bi_private; |
Christoph Hellwig | 42bf829 | 2011-10-12 11:07:00 -0400 | [diff] [blame] | 479 | struct iblock_dev *ib_dev = task->task_se_cmd->se_dev->dev_ptr; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 480 | |
| 481 | bio_free(bio, ib_dev->ibd_bio_set); |
| 482 | } |
| 483 | |
Christoph Hellwig | dbbf3e9 | 2011-09-25 14:56:24 -0400 | [diff] [blame] | 484 | static struct bio * |
| 485 | iblock_get_bio(struct se_task *task, sector_t lba, u32 sg_num) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 486 | { |
Christoph Hellwig | 42bf829 | 2011-10-12 11:07:00 -0400 | [diff] [blame] | 487 | struct iblock_dev *ib_dev = task->task_se_cmd->se_dev->dev_ptr; |
Christoph Hellwig | dbbf3e9 | 2011-09-25 14:56:24 -0400 | [diff] [blame] | 488 | struct iblock_req *ib_req = IBLOCK_REQ(task); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 489 | struct bio *bio; |
| 490 | |
| 491 | bio = bio_alloc_bioset(GFP_NOIO, sg_num, ib_dev->ibd_bio_set); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 492 | if (!bio) { |
| 493 | pr_err("Unable to allocate memory for bio\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 494 | return NULL; |
| 495 | } |
| 496 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 497 | pr_debug("Allocated bio: %p task_sg_nents: %u using ibd_bio_set:" |
| 498 | " %p\n", bio, task->task_sg_nents, ib_dev->ibd_bio_set); |
| 499 | pr_debug("Allocated bio: %p task_size: %u\n", bio, task->task_size); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 500 | |
| 501 | bio->bi_bdev = ib_dev->ibd_bd; |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 502 | bio->bi_private = task; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 503 | bio->bi_destructor = iblock_bio_destructor; |
| 504 | bio->bi_end_io = &iblock_bio_done; |
| 505 | bio->bi_sector = lba; |
| 506 | atomic_inc(&ib_req->ib_bio_cnt); |
| 507 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 508 | pr_debug("Set bio->bi_sector: %llu\n", (unsigned long long)bio->bi_sector); |
| 509 | pr_debug("Set ib_req->ib_bio_cnt: %d\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 510 | atomic_read(&ib_req->ib_bio_cnt)); |
| 511 | return bio; |
| 512 | } |
| 513 | |
Christoph Hellwig | dbbf3e9 | 2011-09-25 14:56:24 -0400 | [diff] [blame] | 514 | static int iblock_do_task(struct se_task *task) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 515 | { |
| 516 | struct se_cmd *cmd = task->task_se_cmd; |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 517 | struct se_device *dev = cmd->se_dev; |
Christoph Hellwig | dbbf3e9 | 2011-09-25 14:56:24 -0400 | [diff] [blame] | 518 | struct bio *bio; |
| 519 | struct bio_list list; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 520 | struct scatterlist *sg; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 521 | u32 i, sg_num = task->task_sg_nents; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 522 | sector_t block_lba; |
Christoph Hellwig | dbbf3e9 | 2011-09-25 14:56:24 -0400 | [diff] [blame] | 523 | struct blk_plug plug; |
| 524 | int rw; |
| 525 | |
| 526 | if (task->task_data_direction == DMA_TO_DEVICE) { |
| 527 | /* |
| 528 | * Force data to disk if we pretend to not have a volatile |
| 529 | * write cache, or the initiator set the Force Unit Access bit. |
| 530 | */ |
| 531 | if (dev->se_sub_dev->se_dev_attrib.emulate_write_cache == 0 || |
| 532 | (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0 && |
Christoph Hellwig | 2d3a4b5 | 2011-11-14 11:36:29 -0500 | [diff] [blame] | 533 | (cmd->se_cmd_flags & SCF_FUA))) |
Christoph Hellwig | dbbf3e9 | 2011-09-25 14:56:24 -0400 | [diff] [blame] | 534 | rw = WRITE_FUA; |
| 535 | else |
| 536 | rw = WRITE; |
| 537 | } else { |
| 538 | rw = READ; |
| 539 | } |
| 540 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 541 | /* |
| 542 | * Do starting conversion up from non 512-byte blocksize with |
| 543 | * struct se_task SCSI blocksize into Linux/Block 512 units for BIO. |
| 544 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 545 | if (dev->se_sub_dev->se_dev_attrib.block_size == 4096) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 546 | block_lba = (task->task_lba << 3); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 547 | else if (dev->se_sub_dev->se_dev_attrib.block_size == 2048) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 548 | block_lba = (task->task_lba << 2); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 549 | else if (dev->se_sub_dev->se_dev_attrib.block_size == 1024) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 550 | block_lba = (task->task_lba << 1); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 551 | else if (dev->se_sub_dev->se_dev_attrib.block_size == 512) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 552 | block_lba = task->task_lba; |
| 553 | else { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 554 | pr_err("Unsupported SCSI -> BLOCK LBA conversion:" |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 555 | " %u\n", dev->se_sub_dev->se_dev_attrib.block_size); |
Nicholas Bellinger | 03e98c9 | 2011-11-04 02:36:16 -0700 | [diff] [blame] | 556 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 557 | return -ENOSYS; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 558 | } |
| 559 | |
Christoph Hellwig | dbbf3e9 | 2011-09-25 14:56:24 -0400 | [diff] [blame] | 560 | bio = iblock_get_bio(task, block_lba, sg_num); |
Nicholas Bellinger | 03e98c9 | 2011-11-04 02:36:16 -0700 | [diff] [blame] | 561 | if (!bio) { |
| 562 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 563 | return -ENOMEM; |
| 564 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 565 | |
Christoph Hellwig | dbbf3e9 | 2011-09-25 14:56:24 -0400 | [diff] [blame] | 566 | bio_list_init(&list); |
| 567 | bio_list_add(&list, bio); |
| 568 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 569 | for_each_sg(task->task_sg, sg, task->task_sg_nents, i) { |
Christoph Hellwig | dbbf3e9 | 2011-09-25 14:56:24 -0400 | [diff] [blame] | 570 | /* |
| 571 | * XXX: if the length the device accepts is shorter than the |
| 572 | * length of the S/G list entry this will cause and |
| 573 | * endless loop. Better hope no driver uses huge pages. |
| 574 | */ |
| 575 | while (bio_add_page(bio, sg_page(sg), sg->length, sg->offset) |
| 576 | != sg->length) { |
| 577 | bio = iblock_get_bio(task, block_lba, sg_num); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 578 | if (!bio) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 579 | goto fail; |
Christoph Hellwig | dbbf3e9 | 2011-09-25 14:56:24 -0400 | [diff] [blame] | 580 | bio_list_add(&list, bio); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 581 | } |
Christoph Hellwig | dbbf3e9 | 2011-09-25 14:56:24 -0400 | [diff] [blame] | 582 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 583 | /* Always in 512 byte units for Linux/Block */ |
| 584 | block_lba += sg->length >> IBLOCK_LBA_SHIFT; |
| 585 | sg_num--; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 586 | } |
| 587 | |
Christoph Hellwig | dbbf3e9 | 2011-09-25 14:56:24 -0400 | [diff] [blame] | 588 | blk_start_plug(&plug); |
| 589 | while ((bio = bio_list_pop(&list))) |
| 590 | submit_bio(rw, bio); |
| 591 | blk_finish_plug(&plug); |
| 592 | |
Nicholas Bellinger | 03e98c9 | 2011-11-04 02:36:16 -0700 | [diff] [blame] | 593 | return 0; |
Christoph Hellwig | dbbf3e9 | 2011-09-25 14:56:24 -0400 | [diff] [blame] | 594 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 595 | fail: |
Christoph Hellwig | dbbf3e9 | 2011-09-25 14:56:24 -0400 | [diff] [blame] | 596 | while ((bio = bio_list_pop(&list))) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 597 | bio_put(bio); |
Nicholas Bellinger | 03e98c9 | 2011-11-04 02:36:16 -0700 | [diff] [blame] | 598 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 599 | return -ENOMEM; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 600 | } |
| 601 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 602 | static u32 iblock_get_device_rev(struct se_device *dev) |
| 603 | { |
| 604 | return SCSI_SPC_2; /* Returns SPC-3 in Initiator Data */ |
| 605 | } |
| 606 | |
| 607 | static u32 iblock_get_device_type(struct se_device *dev) |
| 608 | { |
| 609 | return TYPE_DISK; |
| 610 | } |
| 611 | |
| 612 | static sector_t iblock_get_blocks(struct se_device *dev) |
| 613 | { |
| 614 | struct iblock_dev *ibd = dev->dev_ptr; |
| 615 | struct block_device *bd = ibd->ibd_bd; |
| 616 | struct request_queue *q = bdev_get_queue(bd); |
| 617 | |
| 618 | return iblock_emulate_read_cap_with_block_size(dev, bd, q); |
| 619 | } |
| 620 | |
| 621 | static void iblock_bio_done(struct bio *bio, int err) |
| 622 | { |
| 623 | struct se_task *task = bio->bi_private; |
| 624 | struct iblock_req *ibr = IBLOCK_REQ(task); |
Christoph Hellwig | dbbf3e9 | 2011-09-25 14:56:24 -0400 | [diff] [blame] | 625 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 626 | /* |
| 627 | * Set -EIO if !BIO_UPTODATE and the passed is still err=0 |
| 628 | */ |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 629 | if (!test_bit(BIO_UPTODATE, &bio->bi_flags) && !err) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 630 | err = -EIO; |
| 631 | |
| 632 | if (err != 0) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 633 | pr_err("test_bit(BIO_UPTODATE) failed for bio: %p," |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 634 | " err: %d\n", bio, err); |
| 635 | /* |
| 636 | * Bump the ib_bio_err_cnt and release bio. |
| 637 | */ |
| 638 | atomic_inc(&ibr->ib_bio_err_cnt); |
| 639 | smp_mb__after_atomic_inc(); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 640 | } |
Christoph Hellwig | dbbf3e9 | 2011-09-25 14:56:24 -0400 | [diff] [blame] | 641 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 642 | bio_put(bio); |
Christoph Hellwig | dbbf3e9 | 2011-09-25 14:56:24 -0400 | [diff] [blame] | 643 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 644 | if (!atomic_dec_and_test(&ibr->ib_bio_cnt)) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 645 | return; |
Christoph Hellwig | dbbf3e9 | 2011-09-25 14:56:24 -0400 | [diff] [blame] | 646 | |
| 647 | pr_debug("done[%p] bio: %p task_lba: %llu bio_lba: %llu err=%d\n", |
| 648 | task, bio, task->task_lba, |
| 649 | (unsigned long long)bio->bi_sector, err); |
| 650 | |
| 651 | transport_complete_task(task, !atomic_read(&ibr->ib_bio_err_cnt)); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 652 | } |
| 653 | |
| 654 | static struct se_subsystem_api iblock_template = { |
| 655 | .name = "iblock", |
| 656 | .owner = THIS_MODULE, |
| 657 | .transport_type = TRANSPORT_PLUGIN_VHBA_PDEV, |
Christoph Hellwig | f55918f | 2011-10-14 07:30:17 -0400 | [diff] [blame] | 658 | .write_cache_emulated = 1, |
| 659 | .fua_write_emulated = 1, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 660 | .attach_hba = iblock_attach_hba, |
| 661 | .detach_hba = iblock_detach_hba, |
| 662 | .allocate_virtdevice = iblock_allocate_virtdevice, |
| 663 | .create_virtdevice = iblock_create_virtdevice, |
| 664 | .free_device = iblock_free_device, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 665 | .alloc_task = iblock_alloc_task, |
| 666 | .do_task = iblock_do_task, |
| 667 | .do_discard = iblock_do_discard, |
| 668 | .do_sync_cache = iblock_emulate_sync_cache, |
| 669 | .free_task = iblock_free_task, |
| 670 | .check_configfs_dev_params = iblock_check_configfs_dev_params, |
| 671 | .set_configfs_dev_params = iblock_set_configfs_dev_params, |
| 672 | .show_configfs_dev_params = iblock_show_configfs_dev_params, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 673 | .get_device_rev = iblock_get_device_rev, |
| 674 | .get_device_type = iblock_get_device_type, |
| 675 | .get_blocks = iblock_get_blocks, |
| 676 | }; |
| 677 | |
| 678 | static int __init iblock_module_init(void) |
| 679 | { |
| 680 | return transport_subsystem_register(&iblock_template); |
| 681 | } |
| 682 | |
| 683 | static void iblock_module_exit(void) |
| 684 | { |
| 685 | transport_subsystem_release(&iblock_template); |
| 686 | } |
| 687 | |
| 688 | MODULE_DESCRIPTION("TCM IBLOCK subsystem plugin"); |
| 689 | MODULE_AUTHOR("nab@Linux-iSCSI.org"); |
| 690 | MODULE_LICENSE("GPL"); |
| 691 | |
| 692 | module_init(iblock_module_init); |
| 693 | module_exit(iblock_module_exit); |