| /******************************************************************************* |
| * Filename: target_core_iblock.c |
| * |
| * This file contains the Storage Engine <-> Linux BlockIO transport |
| * specific functions. |
| * |
| * Copyright (c) 2003, 2004, 2005 PyX Technologies, Inc. |
| * Copyright (c) 2005, 2006, 2007 SBE, Inc. |
| * Copyright (c) 2007-2010 Rising Tide Systems |
| * Copyright (c) 2008-2010 Linux-iSCSI.org |
| * |
| * Nicholas A. Bellinger <nab@kernel.org> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| * |
| ******************************************************************************/ |
| |
| #include <linux/string.h> |
| #include <linux/parser.h> |
| #include <linux/timer.h> |
| #include <linux/fs.h> |
| #include <linux/blkdev.h> |
| #include <linux/slab.h> |
| #include <linux/spinlock.h> |
| #include <linux/bio.h> |
| #include <linux/genhd.h> |
| #include <linux/file.h> |
| #include <scsi/scsi.h> |
| #include <scsi/scsi_host.h> |
| |
| #include <target/target_core_base.h> |
| #include <target/target_core_device.h> |
| #include <target/target_core_transport.h> |
| |
| #include "target_core_iblock.h" |
| |
| static struct se_subsystem_api iblock_template; |
| |
| static void iblock_bio_done(struct bio *, int); |
| |
| /* iblock_attach_hba(): (Part of se_subsystem_api_t template) |
| * |
| * |
| */ |
| static int iblock_attach_hba(struct se_hba *hba, u32 host_id) |
| { |
| struct iblock_hba *ib_host; |
| |
| ib_host = kzalloc(sizeof(struct iblock_hba), GFP_KERNEL); |
| if (!ib_host) { |
| pr_err("Unable to allocate memory for" |
| " struct iblock_hba\n"); |
| return -ENOMEM; |
| } |
| |
| ib_host->iblock_host_id = host_id; |
| |
| hba->hba_ptr = ib_host; |
| |
| pr_debug("CORE_HBA[%d] - TCM iBlock HBA Driver %s on" |
| " Generic Target Core Stack %s\n", hba->hba_id, |
| IBLOCK_VERSION, TARGET_CORE_MOD_VERSION); |
| |
| pr_debug("CORE_HBA[%d] - Attached iBlock HBA: %u to Generic\n", |
| hba->hba_id, ib_host->iblock_host_id); |
| |
| return 0; |
| } |
| |
| static void iblock_detach_hba(struct se_hba *hba) |
| { |
| struct iblock_hba *ib_host = hba->hba_ptr; |
| |
| pr_debug("CORE_HBA[%d] - Detached iBlock HBA: %u from Generic" |
| " Target Core\n", hba->hba_id, ib_host->iblock_host_id); |
| |
| kfree(ib_host); |
| hba->hba_ptr = NULL; |
| } |
| |
| static void *iblock_allocate_virtdevice(struct se_hba *hba, const char *name) |
| { |
| struct iblock_dev *ib_dev = NULL; |
| struct iblock_hba *ib_host = hba->hba_ptr; |
| |
| ib_dev = kzalloc(sizeof(struct iblock_dev), GFP_KERNEL); |
| if (!ib_dev) { |
| pr_err("Unable to allocate struct iblock_dev\n"); |
| return NULL; |
| } |
| ib_dev->ibd_host = ib_host; |
| |
| pr_debug( "IBLOCK: Allocated ib_dev for %s\n", name); |
| |
| return ib_dev; |
| } |
| |
| static struct se_device *iblock_create_virtdevice( |
| struct se_hba *hba, |
| struct se_subsystem_dev *se_dev, |
| void *p) |
| { |
| struct iblock_dev *ib_dev = p; |
| struct se_device *dev; |
| struct se_dev_limits dev_limits; |
| struct block_device *bd = NULL; |
| struct request_queue *q; |
| struct queue_limits *limits; |
| u32 dev_flags = 0; |
| int ret = -EINVAL; |
| |
| if (!ib_dev) { |
| pr_err("Unable to locate struct iblock_dev parameter\n"); |
| return ERR_PTR(ret); |
| } |
| memset(&dev_limits, 0, sizeof(struct se_dev_limits)); |
| /* |
| * These settings need to be made tunable.. |
| */ |
| ib_dev->ibd_bio_set = bioset_create(32, 64); |
| if (!ib_dev->ibd_bio_set) { |
| pr_err("IBLOCK: Unable to create bioset()\n"); |
| return ERR_PTR(-ENOMEM); |
| } |
| pr_debug("IBLOCK: Created bio_set()\n"); |
| /* |
| * iblock_check_configfs_dev_params() ensures that ib_dev->ibd_udev_path |
| * must already have been set in order for echo 1 > $HBA/$DEV/enable to run. |
| */ |
| pr_debug( "IBLOCK: Claiming struct block_device: %s\n", |
| ib_dev->ibd_udev_path); |
| |
| bd = blkdev_get_by_path(ib_dev->ibd_udev_path, |
| FMODE_WRITE|FMODE_READ|FMODE_EXCL, ib_dev); |
| if (IS_ERR(bd)) { |
| ret = PTR_ERR(bd); |
| goto failed; |
| } |
| /* |
| * Setup the local scope queue_limits from struct request_queue->limits |
| * to pass into transport_add_device_to_core_hba() as struct se_dev_limits. |
| */ |
| q = bdev_get_queue(bd); |
| limits = &dev_limits.limits; |
| limits->logical_block_size = bdev_logical_block_size(bd); |
| limits->max_hw_sectors = queue_max_hw_sectors(q); |
| limits->max_sectors = queue_max_sectors(q); |
| dev_limits.hw_queue_depth = q->nr_requests; |
| dev_limits.queue_depth = q->nr_requests; |
| |
| ib_dev->ibd_bd = bd; |
| |
| dev = transport_add_device_to_core_hba(hba, |
| &iblock_template, se_dev, dev_flags, ib_dev, |
| &dev_limits, "IBLOCK", IBLOCK_VERSION); |
| if (!dev) |
| goto failed; |
| |
| /* |
| * Check if the underlying struct block_device request_queue supports |
| * the QUEUE_FLAG_DISCARD bit for UNMAP/WRITE_SAME in SCSI + TRIM |
| * in ATA and we need to set TPE=1 |
| */ |
| if (blk_queue_discard(q)) { |
| dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count = |
| q->limits.max_discard_sectors; |
| /* |
| * Currently hardcoded to 1 in Linux/SCSI code.. |
| */ |
| dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count = 1; |
| dev->se_sub_dev->se_dev_attrib.unmap_granularity = |
| q->limits.discard_granularity; |
| dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment = |
| q->limits.discard_alignment; |
| |
| pr_debug("IBLOCK: BLOCK Discard support available," |
| " disabled by default\n"); |
| } |
| |
| if (blk_queue_nonrot(q)) |
| dev->se_sub_dev->se_dev_attrib.is_nonrot = 1; |
| |
| return dev; |
| |
| failed: |
| if (ib_dev->ibd_bio_set) { |
| bioset_free(ib_dev->ibd_bio_set); |
| ib_dev->ibd_bio_set = NULL; |
| } |
| ib_dev->ibd_bd = NULL; |
| return ERR_PTR(ret); |
| } |
| |
| static void iblock_free_device(void *p) |
| { |
| struct iblock_dev *ib_dev = p; |
| |
| if (ib_dev->ibd_bd != NULL) |
| blkdev_put(ib_dev->ibd_bd, FMODE_WRITE|FMODE_READ|FMODE_EXCL); |
| if (ib_dev->ibd_bio_set != NULL) |
| bioset_free(ib_dev->ibd_bio_set); |
| kfree(ib_dev); |
| } |
| |
| static inline struct iblock_req *IBLOCK_REQ(struct se_task *task) |
| { |
| return container_of(task, struct iblock_req, ib_task); |
| } |
| |
| static struct se_task * |
| iblock_alloc_task(unsigned char *cdb) |
| { |
| struct iblock_req *ib_req; |
| |
| ib_req = kzalloc(sizeof(struct iblock_req), GFP_KERNEL); |
| if (!ib_req) { |
| pr_err("Unable to allocate memory for struct iblock_req\n"); |
| return NULL; |
| } |
| |
| atomic_set(&ib_req->ib_bio_cnt, 0); |
| return &ib_req->ib_task; |
| } |
| |
| static unsigned long long iblock_emulate_read_cap_with_block_size( |
| struct se_device *dev, |
| struct block_device *bd, |
| struct request_queue *q) |
| { |
| unsigned long long blocks_long = (div_u64(i_size_read(bd->bd_inode), |
| bdev_logical_block_size(bd)) - 1); |
| u32 block_size = bdev_logical_block_size(bd); |
| |
| if (block_size == dev->se_sub_dev->se_dev_attrib.block_size) |
| return blocks_long; |
| |
| switch (block_size) { |
| case 4096: |
| switch (dev->se_sub_dev->se_dev_attrib.block_size) { |
| case 2048: |
| blocks_long <<= 1; |
| break; |
| case 1024: |
| blocks_long <<= 2; |
| break; |
| case 512: |
| blocks_long <<= 3; |
| default: |
| break; |
| } |
| break; |
| case 2048: |
| switch (dev->se_sub_dev->se_dev_attrib.block_size) { |
| case 4096: |
| blocks_long >>= 1; |
| break; |
| case 1024: |
| blocks_long <<= 1; |
| break; |
| case 512: |
| blocks_long <<= 2; |
| break; |
| default: |
| break; |
| } |
| break; |
| case 1024: |
| switch (dev->se_sub_dev->se_dev_attrib.block_size) { |
| case 4096: |
| blocks_long >>= 2; |
| break; |
| case 2048: |
| blocks_long >>= 1; |
| break; |
| case 512: |
| blocks_long <<= 1; |
| break; |
| default: |
| break; |
| } |
| break; |
| case 512: |
| switch (dev->se_sub_dev->se_dev_attrib.block_size) { |
| case 4096: |
| blocks_long >>= 3; |
| break; |
| case 2048: |
| blocks_long >>= 2; |
| break; |
| case 1024: |
| blocks_long >>= 1; |
| break; |
| default: |
| break; |
| } |
| break; |
| default: |
| break; |
| } |
| |
| return blocks_long; |
| } |
| |
| static void iblock_end_io_flush(struct bio *bio, int err) |
| { |
| struct se_cmd *cmd = bio->bi_private; |
| |
| if (err) |
| pr_err("IBLOCK: cache flush failed: %d\n", err); |
| |
| if (cmd) |
| transport_complete_sync_cache(cmd, err == 0); |
| bio_put(bio); |
| } |
| |
| /* |
| * Implement SYCHRONIZE CACHE. Note that we can't handle lba ranges and must |
| * always flush the whole cache. |
| */ |
| static void iblock_emulate_sync_cache(struct se_task *task) |
| { |
| struct se_cmd *cmd = task->task_se_cmd; |
| struct iblock_dev *ib_dev = cmd->se_dev->dev_ptr; |
| int immed = (cmd->t_task_cdb[1] & 0x2); |
| struct bio *bio; |
| |
| /* |
| * If the Immediate bit is set, queue up the GOOD response |
| * for this SYNCHRONIZE_CACHE op. |
| */ |
| if (immed) |
| transport_complete_sync_cache(cmd, 1); |
| |
| bio = bio_alloc(GFP_KERNEL, 0); |
| bio->bi_end_io = iblock_end_io_flush; |
| bio->bi_bdev = ib_dev->ibd_bd; |
| if (!immed) |
| bio->bi_private = cmd; |
| submit_bio(WRITE_FLUSH, bio); |
| } |
| |
| static int iblock_do_discard(struct se_device *dev, sector_t lba, u32 range) |
| { |
| struct iblock_dev *ibd = dev->dev_ptr; |
| struct block_device *bd = ibd->ibd_bd; |
| int barrier = 0; |
| |
| return blkdev_issue_discard(bd, lba, range, GFP_KERNEL, barrier); |
| } |
| |
| static void iblock_free_task(struct se_task *task) |
| { |
| kfree(IBLOCK_REQ(task)); |
| } |
| |
| enum { |
| Opt_udev_path, Opt_force, Opt_err |
| }; |
| |
| static match_table_t tokens = { |
| {Opt_udev_path, "udev_path=%s"}, |
| {Opt_force, "force=%d"}, |
| {Opt_err, NULL} |
| }; |
| |
| static ssize_t iblock_set_configfs_dev_params(struct se_hba *hba, |
| struct se_subsystem_dev *se_dev, |
| const char *page, ssize_t count) |
| { |
| struct iblock_dev *ib_dev = se_dev->se_dev_su_ptr; |
| char *orig, *ptr, *arg_p, *opts; |
| substring_t args[MAX_OPT_ARGS]; |
| int ret = 0, token; |
| |
| opts = kstrdup(page, GFP_KERNEL); |
| if (!opts) |
| return -ENOMEM; |
| |
| orig = opts; |
| |
| while ((ptr = strsep(&opts, ",")) != NULL) { |
| if (!*ptr) |
| continue; |
| |
| token = match_token(ptr, tokens, args); |
| switch (token) { |
| case Opt_udev_path: |
| if (ib_dev->ibd_bd) { |
| pr_err("Unable to set udev_path= while" |
| " ib_dev->ibd_bd exists\n"); |
| ret = -EEXIST; |
| goto out; |
| } |
| arg_p = match_strdup(&args[0]); |
| if (!arg_p) { |
| ret = -ENOMEM; |
| break; |
| } |
| snprintf(ib_dev->ibd_udev_path, SE_UDEV_PATH_LEN, |
| "%s", arg_p); |
| kfree(arg_p); |
| pr_debug("IBLOCK: Referencing UDEV path: %s\n", |
| ib_dev->ibd_udev_path); |
| ib_dev->ibd_flags |= IBDF_HAS_UDEV_PATH; |
| break; |
| case Opt_force: |
| break; |
| default: |
| break; |
| } |
| } |
| |
| out: |
| kfree(orig); |
| return (!ret) ? count : ret; |
| } |
| |
| static ssize_t iblock_check_configfs_dev_params( |
| struct se_hba *hba, |
| struct se_subsystem_dev *se_dev) |
| { |
| struct iblock_dev *ibd = se_dev->se_dev_su_ptr; |
| |
| if (!(ibd->ibd_flags & IBDF_HAS_UDEV_PATH)) { |
| pr_err("Missing udev_path= parameters for IBLOCK\n"); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| static ssize_t iblock_show_configfs_dev_params( |
| struct se_hba *hba, |
| struct se_subsystem_dev *se_dev, |
| char *b) |
| { |
| struct iblock_dev *ibd = se_dev->se_dev_su_ptr; |
| struct block_device *bd = ibd->ibd_bd; |
| char buf[BDEVNAME_SIZE]; |
| ssize_t bl = 0; |
| |
| if (bd) |
| bl += sprintf(b + bl, "iBlock device: %s", |
| bdevname(bd, buf)); |
| if (ibd->ibd_flags & IBDF_HAS_UDEV_PATH) { |
| bl += sprintf(b + bl, " UDEV PATH: %s\n", |
| ibd->ibd_udev_path); |
| } else |
| bl += sprintf(b + bl, "\n"); |
| |
| bl += sprintf(b + bl, " "); |
| if (bd) { |
| bl += sprintf(b + bl, "Major: %d Minor: %d %s\n", |
| MAJOR(bd->bd_dev), MINOR(bd->bd_dev), (!bd->bd_contains) ? |
| "" : (bd->bd_holder == (struct iblock_dev *)ibd) ? |
| "CLAIMED: IBLOCK" : "CLAIMED: OS"); |
| } else { |
| bl += sprintf(b + bl, "Major: 0 Minor: 0\n"); |
| } |
| |
| return bl; |
| } |
| |
| static void iblock_bio_destructor(struct bio *bio) |
| { |
| struct se_task *task = bio->bi_private; |
| struct iblock_dev *ib_dev = task->task_se_cmd->se_dev->dev_ptr; |
| |
| bio_free(bio, ib_dev->ibd_bio_set); |
| } |
| |
| static struct bio * |
| iblock_get_bio(struct se_task *task, sector_t lba, u32 sg_num) |
| { |
| struct iblock_dev *ib_dev = task->task_se_cmd->se_dev->dev_ptr; |
| struct iblock_req *ib_req = IBLOCK_REQ(task); |
| struct bio *bio; |
| |
| bio = bio_alloc_bioset(GFP_NOIO, sg_num, ib_dev->ibd_bio_set); |
| if (!bio) { |
| pr_err("Unable to allocate memory for bio\n"); |
| return NULL; |
| } |
| |
| pr_debug("Allocated bio: %p task_sg_nents: %u using ibd_bio_set:" |
| " %p\n", bio, task->task_sg_nents, ib_dev->ibd_bio_set); |
| pr_debug("Allocated bio: %p task_size: %u\n", bio, task->task_size); |
| |
| bio->bi_bdev = ib_dev->ibd_bd; |
| bio->bi_private = task; |
| bio->bi_destructor = iblock_bio_destructor; |
| bio->bi_end_io = &iblock_bio_done; |
| bio->bi_sector = lba; |
| atomic_inc(&ib_req->ib_bio_cnt); |
| |
| pr_debug("Set bio->bi_sector: %llu\n", (unsigned long long)bio->bi_sector); |
| pr_debug("Set ib_req->ib_bio_cnt: %d\n", |
| atomic_read(&ib_req->ib_bio_cnt)); |
| return bio; |
| } |
| |
| static int iblock_do_task(struct se_task *task) |
| { |
| struct se_cmd *cmd = task->task_se_cmd; |
| struct se_device *dev = cmd->se_dev; |
| struct bio *bio; |
| struct bio_list list; |
| struct scatterlist *sg; |
| u32 i, sg_num = task->task_sg_nents; |
| sector_t block_lba; |
| struct blk_plug plug; |
| int rw; |
| |
| if (task->task_data_direction == DMA_TO_DEVICE) { |
| /* |
| * Force data to disk if we pretend to not have a volatile |
| * write cache, or the initiator set the Force Unit Access bit. |
| */ |
| if (dev->se_sub_dev->se_dev_attrib.emulate_write_cache == 0 || |
| (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0 && |
| task->task_se_cmd->t_tasks_fua)) |
| rw = WRITE_FUA; |
| else |
| rw = WRITE; |
| } else { |
| rw = READ; |
| } |
| |
| /* |
| * Do starting conversion up from non 512-byte blocksize with |
| * struct se_task SCSI blocksize into Linux/Block 512 units for BIO. |
| */ |
| if (dev->se_sub_dev->se_dev_attrib.block_size == 4096) |
| block_lba = (task->task_lba << 3); |
| else if (dev->se_sub_dev->se_dev_attrib.block_size == 2048) |
| block_lba = (task->task_lba << 2); |
| else if (dev->se_sub_dev->se_dev_attrib.block_size == 1024) |
| block_lba = (task->task_lba << 1); |
| else if (dev->se_sub_dev->se_dev_attrib.block_size == 512) |
| block_lba = task->task_lba; |
| else { |
| pr_err("Unsupported SCSI -> BLOCK LBA conversion:" |
| " %u\n", dev->se_sub_dev->se_dev_attrib.block_size); |
| return PYX_TRANSPORT_LU_COMM_FAILURE; |
| } |
| |
| bio = iblock_get_bio(task, block_lba, sg_num); |
| if (!bio) |
| return PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES; |
| |
| bio_list_init(&list); |
| bio_list_add(&list, bio); |
| |
| for_each_sg(task->task_sg, sg, task->task_sg_nents, i) { |
| /* |
| * XXX: if the length the device accepts is shorter than the |
| * length of the S/G list entry this will cause and |
| * endless loop. Better hope no driver uses huge pages. |
| */ |
| while (bio_add_page(bio, sg_page(sg), sg->length, sg->offset) |
| != sg->length) { |
| bio = iblock_get_bio(task, block_lba, sg_num); |
| if (!bio) |
| goto fail; |
| bio_list_add(&list, bio); |
| } |
| |
| /* Always in 512 byte units for Linux/Block */ |
| block_lba += sg->length >> IBLOCK_LBA_SHIFT; |
| sg_num--; |
| } |
| |
| blk_start_plug(&plug); |
| while ((bio = bio_list_pop(&list))) |
| submit_bio(rw, bio); |
| blk_finish_plug(&plug); |
| |
| return PYX_TRANSPORT_SENT_TO_TRANSPORT; |
| |
| fail: |
| while ((bio = bio_list_pop(&list))) |
| bio_put(bio); |
| return PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES; |
| } |
| |
| static u32 iblock_get_device_rev(struct se_device *dev) |
| { |
| return SCSI_SPC_2; /* Returns SPC-3 in Initiator Data */ |
| } |
| |
| static u32 iblock_get_device_type(struct se_device *dev) |
| { |
| return TYPE_DISK; |
| } |
| |
| static sector_t iblock_get_blocks(struct se_device *dev) |
| { |
| struct iblock_dev *ibd = dev->dev_ptr; |
| struct block_device *bd = ibd->ibd_bd; |
| struct request_queue *q = bdev_get_queue(bd); |
| |
| return iblock_emulate_read_cap_with_block_size(dev, bd, q); |
| } |
| |
| static void iblock_bio_done(struct bio *bio, int err) |
| { |
| struct se_task *task = bio->bi_private; |
| struct iblock_req *ibr = IBLOCK_REQ(task); |
| |
| /* |
| * Set -EIO if !BIO_UPTODATE and the passed is still err=0 |
| */ |
| if (!test_bit(BIO_UPTODATE, &bio->bi_flags) && !err) |
| err = -EIO; |
| |
| if (err != 0) { |
| pr_err("test_bit(BIO_UPTODATE) failed for bio: %p," |
| " err: %d\n", bio, err); |
| /* |
| * Bump the ib_bio_err_cnt and release bio. |
| */ |
| atomic_inc(&ibr->ib_bio_err_cnt); |
| smp_mb__after_atomic_inc(); |
| } |
| |
| bio_put(bio); |
| |
| if (!atomic_dec_and_test(&ibr->ib_bio_cnt)) |
| return; |
| |
| pr_debug("done[%p] bio: %p task_lba: %llu bio_lba: %llu err=%d\n", |
| task, bio, task->task_lba, |
| (unsigned long long)bio->bi_sector, err); |
| |
| transport_complete_task(task, !atomic_read(&ibr->ib_bio_err_cnt)); |
| } |
| |
| static struct se_subsystem_api iblock_template = { |
| .name = "iblock", |
| .owner = THIS_MODULE, |
| .transport_type = TRANSPORT_PLUGIN_VHBA_PDEV, |
| .write_cache_emulated = 1, |
| .fua_write_emulated = 1, |
| .attach_hba = iblock_attach_hba, |
| .detach_hba = iblock_detach_hba, |
| .allocate_virtdevice = iblock_allocate_virtdevice, |
| .create_virtdevice = iblock_create_virtdevice, |
| .free_device = iblock_free_device, |
| .alloc_task = iblock_alloc_task, |
| .do_task = iblock_do_task, |
| .do_discard = iblock_do_discard, |
| .do_sync_cache = iblock_emulate_sync_cache, |
| .free_task = iblock_free_task, |
| .check_configfs_dev_params = iblock_check_configfs_dev_params, |
| .set_configfs_dev_params = iblock_set_configfs_dev_params, |
| .show_configfs_dev_params = iblock_show_configfs_dev_params, |
| .get_device_rev = iblock_get_device_rev, |
| .get_device_type = iblock_get_device_type, |
| .get_blocks = iblock_get_blocks, |
| }; |
| |
| static int __init iblock_module_init(void) |
| { |
| return transport_subsystem_register(&iblock_template); |
| } |
| |
| static void iblock_module_exit(void) |
| { |
| transport_subsystem_release(&iblock_template); |
| } |
| |
| MODULE_DESCRIPTION("TCM IBLOCK subsystem plugin"); |
| MODULE_AUTHOR("nab@Linux-iSCSI.org"); |
| MODULE_LICENSE("GPL"); |
| |
| module_init(iblock_module_init); |
| module_exit(iblock_module_exit); |