* This file contains the Storage Engine <-> Linux BlockIO transport
* specific functions.
*
- * (c) Copyright 2003-2012 RisingTide Systems LLC.
+ * (c) Copyright 2003-2013 Datera, Inc.
*
* Nicholas A. Bellinger <nab@kernel.org>
*
#include <linux/genhd.h>
#include <linux/file.h>
#include <linux/module.h>
-#include <scsi/scsi.h>
-#include <scsi/scsi_host.h>
+#include <scsi/scsi_proto.h>
#include <asm/unaligned.h>
#include <target/target_core_base.h>
}
-static struct se_subsystem_api iblock_template;
-
-/* iblock_attach_hba(): (Part of se_subsystem_api_t template)
- *
- *
- */
static int iblock_attach_hba(struct se_hba *hba, u32 host_id)
{
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);
+ IBLOCK_VERSION, TARGET_CORE_VERSION);
return 0;
}
struct iblock_dev *ib_dev = IBLOCK_DEV(dev);
struct request_queue *q;
struct block_device *bd = NULL;
+ struct blk_integrity *bi;
fmode_t mode;
int ret = -ENOMEM;
mode = FMODE_READ|FMODE_EXCL;
if (!ib_dev->ibd_readonly)
mode |= FMODE_WRITE;
+ else
+ dev->dev_flags |= DF_READ_ONLY;
bd = blkdev_get_by_path(ib_dev->ibd_udev_path, mode, ib_dev);
if (IS_ERR(bd)) {
q = bdev_get_queue(bd);
dev->dev_attrib.hw_block_size = bdev_logical_block_size(bd);
- dev->dev_attrib.hw_max_sectors = UINT_MAX;
+ dev->dev_attrib.hw_max_sectors = queue_max_hw_sectors(q);
dev->dev_attrib.hw_queue_depth = q->nr_requests;
- /*
- * 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->dev_attrib.max_unmap_lba_count =
- q->limits.max_discard_sectors;
-
- /*
- * Currently hardcoded to 1 in Linux/SCSI code..
- */
- dev->dev_attrib.max_unmap_block_desc_count = 1;
- dev->dev_attrib.unmap_granularity =
- q->limits.discard_granularity >> 9;
- dev->dev_attrib.unmap_granularity_alignment =
- q->limits.discard_alignment;
-
+ if (target_configure_unmap_from_queue(&dev->dev_attrib, q))
pr_debug("IBLOCK: BLOCK Discard support available,"
- " disabled by default\n");
- }
+ " disabled by default\n");
+
/*
* Enable write same emulation for IBLOCK and use 0xFFFF as
* the smaller WRITE_SAME(10) only has a two-byte block count.
if (blk_queue_nonrot(q))
dev->dev_attrib.is_nonrot = 1;
+ bi = bdev_get_integrity(bd);
+ if (bi) {
+ struct bio_set *bs = ib_dev->ibd_bio_set;
+
+ if (!strcmp(bi->profile->name, "T10-DIF-TYPE3-IP") ||
+ !strcmp(bi->profile->name, "T10-DIF-TYPE1-IP")) {
+ pr_err("IBLOCK export of blk_integrity: %s not"
+ " supported\n", bi->profile->name);
+ ret = -ENOSYS;
+ goto out_blkdev_put;
+ }
+
+ if (!strcmp(bi->profile->name, "T10-DIF-TYPE3-CRC")) {
+ dev->dev_attrib.pi_prot_type = TARGET_DIF_TYPE3_PROT;
+ } else if (!strcmp(bi->profile->name, "T10-DIF-TYPE1-CRC")) {
+ dev->dev_attrib.pi_prot_type = TARGET_DIF_TYPE1_PROT;
+ }
+
+ if (dev->dev_attrib.pi_prot_type) {
+ if (bioset_integrity_create(bs, IBLOCK_BIO_POOL_SIZE) < 0) {
+ pr_err("Unable to allocate bioset for PI\n");
+ ret = -ENOMEM;
+ goto out_blkdev_put;
+ }
+ pr_debug("IBLOCK setup BIP bs->bio_integrity_pool: %p\n",
+ bs->bio_integrity_pool);
+ }
+ dev->dev_attrib.hw_pi_prot_type = dev->dev_attrib.pi_prot_type;
+ }
+
return 0;
+out_blkdev_put:
+ blkdev_put(ib_dev->ibd_bd, FMODE_WRITE|FMODE_READ|FMODE_EXCL);
out_free_bioset:
bioset_free(ib_dev->ibd_bio_set);
ib_dev->ibd_bio_set = NULL;
return ret;
}
+static void iblock_dev_call_rcu(struct rcu_head *p)
+{
+ struct se_device *dev = container_of(p, struct se_device, rcu_head);
+ struct iblock_dev *ib_dev = IBLOCK_DEV(dev);
+
+ kfree(ib_dev);
+}
+
static void iblock_free_device(struct se_device *dev)
{
struct iblock_dev *ib_dev = IBLOCK_DEV(dev);
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);
+
+ call_rcu(&dev->rcu_head, iblock_dev_call_rcu);
}
static unsigned long long iblock_emulate_read_cap_with_block_size(
kfree(ibr);
}
-static void iblock_bio_done(struct bio *bio, int err)
+static void iblock_bio_done(struct bio *bio)
{
struct se_cmd *cmd = bio->bi_private;
struct iblock_req *ibr = cmd->priv;
- /*
- * 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);
+ if (bio->bi_error) {
+ pr_err("bio error: %p, err: %d\n", bio, bio->bi_error);
/*
* Bump the ib_bio_err_cnt and release bio.
*/
atomic_inc(&ibr->ib_bio_err_cnt);
- smp_mb__after_atomic_inc();
+ smp_mb__after_atomic();
}
bio_put(bio);
bio->bi_bdev = ib_dev->ibd_bd;
bio->bi_private = cmd;
bio->bi_end_io = &iblock_bio_done;
- bio->bi_sector = lba;
+ bio->bi_iter.bi_sector = lba;
return bio;
}
blk_finish_plug(&plug);
}
-static void iblock_end_io_flush(struct bio *bio, int err)
+static void iblock_end_io_flush(struct bio *bio)
{
struct se_cmd *cmd = bio->bi_private;
- if (err)
- pr_err("IBLOCK: cache flush failed: %d\n", err);
+ if (bio->bi_error)
+ pr_err("IBLOCK: cache flush failed: %d\n", bio->bi_error);
if (cmd) {
- if (err)
+ if (bio->bi_error)
target_complete_cmd(cmd, SAM_STAT_CHECK_CONDITION);
else
target_complete_cmd(cmd, SAM_STAT_GOOD);
}
static sense_reason_t
-iblock_do_unmap(struct se_cmd *cmd, void *priv,
- sector_t lba, sector_t nolb)
+iblock_execute_unmap(struct se_cmd *cmd, sector_t lba, sector_t nolb)
{
- struct block_device *bdev = priv;
+ struct block_device *bdev = IBLOCK_DEV(cmd->se_dev)->ibd_bd;
+ struct se_device *dev = cmd->se_dev;
int ret;
- ret = blkdev_issue_discard(bdev, lba, nolb, GFP_KERNEL, 0);
+ ret = blkdev_issue_discard(bdev,
+ target_to_linux_sector(dev, lba),
+ target_to_linux_sector(dev, nolb),
+ GFP_KERNEL, 0);
if (ret < 0) {
pr_err("blkdev_issue_discard() failed: %d\n", ret);
return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
return 0;
}
-static sense_reason_t
-iblock_execute_unmap(struct se_cmd *cmd)
-{
- struct block_device *bdev = IBLOCK_DEV(cmd->se_dev)->ibd_bd;
-
- return sbc_execute_unmap(cmd, iblock_do_unmap, bdev);
-}
-
-static sense_reason_t
-iblock_execute_write_same_unmap(struct se_cmd *cmd)
-{
- struct block_device *bdev = IBLOCK_DEV(cmd->se_dev)->ibd_bd;
- sector_t lba = cmd->t_task_lba;
- sector_t nolb = sbc_get_write_same_sectors(cmd);
- int ret;
-
- ret = iblock_do_unmap(cmd, bdev, lba, nolb);
- if (ret)
- return ret;
-
- target_complete_cmd(cmd, GOOD);
- return 0;
-}
-
static sense_reason_t
iblock_execute_write_same(struct se_cmd *cmd)
{
struct scatterlist *sg;
struct bio *bio;
struct bio_list list;
- sector_t block_lba = cmd->t_task_lba;
- sector_t sectors = sbc_get_write_same_sectors(cmd);
+ struct se_device *dev = cmd->se_dev;
+ sector_t block_lba = target_to_linux_sector(dev, cmd->t_task_lba);
+ sector_t sectors = target_to_linux_sector(dev,
+ sbc_get_write_same_sectors(cmd));
+ if (cmd->prot_op) {
+ pr_err("WRITE_SAME: Protection information with IBLOCK"
+ " backends not supported\n");
+ return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+ }
sg = &cmd->t_data_sg[0];
if (cmd->t_data_nents > 1 ||
ret = -ENOMEM;
break;
}
- ret = strict_strtoul(arg_p, 0, &tmp_readonly);
+ ret = kstrtoul(arg_p, 0, &tmp_readonly);
kfree(arg_p);
if (ret < 0) {
- pr_err("strict_strtoul() failed for"
+ pr_err("kstrtoul() failed for"
" readonly=\n");
goto out;
}
return bl;
}
+static int
+iblock_alloc_bip(struct se_cmd *cmd, struct bio *bio)
+{
+ struct se_device *dev = cmd->se_dev;
+ struct blk_integrity *bi;
+ struct bio_integrity_payload *bip;
+ struct iblock_dev *ib_dev = IBLOCK_DEV(dev);
+ struct scatterlist *sg;
+ int i, rc;
+
+ bi = bdev_get_integrity(ib_dev->ibd_bd);
+ if (!bi) {
+ pr_err("Unable to locate bio_integrity\n");
+ return -ENODEV;
+ }
+
+ bip = bio_integrity_alloc(bio, GFP_NOIO, cmd->t_prot_nents);
+ if (!bip) {
+ pr_err("Unable to allocate bio_integrity_payload\n");
+ return -ENOMEM;
+ }
+
+ bip->bip_iter.bi_size = (cmd->data_length / dev->dev_attrib.block_size) *
+ dev->prot_length;
+ bip->bip_iter.bi_sector = bio->bi_iter.bi_sector;
+
+ pr_debug("IBLOCK BIP Size: %u Sector: %llu\n", bip->bip_iter.bi_size,
+ (unsigned long long)bip->bip_iter.bi_sector);
+
+ for_each_sg(cmd->t_prot_sg, sg, cmd->t_prot_nents, i) {
+
+ rc = bio_integrity_add_page(bio, sg_page(sg), sg->length,
+ sg->offset);
+ if (rc != sg->length) {
+ pr_err("bio_integrity_add_page() failed; %d\n", rc);
+ return -ENOMEM;
+ }
+
+ pr_debug("Added bio integrity page: %p length: %d offset; %d\n",
+ sg_page(sg), sg->length, sg->offset);
+ }
+
+ return 0;
+}
+
static sense_reason_t
-iblock_execute_rw(struct se_cmd *cmd)
+iblock_execute_rw(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents,
+ enum dma_data_direction data_direction)
{
- struct scatterlist *sgl = cmd->t_data_sg;
- u32 sgl_nents = cmd->t_data_nents;
- enum dma_data_direction data_direction = cmd->data_direction;
struct se_device *dev = cmd->se_dev;
+ sector_t block_lba = target_to_linux_sector(dev, cmd->t_task_lba);
struct iblock_req *ibr;
- struct bio *bio;
+ struct bio *bio, *bio_start;
struct bio_list list;
struct scatterlist *sg;
u32 sg_num = sgl_nents;
- sector_t block_lba;
unsigned bio_cnt;
int rw = 0;
int i;
rw = READ;
}
- /*
- * Convert the blocksize advertised to the initiator to the 512 byte
- * units unconditionally used by the Linux block layer.
- */
- if (dev->dev_attrib.block_size == 4096)
- block_lba = (cmd->t_task_lba << 3);
- else if (dev->dev_attrib.block_size == 2048)
- block_lba = (cmd->t_task_lba << 2);
- else if (dev->dev_attrib.block_size == 1024)
- block_lba = (cmd->t_task_lba << 1);
- else if (dev->dev_attrib.block_size == 512)
- block_lba = cmd->t_task_lba;
- else {
- pr_err("Unsupported SCSI -> BLOCK LBA conversion:"
- " %u\n", dev->dev_attrib.block_size);
- return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
- }
-
ibr = kzalloc(sizeof(struct iblock_req), GFP_KERNEL);
if (!ibr)
goto fail;
if (!bio)
goto fail_free_ibr;
+ bio_start = bio;
bio_list_init(&list);
bio_list_add(&list, bio);
sg_num--;
}
+ if (cmd->prot_type && dev->dev_attrib.pi_prot_type) {
+ int rc = iblock_alloc_bip(cmd, bio_start);
+ if (rc)
+ goto fail_put_bios;
+ }
+
iblock_submit_bios(&list, rw);
iblock_complete_cmd(cmd);
return 0;
return iblock_emulate_read_cap_with_block_size(dev, bd, q);
}
+static sector_t iblock_get_alignment_offset_lbas(struct se_device *dev)
+{
+ struct iblock_dev *ib_dev = IBLOCK_DEV(dev);
+ struct block_device *bd = ib_dev->ibd_bd;
+ int ret;
+
+ ret = bdev_alignment_offset(bd);
+ if (ret == -1)
+ return 0;
+
+ /* convert offset-bytes to offset-lbas */
+ return ret / bdev_logical_block_size(bd);
+}
+
+static unsigned int iblock_get_lbppbe(struct se_device *dev)
+{
+ struct iblock_dev *ib_dev = IBLOCK_DEV(dev);
+ struct block_device *bd = ib_dev->ibd_bd;
+ int logs_per_phys = bdev_physical_block_size(bd) / bdev_logical_block_size(bd);
+
+ return ilog2(logs_per_phys);
+}
+
+static unsigned int iblock_get_io_min(struct se_device *dev)
+{
+ struct iblock_dev *ib_dev = IBLOCK_DEV(dev);
+ struct block_device *bd = ib_dev->ibd_bd;
+
+ return bdev_io_min(bd);
+}
+
+static unsigned int iblock_get_io_opt(struct se_device *dev)
+{
+ struct iblock_dev *ib_dev = IBLOCK_DEV(dev);
+ struct block_device *bd = ib_dev->ibd_bd;
+
+ return bdev_io_opt(bd);
+}
+
static struct sbc_ops iblock_sbc_ops = {
.execute_rw = iblock_execute_rw,
.execute_sync_cache = iblock_execute_sync_cache,
.execute_write_same = iblock_execute_write_same,
- .execute_write_same_unmap = iblock_execute_write_same_unmap,
.execute_unmap = iblock_execute_unmap,
};
return sbc_parse_cdb(cmd, &iblock_sbc_ops);
}
-bool iblock_get_write_cache(struct se_device *dev)
+static bool iblock_get_write_cache(struct se_device *dev)
{
struct iblock_dev *ib_dev = IBLOCK_DEV(dev);
struct block_device *bd = ib_dev->ibd_bd;
return q->flush_flags & REQ_FLUSH;
}
-static struct se_subsystem_api iblock_template = {
+static const struct target_backend_ops iblock_ops = {
.name = "iblock",
.inquiry_prod = "IBLOCK",
.inquiry_rev = IBLOCK_VERSION,
.owner = THIS_MODULE,
- .transport_type = TRANSPORT_PLUGIN_VHBA_PDEV,
.attach_hba = iblock_attach_hba,
.detach_hba = iblock_detach_hba,
.alloc_device = iblock_alloc_device,
.show_configfs_dev_params = iblock_show_configfs_dev_params,
.get_device_type = sbc_get_device_type,
.get_blocks = iblock_get_blocks,
+ .get_alignment_offset_lbas = iblock_get_alignment_offset_lbas,
+ .get_lbppbe = iblock_get_lbppbe,
+ .get_io_min = iblock_get_io_min,
+ .get_io_opt = iblock_get_io_opt,
.get_write_cache = iblock_get_write_cache,
+ .tb_dev_attrib_attrs = sbc_attrib_attrs,
};
static int __init iblock_module_init(void)
{
- return transport_subsystem_register(&iblock_template);
+ return transport_backend_register(&iblock_ops);
}
static void __exit iblock_module_exit(void)
{
- transport_subsystem_release(&iblock_template);
+ target_backend_unregister(&iblock_ops);
}
MODULE_DESCRIPTION("TCM IBLOCK subsystem plugin");
projects / firefly-linux-kernel-4.4.55.git / blobdiff