Moved, renamed, and deleted files

The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.

1 files changed, 0 insertions, 1126 deletions

diff --git a/ANDROID_3.4.5/block/bsg.c b/ANDROID_3.4.5/block/bsg.c
deleted file mode 100644
index ff64ae3b..00000000
--- a/ANDROID_3.4.5/block/bsg.c
+++ /dev/null
@@ -1,1126 +0,0 @@
-/*
- * bsg.c - block layer implementation of the sg v4 interface
- *
- * Copyright (C) 2004 Jens Axboe <axboe@suse.de> SUSE Labs
- * Copyright (C) 2004 Peter M. Jones <pjones@redhat.com>
- *
- *  This file is subject to the terms and conditions of the GNU General Public
- *  License version 2.  See the file "COPYING" in the main directory of this
- *  archive for more details.
- *
- */
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/file.h>
-#include <linux/blkdev.h>
-#include <linux/poll.h>
-#include <linux/cdev.h>
-#include <linux/jiffies.h>
-#include <linux/percpu.h>
-#include <linux/uio.h>
-#include <linux/idr.h>
-#include <linux/bsg.h>
-#include <linux/slab.h>
-
-#include <scsi/scsi.h>
-#include <scsi/scsi_ioctl.h>
-#include <scsi/scsi_cmnd.h>
-#include <scsi/scsi_device.h>
-#include <scsi/scsi_driver.h>
-#include <scsi/sg.h>
-
-#define BSG_DESCRIPTION	"Block layer SCSI generic (bsg) driver"
-#define BSG_VERSION	"0.4"
-
-struct bsg_device {
-	struct request_queue *queue;
-	spinlock_t lock;
-	struct list_head busy_list;
-	struct list_head done_list;
-	struct hlist_node dev_list;
-	atomic_t ref_count;
-	int queued_cmds;
-	int done_cmds;
-	wait_queue_head_t wq_done;
-	wait_queue_head_t wq_free;
-	char name[20];
-	int max_queue;
-	unsigned long flags;
-};
-
-enum {
-	BSG_F_BLOCK		= 1,
-};
-
-#define BSG_DEFAULT_CMDS	64
-#define BSG_MAX_DEVS		32768
-
-#undef BSG_DEBUG
-
-#ifdef BSG_DEBUG
-#define dprintk(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ##args)
-#else
-#define dprintk(fmt, args...)
-#endif
-
-static DEFINE_MUTEX(bsg_mutex);
-static DEFINE_IDR(bsg_minor_idr);
-
-#define BSG_LIST_ARRAY_SIZE	8
-static struct hlist_head bsg_device_list[BSG_LIST_ARRAY_SIZE];
-
-static struct class *bsg_class;
-static int bsg_major;
-
-static struct kmem_cache *bsg_cmd_cachep;
-
-/*
- * our internal command type
- */
-struct bsg_command {
-	struct bsg_device *bd;
-	struct list_head list;
-	struct request *rq;
-	struct bio *bio;
-	struct bio *bidi_bio;
-	int err;
-	struct sg_io_v4 hdr;
-	char sense[SCSI_SENSE_BUFFERSIZE];
-};
-
-static void bsg_free_command(struct bsg_command *bc)
-{
-	struct bsg_device *bd = bc->bd;
-	unsigned long flags;
-
-	kmem_cache_free(bsg_cmd_cachep, bc);
-
-	spin_lock_irqsave(&bd->lock, flags);
-	bd->queued_cmds--;
-	spin_unlock_irqrestore(&bd->lock, flags);
-
-	wake_up(&bd->wq_free);
-}
-
-static struct bsg_command *bsg_alloc_command(struct bsg_device *bd)
-{
-	struct bsg_command *bc = ERR_PTR(-EINVAL);
-
-	spin_lock_irq(&bd->lock);
-
-	if (bd->queued_cmds >= bd->max_queue)
-		goto out;
-
-	bd->queued_cmds++;
-	spin_unlock_irq(&bd->lock);
-
-	bc = kmem_cache_zalloc(bsg_cmd_cachep, GFP_KERNEL);
-	if (unlikely(!bc)) {
-		spin_lock_irq(&bd->lock);
-		bd->queued_cmds--;
-		bc = ERR_PTR(-ENOMEM);
-		goto out;
-	}
-
-	bc->bd = bd;
-	INIT_LIST_HEAD(&bc->list);
-	dprintk("%s: returning free cmd %p\n", bd->name, bc);
-	return bc;
-out:
-	spin_unlock_irq(&bd->lock);
-	return bc;
-}
-
-static inline struct hlist_head *bsg_dev_idx_hash(int index)
-{
-	return &bsg_device_list[index & (BSG_LIST_ARRAY_SIZE - 1)];
-}
-
-static int bsg_io_schedule(struct bsg_device *bd)
-{
-	DEFINE_WAIT(wait);
-	int ret = 0;
-
-	spin_lock_irq(&bd->lock);
-
-	BUG_ON(bd->done_cmds > bd->queued_cmds);
-
-	/*
-	 * -ENOSPC or -ENODATA?  I'm going for -ENODATA, meaning "I have no
-	 * work to do", even though we return -ENOSPC after this same test
-	 * during bsg_write() -- there, it means our buffer can't have more
-	 * bsg_commands added to it, thus has no space left.
-	 */
-	if (bd->done_cmds == bd->queued_cmds) {
-		ret = -ENODATA;
-		goto unlock;
-	}
-
-	if (!test_bit(BSG_F_BLOCK, &bd->flags)) {
-		ret = -EAGAIN;
-		goto unlock;
-	}
-
-	prepare_to_wait(&bd->wq_done, &wait, TASK_UNINTERRUPTIBLE);
-	spin_unlock_irq(&bd->lock);
-	io_schedule();
-	finish_wait(&bd->wq_done, &wait);
-
-	return ret;
-unlock:
-	spin_unlock_irq(&bd->lock);
-	return ret;
-}
-
-static int blk_fill_sgv4_hdr_rq(struct request_queue *q, struct request *rq,
-				struct sg_io_v4 *hdr, struct bsg_device *bd,
-				fmode_t has_write_perm)
-{
-	if (hdr->request_len > BLK_MAX_CDB) {
-		rq->cmd = kzalloc(hdr->request_len, GFP_KERNEL);
-		if (!rq->cmd)
-			return -ENOMEM;
-	}
-
-	if (copy_from_user(rq->cmd, (void __user *)(unsigned long)hdr->request,
-			   hdr->request_len))
-		return -EFAULT;
-
-	if (hdr->subprotocol == BSG_SUB_PROTOCOL_SCSI_CMD) {
-		if (blk_verify_command(rq->cmd, has_write_perm))
-			return -EPERM;
-	} else if (!capable(CAP_SYS_RAWIO))
-		return -EPERM;
-
-	/*
-	 * fill in request structure
-	 */
-	rq->cmd_len = hdr->request_len;
-	rq->cmd_type = REQ_TYPE_BLOCK_PC;
-
-	rq->timeout = msecs_to_jiffies(hdr->timeout);
-	if (!rq->timeout)
-		rq->timeout = q->sg_timeout;
-	if (!rq->timeout)
-		rq->timeout = BLK_DEFAULT_SG_TIMEOUT;
-	if (rq->timeout < BLK_MIN_SG_TIMEOUT)
-		rq->timeout = BLK_MIN_SG_TIMEOUT;
-
-	return 0;
-}
-
-/*
- * Check if sg_io_v4 from user is allowed and valid
- */
-static int
-bsg_validate_sgv4_hdr(struct request_queue *q, struct sg_io_v4 *hdr, int *rw)
-{
-	int ret = 0;
-
-	if (hdr->guard != 'Q')
-		return -EINVAL;
-
-	switch (hdr->protocol) {
-	case BSG_PROTOCOL_SCSI:
-		switch (hdr->subprotocol) {
-		case BSG_SUB_PROTOCOL_SCSI_CMD:
-		case BSG_SUB_PROTOCOL_SCSI_TRANSPORT:
-			break;
-		default:
-			ret = -EINVAL;
-		}
-		break;
-	default:
-		ret = -EINVAL;
-	}
-
-	*rw = hdr->dout_xfer_len ? WRITE : READ;
-	return ret;
-}
-
-/*
- * map sg_io_v4 to a request.
- */
-static struct request *
-bsg_map_hdr(struct bsg_device *bd, struct sg_io_v4 *hdr, fmode_t has_write_perm,
-	    u8 *sense)
-{
-	struct request_queue *q = bd->queue;
-	struct request *rq, *next_rq = NULL;
-	int ret, rw;
-	unsigned int dxfer_len;
-	void __user *dxferp = NULL;
-	struct bsg_class_device *bcd = &q->bsg_dev;
-
-	/* if the LLD has been removed then the bsg_unregister_queue will
-	 * eventually be called and the class_dev was freed, so we can no
-	 * longer use this request_queue. Return no such address.
-	 */
-	if (!bcd->class_dev)
-		return ERR_PTR(-ENXIO);
-
-	dprintk("map hdr %llx/%u %llx/%u\n", (unsigned long long) hdr->dout_xferp,
-		hdr->dout_xfer_len, (unsigned long long) hdr->din_xferp,
-		hdr->din_xfer_len);
-
-	ret = bsg_validate_sgv4_hdr(q, hdr, &rw);
-	if (ret)
-		return ERR_PTR(ret);
-
-	/*
-	 * map scatter-gather elements separately and string them to request
-	 */
-	rq = blk_get_request(q, rw, GFP_KERNEL);
-	if (!rq)
-		return ERR_PTR(-ENOMEM);
-	ret = blk_fill_sgv4_hdr_rq(q, rq, hdr, bd, has_write_perm);
-	if (ret)
-		goto out;
-
-	if (rw == WRITE && hdr->din_xfer_len) {
-		if (!test_bit(QUEUE_FLAG_BIDI, &q->queue_flags)) {
-			ret = -EOPNOTSUPP;
-			goto out;
-		}
-
-		next_rq = blk_get_request(q, READ, GFP_KERNEL);
-		if (!next_rq) {
-			ret = -ENOMEM;
-			goto out;
-		}
-		rq->next_rq = next_rq;
-		next_rq->cmd_type = rq->cmd_type;
-
-		dxferp = (void __user *)(unsigned long)hdr->din_xferp;
-		ret =  blk_rq_map_user(q, next_rq, NULL, dxferp,
-				       hdr->din_xfer_len, GFP_KERNEL);
-		if (ret)
-			goto out;
-	}
-
-	if (hdr->dout_xfer_len) {
-		dxfer_len = hdr->dout_xfer_len;
-		dxferp = (void __user *)(unsigned long)hdr->dout_xferp;
-	} else if (hdr->din_xfer_len) {
-		dxfer_len = hdr->din_xfer_len;
-		dxferp = (void __user *)(unsigned long)hdr->din_xferp;
-	} else
-		dxfer_len = 0;
-
-	if (dxfer_len) {
-		ret = blk_rq_map_user(q, rq, NULL, dxferp, dxfer_len,
-				      GFP_KERNEL);
-		if (ret)
-			goto out;
-	}
-
-	rq->sense = sense;
-	rq->sense_len = 0;
-
-	return rq;
-out:
-	if (rq->cmd != rq->__cmd)
-		kfree(rq->cmd);
-	blk_put_request(rq);
-	if (next_rq) {
-		blk_rq_unmap_user(next_rq->bio);
-		blk_put_request(next_rq);
-	}
-	return ERR_PTR(ret);
-}
-
-/*
- * async completion call-back from the block layer, when scsi/ide/whatever
- * calls end_that_request_last() on a request
- */
-static void bsg_rq_end_io(struct request *rq, int uptodate)
-{
-	struct bsg_command *bc = rq->end_io_data;
-	struct bsg_device *bd = bc->bd;
-	unsigned long flags;
-
-	dprintk("%s: finished rq %p bc %p, bio %p stat %d\n",
-		bd->name, rq, bc, bc->bio, uptodate);
-
-	bc->hdr.duration = jiffies_to_msecs(jiffies - bc->hdr.duration);
-
-	spin_lock_irqsave(&bd->lock, flags);
-	list_move_tail(&bc->list, &bd->done_list);
-	bd->done_cmds++;
-	spin_unlock_irqrestore(&bd->lock, flags);
-
-	wake_up(&bd->wq_done);
-}
-
-/*
- * do final setup of a 'bc' and submit the matching 'rq' to the block
- * layer for io
- */
-static void bsg_add_command(struct bsg_device *bd, struct request_queue *q,
-			    struct bsg_command *bc, struct request *rq)
-{
-	int at_head = (0 == (bc->hdr.flags & BSG_FLAG_Q_AT_TAIL));
-
-	/*
-	 * add bc command to busy queue and submit rq for io
-	 */
-	bc->rq = rq;
-	bc->bio = rq->bio;
-	if (rq->next_rq)
-		bc->bidi_bio = rq->next_rq->bio;
-	bc->hdr.duration = jiffies;
-	spin_lock_irq(&bd->lock);
-	list_add_tail(&bc->list, &bd->busy_list);
-	spin_unlock_irq(&bd->lock);
-
-	dprintk("%s: queueing rq %p, bc %p\n", bd->name, rq, bc);
-
-	rq->end_io_data = bc;
-	blk_execute_rq_nowait(q, NULL, rq, at_head, bsg_rq_end_io);
-}
-
-static struct bsg_command *bsg_next_done_cmd(struct bsg_device *bd)
-{
-	struct bsg_command *bc = NULL;
-
-	spin_lock_irq(&bd->lock);
-	if (bd->done_cmds) {
-		bc = list_first_entry(&bd->done_list, struct bsg_command, list);
-		list_del(&bc->list);
-		bd->done_cmds--;
-	}
-	spin_unlock_irq(&bd->lock);
-
-	return bc;
-}
-
-/*
- * Get a finished command from the done list
- */
-static struct bsg_command *bsg_get_done_cmd(struct bsg_device *bd)
-{
-	struct bsg_command *bc;
-	int ret;
-
-	do {
-		bc = bsg_next_done_cmd(bd);
-		if (bc)
-			break;
-
-		if (!test_bit(BSG_F_BLOCK, &bd->flags)) {
-			bc = ERR_PTR(-EAGAIN);
-			break;
-		}
-
-		ret = wait_event_interruptible(bd->wq_done, bd->done_cmds);
-		if (ret) {
-			bc = ERR_PTR(-ERESTARTSYS);
-			break;
-		}
-	} while (1);
-
-	dprintk("%s: returning done %p\n", bd->name, bc);
-
-	return bc;
-}
-
-static int blk_complete_sgv4_hdr_rq(struct request *rq, struct sg_io_v4 *hdr,
-				    struct bio *bio, struct bio *bidi_bio)
-{
-	int ret = 0;
-
-	dprintk("rq %p bio %p 0x%x\n", rq, bio, rq->errors);
-	/*
-	 * fill in all the output members
-	 */
-	hdr->device_status = rq->errors & 0xff;
-	hdr->transport_status = host_byte(rq->errors);
-	hdr->driver_status = driver_byte(rq->errors);
-	hdr->info = 0;
-	if (hdr->device_status || hdr->transport_status || hdr->driver_status)
-		hdr->info |= SG_INFO_CHECK;
-	hdr->response_len = 0;
-
-	if (rq->sense_len && hdr->response) {
-		int len = min_t(unsigned int, hdr->max_response_len,
-					rq->sense_len);
-
-		ret = copy_to_user((void __user *)(unsigned long)hdr->response,
-				   rq->sense, len);
-		if (!ret)
-			hdr->response_len = len;
-		else
-			ret = -EFAULT;
-	}
-
-	if (rq->next_rq) {
-		hdr->dout_resid = rq->resid_len;
-		hdr->din_resid = rq->next_rq->resid_len;
-		blk_rq_unmap_user(bidi_bio);
-		blk_put_request(rq->next_rq);
-	} else if (rq_data_dir(rq) == READ)
-		hdr->din_resid = rq->resid_len;
-	else
-		hdr->dout_resid = rq->resid_len;
-
-	/*
-	 * If the request generated a negative error number, return it
-	 * (providing we aren't already returning an error); if it's
-	 * just a protocol response (i.e. non negative), that gets
-	 * processed above.
-	 */
-	if (!ret && rq->errors < 0)
-		ret = rq->errors;
-
-	blk_rq_unmap_user(bio);
-	if (rq->cmd != rq->__cmd)
-		kfree(rq->cmd);
-	blk_put_request(rq);
-
-	return ret;
-}
-
-static int bsg_complete_all_commands(struct bsg_device *bd)
-{
-	struct bsg_command *bc;
-	int ret, tret;
-
-	dprintk("%s: entered\n", bd->name);
-
-	/*
-	 * wait for all commands to complete
-	 */
-	ret = 0;
-	do {
-		ret = bsg_io_schedule(bd);
-		/*
-		 * look for -ENODATA specifically -- we'll sometimes get
-		 * -ERESTARTSYS when we've taken a signal, but we can't
-		 * return until we're done freeing the queue, so ignore
-		 * it.  The signal will get handled when we're done freeing
-		 * the bsg_device.
-		 */
-	} while (ret != -ENODATA);
-
-	/*
-	 * discard done commands
-	 */
-	ret = 0;
-	do {
-		spin_lock_irq(&bd->lock);
-		if (!bd->queued_cmds) {
-			spin_unlock_irq(&bd->lock);
-			break;
-		}
-		spin_unlock_irq(&bd->lock);
-
-		bc = bsg_get_done_cmd(bd);
-		if (IS_ERR(bc))
-			break;
-
-		tret = blk_complete_sgv4_hdr_rq(bc->rq, &bc->hdr, bc->bio,
-						bc->bidi_bio);
-		if (!ret)
-			ret = tret;
-
-		bsg_free_command(bc);
-	} while (1);
-
-	return ret;
-}
-
-static int
-__bsg_read(char __user *buf, size_t count, struct bsg_device *bd,
-	   const struct iovec *iov, ssize_t *bytes_read)
-{
-	struct bsg_command *bc;
-	int nr_commands, ret;
-
-	if (count % sizeof(struct sg_io_v4))
-		return -EINVAL;
-
-	ret = 0;
-	nr_commands = count / sizeof(struct sg_io_v4);
-	while (nr_commands) {
-		bc = bsg_get_done_cmd(bd);
-		if (IS_ERR(bc)) {
-			ret = PTR_ERR(bc);
-			break;
-		}
-
-		/*
-		 * this is the only case where we need to copy data back
-		 * after completing the request. so do that here,
-		 * bsg_complete_work() cannot do that for us
-		 */
-		ret = blk_complete_sgv4_hdr_rq(bc->rq, &bc->hdr, bc->bio,
-					       bc->bidi_bio);
-
-		if (copy_to_user(buf, &bc->hdr, sizeof(bc->hdr)))
-			ret = -EFAULT;
-
-		bsg_free_command(bc);
-
-		if (ret)
-			break;
-
-		buf += sizeof(struct sg_io_v4);
-		*bytes_read += sizeof(struct sg_io_v4);
-		nr_commands--;
-	}
-
-	return ret;
-}
-
-static inline void bsg_set_block(struct bsg_device *bd, struct file *file)
-{
-	if (file->f_flags & O_NONBLOCK)
-		clear_bit(BSG_F_BLOCK, &bd->flags);
-	else
-		set_bit(BSG_F_BLOCK, &bd->flags);
-}
-
-/*
- * Check if the error is a "real" error that we should return.
- */
-static inline int err_block_err(int ret)
-{
-	if (ret && ret != -ENOSPC && ret != -ENODATA && ret != -EAGAIN)
-		return 1;
-
-	return 0;
-}
-
-static ssize_t
-bsg_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
-{
-	struct bsg_device *bd = file->private_data;
-	int ret;
-	ssize_t bytes_read;
-
-	dprintk("%s: read %Zd bytes\n", bd->name, count);
-
-	bsg_set_block(bd, file);
-
-	bytes_read = 0;
-	ret = __bsg_read(buf, count, bd, NULL, &bytes_read);
-	*ppos = bytes_read;
-
-	if (!bytes_read || err_block_err(ret))
-		bytes_read = ret;
-
-	return bytes_read;
-}
-
-static int __bsg_write(struct bsg_device *bd, const char __user *buf,
-		       size_t count, ssize_t *bytes_written,
-		       fmode_t has_write_perm)
-{
-	struct bsg_command *bc;
-	struct request *rq;
-	int ret, nr_commands;
-
-	if (count % sizeof(struct sg_io_v4))
-		return -EINVAL;
-
-	nr_commands = count / sizeof(struct sg_io_v4);
-	rq = NULL;
-	bc = NULL;
-	ret = 0;
-	while (nr_commands) {
-		struct request_queue *q = bd->queue;
-
-		bc = bsg_alloc_command(bd);
-		if (IS_ERR(bc)) {
-			ret = PTR_ERR(bc);
-			bc = NULL;
-			break;
-		}
-
-		if (copy_from_user(&bc->hdr, buf, sizeof(bc->hdr))) {
-			ret = -EFAULT;
-			break;
-		}
-
-		/*
-		 * get a request, fill in the blanks, and add to request queue
-		 */
-		rq = bsg_map_hdr(bd, &bc->hdr, has_write_perm, bc->sense);
-		if (IS_ERR(rq)) {
-			ret = PTR_ERR(rq);
-			rq = NULL;
-			break;
-		}
-
-		bsg_add_command(bd, q, bc, rq);
-		bc = NULL;
-		rq = NULL;
-		nr_commands--;
-		buf += sizeof(struct sg_io_v4);
-		*bytes_written += sizeof(struct sg_io_v4);
-	}
-
-	if (bc)
-		bsg_free_command(bc);
-
-	return ret;
-}
-
-static ssize_t
-bsg_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
-{
-	struct bsg_device *bd = file->private_data;
-	ssize_t bytes_written;
-	int ret;
-
-	dprintk("%s: write %Zd bytes\n", bd->name, count);
-
-	bsg_set_block(bd, file);
-
-	bytes_written = 0;
-	ret = __bsg_write(bd, buf, count, &bytes_written,
-			  file->f_mode & FMODE_WRITE);
-
-	*ppos = bytes_written;
-
-	/*
-	 * return bytes written on non-fatal errors
-	 */
-	if (!bytes_written || err_block_err(ret))
-		bytes_written = ret;
-
-	dprintk("%s: returning %Zd\n", bd->name, bytes_written);
-	return bytes_written;
-}
-
-static struct bsg_device *bsg_alloc_device(void)
-{
-	struct bsg_device *bd;
-
-	bd = kzalloc(sizeof(struct bsg_device), GFP_KERNEL);
-	if (unlikely(!bd))
-		return NULL;
-
-	spin_lock_init(&bd->lock);
-
-	bd->max_queue = BSG_DEFAULT_CMDS;
-
-	INIT_LIST_HEAD(&bd->busy_list);
-	INIT_LIST_HEAD(&bd->done_list);
-	INIT_HLIST_NODE(&bd->dev_list);
-
-	init_waitqueue_head(&bd->wq_free);
-	init_waitqueue_head(&bd->wq_done);
-	return bd;
-}
-
-static void bsg_kref_release_function(struct kref *kref)
-{
-	struct bsg_class_device *bcd =
-		container_of(kref, struct bsg_class_device, ref);
-	struct device *parent = bcd->parent;
-
-	if (bcd->release)
-		bcd->release(bcd->parent);
-
-	put_device(parent);
-}
-
-static int bsg_put_device(struct bsg_device *bd)
-{
-	int ret = 0, do_free;
-	struct request_queue *q = bd->queue;
-
-	mutex_lock(&bsg_mutex);
-
-	do_free = atomic_dec_and_test(&bd->ref_count);
-	if (!do_free) {
-		mutex_unlock(&bsg_mutex);
-		goto out;
-	}
-
-	hlist_del(&bd->dev_list);
-	mutex_unlock(&bsg_mutex);
-
-	dprintk("%s: tearing down\n", bd->name);
-
-	/*
-	 * close can always block
-	 */
-	set_bit(BSG_F_BLOCK, &bd->flags);
-
-	/*
-	 * correct error detection baddies here again. it's the responsibility
-	 * of the app to properly reap commands before close() if it wants
-	 * fool-proof error detection
-	 */
-	ret = bsg_complete_all_commands(bd);
-
-	kfree(bd);
-out:
-	kref_put(&q->bsg_dev.ref, bsg_kref_release_function);
-	if (do_free)
-		blk_put_queue(q);
-	return ret;
-}
-
-static struct bsg_device *bsg_add_device(struct inode *inode,
-					 struct request_queue *rq,
-					 struct file *file)
-{
-	struct bsg_device *bd;
-#ifdef BSG_DEBUG
-	unsigned char buf[32];
-#endif
-	if (!blk_get_queue(rq))
-		return ERR_PTR(-ENXIO);
-
-	bd = bsg_alloc_device();
-	if (!bd) {
-		blk_put_queue(rq);
-		return ERR_PTR(-ENOMEM);
-	}
-
-	bd->queue = rq;
-
-	bsg_set_block(bd, file);
-
-	atomic_set(&bd->ref_count, 1);
-	mutex_lock(&bsg_mutex);
-	hlist_add_head(&bd->dev_list, bsg_dev_idx_hash(iminor(inode)));
-
-	strncpy(bd->name, dev_name(rq->bsg_dev.class_dev), sizeof(bd->name) - 1);
-	dprintk("bound to <%s>, max queue %d\n",
-		format_dev_t(buf, inode->i_rdev), bd->max_queue);
-
-	mutex_unlock(&bsg_mutex);
-	return bd;
-}
-
-static struct bsg_device *__bsg_get_device(int minor, struct request_queue *q)
-{
-	struct bsg_device *bd;
-	struct hlist_node *entry;
-
-	mutex_lock(&bsg_mutex);
-
-	hlist_for_each_entry(bd, entry, bsg_dev_idx_hash(minor), dev_list) {
-		if (bd->queue == q) {
-			atomic_inc(&bd->ref_count);
-			goto found;
-		}
-	}
-	bd = NULL;
-found:
-	mutex_unlock(&bsg_mutex);
-	return bd;
-}
-
-static struct bsg_device *bsg_get_device(struct inode *inode, struct file *file)
-{
-	struct bsg_device *bd;
-	struct bsg_class_device *bcd;
-
-	/*
-	 * find the class device
-	 */
-	mutex_lock(&bsg_mutex);
-	bcd = idr_find(&bsg_minor_idr, iminor(inode));
-	if (bcd)
-		kref_get(&bcd->ref);
-	mutex_unlock(&bsg_mutex);
-
-	if (!bcd)
-		return ERR_PTR(-ENODEV);
-
-	bd = __bsg_get_device(iminor(inode), bcd->queue);
-	if (bd)
-		return bd;
-
-	bd = bsg_add_device(inode, bcd->queue, file);
-	if (IS_ERR(bd))
-		kref_put(&bcd->ref, bsg_kref_release_function);
-
-	return bd;
-}
-
-static int bsg_open(struct inode *inode, struct file *file)
-{
-	struct bsg_device *bd;
-
-	bd = bsg_get_device(inode, file);
-
-	if (IS_ERR(bd))
-		return PTR_ERR(bd);
-
-	file->private_data = bd;
-	return 0;
-}
-
-static int bsg_release(struct inode *inode, struct file *file)
-{
-	struct bsg_device *bd = file->private_data;
-
-	file->private_data = NULL;
-	return bsg_put_device(bd);
-}
-
-static unsigned int bsg_poll(struct file *file, poll_table *wait)
-{
-	struct bsg_device *bd = file->private_data;
-	unsigned int mask = 0;
-
-	poll_wait(file, &bd->wq_done, wait);
-	poll_wait(file, &bd->wq_free, wait);
-
-	spin_lock_irq(&bd->lock);
-	if (!list_empty(&bd->done_list))
-		mask |= POLLIN | POLLRDNORM;
-	if (bd->queued_cmds < bd->max_queue)
-		mask |= POLLOUT;
-	spin_unlock_irq(&bd->lock);
-
-	return mask;
-}
-
-static long bsg_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
-{
-	struct bsg_device *bd = file->private_data;
-	int __user *uarg = (int __user *) arg;
-	int ret;
-
-	switch (cmd) {
-		/*
-		 * our own ioctls
-		 */
-	case SG_GET_COMMAND_Q:
-		return put_user(bd->max_queue, uarg);
-	case SG_SET_COMMAND_Q: {
-		int queue;
-
-		if (get_user(queue, uarg))
-			return -EFAULT;
-		if (queue < 1)
-			return -EINVAL;
-
-		spin_lock_irq(&bd->lock);
-		bd->max_queue = queue;
-		spin_unlock_irq(&bd->lock);
-		return 0;
-	}
-
-	/*
-	 * SCSI/sg ioctls
-	 */
-	case SG_GET_VERSION_NUM:
-	case SCSI_IOCTL_GET_IDLUN:
-	case SCSI_IOCTL_GET_BUS_NUMBER:
-	case SG_SET_TIMEOUT:
-	case SG_GET_TIMEOUT:
-	case SG_GET_RESERVED_SIZE:
-	case SG_SET_RESERVED_SIZE:
-	case SG_EMULATED_HOST:
-	case SCSI_IOCTL_SEND_COMMAND: {
-		void __user *uarg = (void __user *) arg;
-		return scsi_cmd_ioctl(bd->queue, NULL, file->f_mode, cmd, uarg);
-	}
-	case SG_IO: {
-		struct request *rq;
-		struct bio *bio, *bidi_bio = NULL;
-		struct sg_io_v4 hdr;
-		int at_head;
-		u8 sense[SCSI_SENSE_BUFFERSIZE];
-
-		if (copy_from_user(&hdr, uarg, sizeof(hdr)))
-			return -EFAULT;
-
-		rq = bsg_map_hdr(bd, &hdr, file->f_mode & FMODE_WRITE, sense);
-		if (IS_ERR(rq))
-			return PTR_ERR(rq);
-
-		bio = rq->bio;
-		if (rq->next_rq)
-			bidi_bio = rq->next_rq->bio;
-
-		at_head = (0 == (hdr.flags & BSG_FLAG_Q_AT_TAIL));
-		blk_execute_rq(bd->queue, NULL, rq, at_head);
-		ret = blk_complete_sgv4_hdr_rq(rq, &hdr, bio, bidi_bio);
-
-		if (copy_to_user(uarg, &hdr, sizeof(hdr)))
-			return -EFAULT;
-
-		return ret;
-	}
-	/*
-	 * block device ioctls
-	 */
-	default:
-#if 0
-		return ioctl_by_bdev(bd->bdev, cmd, arg);
-#else
-		return -ENOTTY;
-#endif
-	}
-}
-
-static const struct file_operations bsg_fops = {
-	.read		=	bsg_read,
-	.write		=	bsg_write,
-	.poll		=	bsg_poll,
-	.open		=	bsg_open,
-	.release	=	bsg_release,
-	.unlocked_ioctl	=	bsg_ioctl,
-	.owner		=	THIS_MODULE,
-	.llseek		=	default_llseek,
-};
-
-void bsg_unregister_queue(struct request_queue *q)
-{
-	struct bsg_class_device *bcd = &q->bsg_dev;
-
-	if (!bcd->class_dev)
-		return;
-
-	mutex_lock(&bsg_mutex);
-	idr_remove(&bsg_minor_idr, bcd->minor);
-	if (q->kobj.sd)
-		sysfs_remove_link(&q->kobj, "bsg");
-	device_unregister(bcd->class_dev);
-	bcd->class_dev = NULL;
-	kref_put(&bcd->ref, bsg_kref_release_function);
-	mutex_unlock(&bsg_mutex);
-}
-EXPORT_SYMBOL_GPL(bsg_unregister_queue);
-
-int bsg_register_queue(struct request_queue *q, struct device *parent,
-		       const char *name, void (*release)(struct device *))
-{
-	struct bsg_class_device *bcd;
-	dev_t dev;
-	int ret, minor;
-	struct device *class_dev = NULL;
-	const char *devname;
-
-	if (name)
-		devname = name;
-	else
-		devname = dev_name(parent);
-
-	/*
-	 * we need a proper transport to send commands, not a stacked device
-	 */
-	if (!q->request_fn)
-		return 0;
-
-	bcd = &q->bsg_dev;
-	memset(bcd, 0, sizeof(*bcd));
-
-	mutex_lock(&bsg_mutex);
-
-	ret = idr_pre_get(&bsg_minor_idr, GFP_KERNEL);
-	if (!ret) {
-		ret = -ENOMEM;
-		goto unlock;
-	}
-
-	ret = idr_get_new(&bsg_minor_idr, bcd, &minor);
-	if (ret < 0)
-		goto unlock;
-
-	if (minor >= BSG_MAX_DEVS) {
-		printk(KERN_ERR "bsg: too many bsg devices\n");
-		ret = -EINVAL;
-		goto remove_idr;
-	}
-
-	bcd->minor = minor;
-	bcd->queue = q;
-	bcd->parent = get_device(parent);
-	bcd->release = release;
-	kref_init(&bcd->ref);
-	dev = MKDEV(bsg_major, bcd->minor);
-	class_dev = device_create(bsg_class, parent, dev, NULL, "%s", devname);
-	if (IS_ERR(class_dev)) {
-		ret = PTR_ERR(class_dev);
-		goto put_dev;
-	}
-	bcd->class_dev = class_dev;
-
-	if (q->kobj.sd) {
-		ret = sysfs_create_link(&q->kobj, &bcd->class_dev->kobj, "bsg");
-		if (ret)
-			goto unregister_class_dev;
-	}
-
-	mutex_unlock(&bsg_mutex);
-	return 0;
-
-unregister_class_dev:
-	device_unregister(class_dev);
-put_dev:
-	put_device(parent);
-remove_idr:
-	idr_remove(&bsg_minor_idr, minor);
-unlock:
-	mutex_unlock(&bsg_mutex);
-	return ret;
-}
-EXPORT_SYMBOL_GPL(bsg_register_queue);
-
-static struct cdev bsg_cdev;
-
-static char *bsg_devnode(struct device *dev, umode_t *mode)
-{
-	return kasprintf(GFP_KERNEL, "bsg/%s", dev_name(dev));
-}
-
-static int __init bsg_init(void)
-{
-	int ret, i;
-	dev_t devid;
-
-	bsg_cmd_cachep = kmem_cache_create("bsg_cmd",
-				sizeof(struct bsg_command), 0, 0, NULL);
-	if (!bsg_cmd_cachep) {
-		printk(KERN_ERR "bsg: failed creating slab cache\n");
-		return -ENOMEM;
-	}
-
-	for (i = 0; i < BSG_LIST_ARRAY_SIZE; i++)
-		INIT_HLIST_HEAD(&bsg_device_list[i]);
-
-	bsg_class = class_create(THIS_MODULE, "bsg");
-	if (IS_ERR(bsg_class)) {
-		ret = PTR_ERR(bsg_class);
-		goto destroy_kmemcache;
-	}
-	bsg_class->devnode = bsg_devnode;
-
-	ret = alloc_chrdev_region(&devid, 0, BSG_MAX_DEVS, "bsg");
-	if (ret)
-		goto destroy_bsg_class;
-
-	bsg_major = MAJOR(devid);
-
-	cdev_init(&bsg_cdev, &bsg_fops);
-	ret = cdev_add(&bsg_cdev, MKDEV(bsg_major, 0), BSG_MAX_DEVS);
-	if (ret)
-		goto unregister_chrdev;
-
-	printk(KERN_INFO BSG_DESCRIPTION " version " BSG_VERSION
-	       " loaded (major %d)\n", bsg_major);
-	return 0;
-unregister_chrdev:
-	unregister_chrdev_region(MKDEV(bsg_major, 0), BSG_MAX_DEVS);
-destroy_bsg_class:
-	class_destroy(bsg_class);
-destroy_kmemcache:
-	kmem_cache_destroy(bsg_cmd_cachep);
-	return ret;
-}
-
-MODULE_AUTHOR("Jens Axboe");
-MODULE_DESCRIPTION(BSG_DESCRIPTION);
-MODULE_LICENSE("GPL");
-
-device_initcall(bsg_init);