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fix mismerge in ll_rw_blk.c

This commit is contained in:
James Bottomley 2005-08-28 10:43:07 -05:00
parent 3d52acb342 73747aed04
commit 31151ba2ce
7 changed files with 400 additions and 104 deletions
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192
drivers/block/ll_rw_blk.c
View File

@ -284,6 +284,7 @@ static inline void rq_init(request_queue_t *q, struct request *rq)
rq->special = NULL;
rq->data_len = 0;
rq->data = NULL;
rq->nr_phys_segments = 0;
rq->sense = NULL;
rq->end_io = NULL;
rq->end_io_data = NULL;
@ -2115,7 +2116,7 @@ EXPORT_SYMBOL(blk_insert_request);
/**
* blk_rq_map_user - map user data to a request, for REQ_BLOCK_PC usage
* @q: request queue where request should be inserted
* @rw: READ or WRITE data
* @rq: request structure to fill
* @ubuf: the user buffer
* @len: length of user data
*
@ -2132,21 +2133,19 @@ EXPORT_SYMBOL(blk_insert_request);
* original bio must be passed back in to blk_rq_unmap_user() for proper
* unmapping.
*/
struct request *blk_rq_map_user(request_queue_t *q, int rw, void __user *ubuf,
unsigned int len)
int blk_rq_map_user(request_queue_t *q, struct request *rq, void __user *ubuf,
unsigned int len)
{
unsigned long uaddr;
struct request *rq;
struct bio *bio;
int reading;
if (len > (q->max_sectors << 9))
return ERR_PTR(-EINVAL);
if ((!len && ubuf) || (len && !ubuf))
return ERR_PTR(-EINVAL);
return -EINVAL;
if (!len || !ubuf)
return -EINVAL;
rq = blk_get_request(q, rw, __GFP_WAIT);
if (!rq)
return ERR_PTR(-ENOMEM);
reading = rq_data_dir(rq) == READ;
/*
* if alignment requirement is satisfied, map in user pages for
@ -2154,9 +2153,9 @@ struct request *blk_rq_map_user(request_queue_t *q, int rw, void __user *ubuf,
*/
uaddr = (unsigned long) ubuf;
if (!(uaddr & queue_dma_alignment(q)) && !(len & queue_dma_alignment(q)))
bio = bio_map_user(q, NULL, uaddr, len, rw == READ);
bio = bio_map_user(q, NULL, uaddr, len, reading);
else
bio = bio_copy_user(q, uaddr, len, rw == READ);
bio = bio_copy_user(q, uaddr, len, reading);
if (!IS_ERR(bio)) {
rq->bio = rq->biotail = bio;
@ -2164,28 +2163,70 @@ struct request *blk_rq_map_user(request_queue_t *q, int rw, void __user *ubuf,
rq->buffer = rq->data = NULL;
rq->data_len = len;
return rq;
return 0;
}
/*
* bio is the err-ptr
*/
blk_put_request(rq);
return (struct request *) bio;
return PTR_ERR(bio);
}
EXPORT_SYMBOL(blk_rq_map_user);
/**
* blk_rq_map_user_iov - map user data to a request, for REQ_BLOCK_PC usage
* @q: request queue where request should be inserted
* @rq: request to map data to
* @iov: pointer to the iovec
* @iov_count: number of elements in the iovec
*
* Description:
* Data will be mapped directly for zero copy io, if possible. Otherwise
* a kernel bounce buffer is used.
*
* A matching blk_rq_unmap_user() must be issued at the end of io, while
* still in process context.
*
* Note: The mapped bio may need to be bounced through blk_queue_bounce()
* before being submitted to the device, as pages mapped may be out of
* reach. It's the callers responsibility to make sure this happens. The
* original bio must be passed back in to blk_rq_unmap_user() for proper
* unmapping.
*/
int blk_rq_map_user_iov(request_queue_t *q, struct request *rq,
struct sg_iovec *iov, int iov_count)
{
struct bio *bio;
if (!iov || iov_count <= 0)
return -EINVAL;
/* we don't allow misaligned data like bio_map_user() does. If the
* user is using sg, they're expected to know the alignment constraints
* and respect them accordingly */
bio = bio_map_user_iov(q, NULL, iov, iov_count, rq_data_dir(rq)== READ);
if (IS_ERR(bio))
return PTR_ERR(bio);
rq->bio = rq->biotail = bio;
blk_rq_bio_prep(q, rq, bio);
rq->buffer = rq->data = NULL;
rq->data_len = bio->bi_size;
return 0;
}
EXPORT_SYMBOL(blk_rq_map_user_iov);
/**
* blk_rq_unmap_user - unmap a request with user data
* @rq: request to be unmapped
* @bio: bio for the request
* @bio: bio to be unmapped
* @ulen: length of user buffer
*
* Description:
* Unmap a request previously mapped by blk_rq_map_user().
* Unmap a bio previously mapped by blk_rq_map_user().
*/
int blk_rq_unmap_user(struct request *rq, struct bio *bio, unsigned int ulen)
int blk_rq_unmap_user(struct bio *bio, unsigned int ulen)
{
int ret = 0;
@ -2196,31 +2237,89 @@ int blk_rq_unmap_user(struct request *rq, struct bio *bio, unsigned int ulen)
ret = bio_uncopy_user(bio);
}
blk_put_request(rq);
return ret;
return 0;
}
EXPORT_SYMBOL(blk_rq_unmap_user);
/**
* blk_rq_map_kern - map kernel data to a request, for REQ_BLOCK_PC usage
* @q: request queue where request should be inserted
* @rq: request to fill
* @kbuf: the kernel buffer
* @len: length of user data
* @gfp_mask: memory allocation flags
*/
int blk_rq_map_kern(request_queue_t *q, struct request *rq, void *kbuf,
unsigned int len, unsigned int gfp_mask)
{
struct bio *bio;
if (len > (q->max_sectors << 9))
return -EINVAL;
if (!len || !kbuf)
return -EINVAL;
bio = bio_map_kern(q, kbuf, len, gfp_mask);
if (IS_ERR(bio))
return PTR_ERR(bio);
if (rq_data_dir(rq) == WRITE)
bio->bi_rw |= (1 << BIO_RW);
rq->bio = rq->biotail = bio;
blk_rq_bio_prep(q, rq, bio);
rq->buffer = rq->data = NULL;
rq->data_len = len;
return 0;
}
EXPORT_SYMBOL(blk_rq_map_kern);
/**
* blk_execute_rq_nowait - insert a request into queue for execution
* @q: queue to insert the request in
* @bd_disk: matching gendisk
* @rq: request to insert
* @at_head: insert request at head or tail of queue
* @done: I/O completion handler
*
* Description:
* Insert a fully prepared request at the back of the io scheduler queue
* for execution. Don't wait for completion.
*/
void blk_execute_rq_nowait(request_queue_t *q, struct gendisk *bd_disk,
struct request *rq, int at_head,
void (*done)(struct request *))
{
int where = at_head ? ELEVATOR_INSERT_FRONT : ELEVATOR_INSERT_BACK;
rq->rq_disk = bd_disk;
rq->flags |= REQ_NOMERGE;
rq->end_io = done;
elv_add_request(q, rq, where, 1);
generic_unplug_device(q);
}
/**
* blk_execute_rq - insert a request into queue for execution
* @q: queue to insert the request in
* @bd_disk: matching gendisk
* @rq: request to insert
* @at_head: insert request at head or tail of queue
*
* Description:
* Insert a fully prepared request at the back of the io scheduler queue
* for execution.
* for execution and wait for completion.
*/
int blk_execute_rq(request_queue_t *q, struct gendisk *bd_disk,
struct request *rq)
struct request *rq, int at_head)
{
DECLARE_COMPLETION(wait);
char sense[SCSI_SENSE_BUFFERSIZE];
int err = 0;
rq->rq_disk = bd_disk;
/*
* we need an extra reference to the request, so we can look at
* it after io completion
@ -2233,11 +2332,8 @@ int blk_execute_rq(request_queue_t *q, struct gendisk *bd_disk,
rq->sense_len = 0;
}
rq->flags |= REQ_NOMERGE;
rq->waiting = &wait;
rq->end_io = blk_end_sync_rq;
elv_add_request(q, rq, ELEVATOR_INSERT_BACK, 1);
generic_unplug_device(q);
blk_execute_rq_nowait(q, bd_disk, rq, at_head, blk_end_sync_rq);
wait_for_completion(&wait);
rq->waiting = NULL;
@ -2277,6 +2373,44 @@ int blkdev_issue_flush(struct block_device *bdev, sector_t *error_sector)
EXPORT_SYMBOL(blkdev_issue_flush);
/**
* blkdev_scsi_issue_flush_fn - issue flush for SCSI devices
* @q: device queue
* @disk: gendisk
* @error_sector: error offset
*
* Description:
* Devices understanding the SCSI command set, can use this function as
* a helper for issuing a cache flush. Note: driver is required to store
* the error offset (in case of error flushing) in ->sector of struct
* request.
*/
int blkdev_scsi_issue_flush_fn(request_queue_t *q, struct gendisk *disk,
sector_t *error_sector)
{
struct request *rq = blk_get_request(q, WRITE, __GFP_WAIT);
int ret;
rq->flags |= REQ_BLOCK_PC | REQ_SOFTBARRIER;
rq->sector = 0;
memset(rq->cmd, 0, sizeof(rq->cmd));
rq->cmd[0] = 0x35;
rq->cmd_len = 12;
rq->data = NULL;
rq->data_len = 0;
rq->timeout = 60 * HZ;
ret = blk_execute_rq(q, disk, rq, 0);
if (ret && error_sector)
*error_sector = rq->sector;
blk_put_request(rq);
return ret;
}
EXPORT_SYMBOL(blkdev_scsi_issue_flush_fn);
static void drive_stat_acct(struct request *rq, int nr_sectors, int new_io)
{
int rw = rq_data_dir(rq);

60
drivers/block/scsi_ioctl.c
View File

@ -216,7 +216,7 @@ static int sg_io(struct file *file, request_queue_t *q,
struct gendisk *bd_disk, struct sg_io_hdr *hdr)
{
unsigned long start_time;
int reading, writing;
int writing = 0, ret = 0;
struct request *rq;
struct bio *bio;
char sense[SCSI_SENSE_BUFFERSIZE];
@ -231,38 +231,48 @@ static int sg_io(struct file *file, request_queue_t *q,
if (verify_command(file, cmd))
return -EPERM;
/*
* we'll do that later
*/
if (hdr->iovec_count)
return -EOPNOTSUPP;
if (hdr->dxfer_len > (q->max_sectors << 9))
return -EIO;
reading = writing = 0;
if (hdr->dxfer_len) {
if (hdr->dxfer_len)
switch (hdr->dxfer_direction) {
default:
return -EINVAL;
case SG_DXFER_TO_FROM_DEV:
reading = 1;
/* fall through */
case SG_DXFER_TO_DEV:
writing = 1;
break;
case SG_DXFER_FROM_DEV:
reading = 1;
break;
}
rq = blk_rq_map_user(q, writing ? WRITE : READ, hdr->dxferp,
hdr->dxfer_len);
rq = blk_get_request(q, writing ? WRITE : READ, GFP_KERNEL);
if (!rq)
return -ENOMEM;
if (IS_ERR(rq))
return PTR_ERR(rq);
} else
rq = blk_get_request(q, READ, __GFP_WAIT);
if (hdr->iovec_count) {
const int size = sizeof(struct sg_iovec) * hdr->iovec_count;
struct sg_iovec *iov;
iov = kmalloc(size, GFP_KERNEL);
if (!iov) {
ret = -ENOMEM;
goto out;
}
if (copy_from_user(iov, hdr->dxferp, size)) {
kfree(iov);
ret = -EFAULT;
goto out;
}
ret = blk_rq_map_user_iov(q, rq, iov, hdr->iovec_count);
kfree(iov);
} else if (hdr->dxfer_len)
ret = blk_rq_map_user(q, rq, hdr->dxferp, hdr->dxfer_len);
if (ret)
goto out;
/*
* fill in request structure
@ -298,7 +308,7 @@ static int sg_io(struct file *file, request_queue_t *q,
* (if he doesn't check that is his problem).
* N.B. a non-zero SCSI status is _not_ necessarily an error.
*/
blk_execute_rq(q, bd_disk, rq);
blk_execute_rq(q, bd_disk, rq, 0);
/* write to all output members */
hdr->status = 0xff & rq->errors;
@ -320,12 +330,14 @@ static int sg_io(struct file *file, request_queue_t *q,
hdr->sb_len_wr = len;
}
if (blk_rq_unmap_user(rq, bio, hdr->dxfer_len))
return -EFAULT;
if (blk_rq_unmap_user(bio, hdr->dxfer_len))
ret = -EFAULT;
/* may not have succeeded, but output values written to control
* structure (struct sg_io_hdr). */
return 0;
out:
blk_put_request(rq);
return ret;
}
#define OMAX_SB_LEN 16 /* For backward compatibility */
@ -408,7 +420,7 @@ static int sg_scsi_ioctl(struct file *file, request_queue_t *q,
rq->data_len = bytes;
rq->flags |= REQ_BLOCK_PC;
blk_execute_rq(q, bd_disk, rq);
blk_execute_rq(q, bd_disk, rq, 0);
err = rq->errors & 0xff; /* only 8 bit SCSI status */
if (err) {
if (rq->sense_len && rq->sense) {
@ -561,7 +573,7 @@ int scsi_cmd_ioctl(struct file *file, struct gendisk *bd_disk, unsigned int cmd,
rq->cmd[0] = GPCMD_START_STOP_UNIT;
rq->cmd[4] = 0x02 + (close != 0);
rq->cmd_len = 6;
err = blk_execute_rq(q, bd_disk, rq);
err = blk_execute_rq(q, bd_disk, rq, 0);
blk_put_request(rq);
break;
default:

15
drivers/cdrom/cdrom.c
View File

@ -2097,6 +2097,10 @@ static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf,
if (!q)
return -ENXIO;
rq = blk_get_request(q, READ, GFP_KERNEL);
if (!rq)
return -ENOMEM;
cdi->last_sense = 0;
while (nframes) {
@ -2108,9 +2112,9 @@ static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf,
len = nr * CD_FRAMESIZE_RAW;
rq = blk_rq_map_user(q, READ, ubuf, len);
if (IS_ERR(rq))
return PTR_ERR(rq);
ret = blk_rq_map_user(q, rq, ubuf, len);
if (ret)
break;
memset(rq->cmd, 0, sizeof(rq->cmd));
rq->cmd[0] = GPCMD_READ_CD;
@ -2132,13 +2136,13 @@ static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf,
if (rq->bio)
blk_queue_bounce(q, &rq->bio);
if (blk_execute_rq(q, cdi->disk, rq)) {
if (blk_execute_rq(q, cdi->disk, rq, 0)) {
struct request_sense *s = rq->sense;
ret = -EIO;
cdi->last_sense = s->sense_key;
}
if (blk_rq_unmap_user(rq, bio, len))
if (blk_rq_unmap_user(bio, len))
ret = -EFAULT;
if (ret)
@ -2149,6 +2153,7 @@ static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf,
ubuf += len;
}
blk_put_request(rq);
return ret;
}

2
drivers/ide/ide-disk.c
View File

@ -754,7 +754,7 @@ static int idedisk_issue_flush(request_queue_t *q, struct gendisk *disk,
idedisk_prepare_flush(q, rq);
ret = blk_execute_rq(q, disk, rq);
ret = blk_execute_rq(q, disk, rq, 0);
/*
* if we failed and caller wants error offset, get it

219
fs/bio.c
View File

@ -25,6 +25,7 @@
#include <linux/module.h>
#include <linux/mempool.h>
#include <linux/workqueue.h>
#include <scsi/sg.h> /* for struct sg_iovec */
#define BIO_POOL_SIZE 256
@ -546,22 +547,34 @@ out_bmd:
return ERR_PTR(ret);
}
static struct bio *__bio_map_user(request_queue_t *q, struct block_device *bdev,
unsigned long uaddr, unsigned int len,
int write_to_vm)
static struct bio *__bio_map_user_iov(request_queue_t *q,
struct block_device *bdev,
struct sg_iovec *iov, int iov_count,
int write_to_vm)
{
unsigned long end = (uaddr + len + PAGE_SIZE - 1) >> PAGE_SHIFT;
unsigned long start = uaddr >> PAGE_SHIFT;
const int nr_pages = end - start;
int ret, offset, i;
int i, j;
int nr_pages = 0;
struct page **pages;
struct bio *bio;
int cur_page = 0;
int ret, offset;
/*
* transfer and buffer must be aligned to at least hardsector
* size for now, in the future we can relax this restriction
*/
if ((uaddr & queue_dma_alignment(q)) || (len & queue_dma_alignment(q)))
for (i = 0; i < iov_count; i++) {
unsigned long uaddr = (unsigned long)iov[i].iov_base;
unsigned long len = iov[i].iov_len;
unsigned long end = (uaddr + len + PAGE_SIZE - 1) >> PAGE_SHIFT;
unsigned long start = uaddr >> PAGE_SHIFT;
nr_pages += end - start;
/*
* transfer and buffer must be aligned to at least hardsector
* size for now, in the future we can relax this restriction
*/
if ((uaddr & queue_dma_alignment(q)) || (len & queue_dma_alignment(q)))
return ERR_PTR(-EINVAL);
}
if (!nr_pages)
return ERR_PTR(-EINVAL);
bio = bio_alloc(GFP_KERNEL, nr_pages);
@ -573,42 +586,54 @@ static struct bio *__bio_map_user(request_queue_t *q, struct block_device *bdev,
if (!pages)
goto out;
down_read(&current->mm->mmap_sem);
ret = get_user_pages(current, current->mm, uaddr, nr_pages,
write_to_vm, 0, pages, NULL);
up_read(&current->mm->mmap_sem);
memset(pages, 0, nr_pages * sizeof(struct page *));
if (ret < nr_pages)
goto out;
for (i = 0; i < iov_count; i++) {
unsigned long uaddr = (unsigned long)iov[i].iov_base;
unsigned long len = iov[i].iov_len;
unsigned long end = (uaddr + len + PAGE_SIZE - 1) >> PAGE_SHIFT;
unsigned long start = uaddr >> PAGE_SHIFT;
const int local_nr_pages = end - start;
const int page_limit = cur_page + local_nr_pages;
down_read(&current->mm->mmap_sem);
ret = get_user_pages(current, current->mm, uaddr,
local_nr_pages,
write_to_vm, 0, &pages[cur_page], NULL);
up_read(&current->mm->mmap_sem);
bio->bi_bdev = bdev;
if (ret < local_nr_pages)
goto out_unmap;
offset = uaddr & ~PAGE_MASK;
for (i = 0; i < nr_pages; i++) {
unsigned int bytes = PAGE_SIZE - offset;
if (len <= 0)
break;
offset = uaddr & ~PAGE_MASK;
for (j = cur_page; j < page_limit; j++) {
unsigned int bytes = PAGE_SIZE - offset;
if (bytes > len)
bytes = len;
if (len <= 0)
break;
if (bytes > len)
bytes = len;
/*
* sorry...
*/
if (__bio_add_page(q, bio, pages[j], bytes, offset) < bytes)
break;
len -= bytes;
offset = 0;
}
cur_page = j;
/*
* sorry...
* release the pages we didn't map into the bio, if any
*/
if (__bio_add_page(q, bio, pages[i], bytes, offset) < bytes)
break;
len -= bytes;
offset = 0;
while (j < page_limit)
page_cache_release(pages[j++]);
}
/*
* release the pages we didn't map into the bio, if any
*/
while (i < nr_pages)
page_cache_release(pages[i++]);
kfree(pages);
/*
@ -617,9 +642,17 @@ static struct bio *__bio_map_user(request_queue_t *q, struct block_device *bdev,
if (!write_to_vm)
bio->bi_rw |= (1 << BIO_RW);
bio->bi_bdev = bdev;
bio->bi_flags |= (1 << BIO_USER_MAPPED);
return bio;
out:
out_unmap:
for (i = 0; i < nr_pages; i++) {
if(!pages[i])
break;
page_cache_release(pages[i]);
}
out:
kfree(pages);
bio_put(bio);
return ERR_PTR(ret);
@ -639,9 +672,33 @@ out:
struct bio *bio_map_user(request_queue_t *q, struct block_device *bdev,
unsigned long uaddr, unsigned int len, int write_to_vm)
{
struct bio *bio;
struct sg_iovec iov;
bio = __bio_map_user(q, bdev, uaddr, len, write_to_vm);
iov.iov_base = (__user void *)uaddr;
iov.iov_len = len;
return bio_map_user_iov(q, bdev, &iov, 1, write_to_vm);
}
/**
* bio_map_user_iov - map user sg_iovec table into bio
* @q: the request_queue_t for the bio
* @bdev: destination block device
* @iov: the iovec.
* @iov_count: number of elements in the iovec
* @write_to_vm: bool indicating writing to pages or not
*
* Map the user space address into a bio suitable for io to a block
* device. Returns an error pointer in case of error.
*/
struct bio *bio_map_user_iov(request_queue_t *q, struct block_device *bdev,
struct sg_iovec *iov, int iov_count,
int write_to_vm)
{
struct bio *bio;
int len = 0, i;
bio = __bio_map_user_iov(q, bdev, iov, iov_count, write_to_vm);
if (IS_ERR(bio))
return bio;
@ -654,6 +711,9 @@ struct bio *bio_map_user(request_queue_t *q, struct block_device *bdev,
*/
bio_get(bio);
for (i = 0; i < iov_count; i++)
len += iov[i].iov_len;
if (bio->bi_size == len)
return bio;
@ -698,6 +758,82 @@ void bio_unmap_user(struct bio *bio)
bio_put(bio);
}
static int bio_map_kern_endio(struct bio *bio, unsigned int bytes_done, int err)
{
if (bio->bi_size)
return 1;
bio_put(bio);
return 0;
}
static struct bio *__bio_map_kern(request_queue_t *q, void *data,
unsigned int len, unsigned int gfp_mask)
{
unsigned long kaddr = (unsigned long)data;
unsigned long end = (kaddr + len + PAGE_SIZE - 1) >> PAGE_SHIFT;
unsigned long start = kaddr >> PAGE_SHIFT;
const int nr_pages = end - start;
int offset, i;
struct bio *bio;
bio = bio_alloc(gfp_mask, nr_pages);
if (!bio)
return ERR_PTR(-ENOMEM);
offset = offset_in_page(kaddr);
for (i = 0; i < nr_pages; i++) {
unsigned int bytes = PAGE_SIZE - offset;
if (len <= 0)
break;
if (bytes > len)
bytes = len;
if (__bio_add_page(q, bio, virt_to_page(data), bytes,
offset) < bytes)
break;
data += bytes;
len -= bytes;
offset = 0;
}
bio->bi_end_io = bio_map_kern_endio;
return bio;
}
/**
* bio_map_kern - map kernel address into bio
* @q: the request_queue_t for the bio
* @data: pointer to buffer to map
* @len: length in bytes
* @gfp_mask: allocation flags for bio allocation
*
* Map the kernel address into a bio suitable for io to a block
* device. Returns an error pointer in case of error.
*/
struct bio *bio_map_kern(request_queue_t *q, void *data, unsigned int len,
unsigned int gfp_mask)
{
struct bio *bio;
bio = __bio_map_kern(q, data, len, gfp_mask);
if (IS_ERR(bio))
return bio;
if (bio->bi_size == len)
return bio;
/*
* Don't support partial mappings.
*/
bio_put(bio);
return ERR_PTR(-EINVAL);
}
/*
* bio_set_pages_dirty() and bio_check_pages_dirty() are support functions
* for performing direct-IO in BIOs.
@ -1085,6 +1221,7 @@ EXPORT_SYMBOL(bio_add_page);
EXPORT_SYMBOL(bio_get_nr_vecs);
EXPORT_SYMBOL(bio_map_user);
EXPORT_SYMBOL(bio_unmap_user);
EXPORT_SYMBOL(bio_map_kern);
EXPORT_SYMBOL(bio_pair_release);
EXPORT_SYMBOL(bio_split);
EXPORT_SYMBOL(bio_split_pool);

6
include/linux/bio.h
View File

@ -295,7 +295,13 @@ extern int bio_add_page(struct bio *, struct page *, unsigned int,unsigned int);
extern int bio_get_nr_vecs(struct block_device *);
extern struct bio *bio_map_user(struct request_queue *, struct block_device *,
unsigned long, unsigned int, int);
struct sg_iovec;
extern struct bio *bio_map_user_iov(struct request_queue *,
struct block_device *,
struct sg_iovec *, int, int);
extern void bio_unmap_user(struct bio *);
extern struct bio *bio_map_kern(struct request_queue *, void *, unsigned int,
unsigned int);
extern void bio_set_pages_dirty(struct bio *bio);
extern void bio_check_pages_dirty(struct bio *bio);
extern struct bio *bio_copy_user(struct request_queue *, unsigned long, unsigned int, int);

10
include/linux/blkdev.h
View File

@ -563,10 +563,12 @@ extern void blk_sync_queue(struct request_queue *q);
extern void __blk_stop_queue(request_queue_t *q);
extern void blk_run_queue(request_queue_t *);
extern void blk_queue_activity_fn(request_queue_t *, activity_fn *, void *);
extern struct request *blk_rq_map_user(request_queue_t *, int, void __user *, unsigned int);
extern int blk_rq_unmap_user(struct request *, struct bio *, unsigned int);
extern int blk_execute_rq(request_queue_t *, struct gendisk *, struct request *);
extern int blk_rq_map_user(request_queue_t *, struct request *, void __user *, unsigned int);
extern int blk_rq_unmap_user(struct bio *, unsigned int);
extern int blk_rq_map_kern(request_queue_t *, struct request *, void *, unsigned int, unsigned int);
extern int blk_rq_map_user_iov(request_queue_t *, struct request *, struct sg_iovec *, int);
extern int blk_execute_rq(request_queue_t *, struct gendisk *,
struct request *, int);
static inline request_queue_t *bdev_get_queue(struct block_device *bdev)
{
return bdev->bd_disk->queue;