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Diffstat (limited to 'block/fops.c')
-rw-r--r--block/fops.c32
1 files changed, 14 insertions, 18 deletions
diff --git a/block/fops.c b/block/fops.c
index 679d9b752fe8..7a163f7fe2d8 100644
--- a/block/fops.c
+++ b/block/fops.c
@@ -44,18 +44,15 @@ static bool blkdev_dio_unaligned(struct block_device *bdev, loff_t pos,
#define DIO_INLINE_BIO_VECS 4
static ssize_t __blkdev_direct_IO_simple(struct kiocb *iocb,
- struct iov_iter *iter, unsigned int nr_pages)
+ struct iov_iter *iter, struct block_device *bdev,
+ unsigned int nr_pages)
{
- struct block_device *bdev = I_BDEV(iocb->ki_filp->f_mapping->host);
struct bio_vec inline_vecs[DIO_INLINE_BIO_VECS], *vecs;
loff_t pos = iocb->ki_pos;
bool should_dirty = false;
struct bio bio;
ssize_t ret;
- if (blkdev_dio_unaligned(bdev, pos, iter))
- return -EINVAL;
-
if (nr_pages <= DIO_INLINE_BIO_VECS)
vecs = inline_vecs;
else {
@@ -161,9 +158,8 @@ static void blkdev_bio_end_io(struct bio *bio)
}
static ssize_t __blkdev_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
- unsigned int nr_pages)
+ struct block_device *bdev, unsigned int nr_pages)
{
- struct block_device *bdev = I_BDEV(iocb->ki_filp->f_mapping->host);
struct blk_plug plug;
struct blkdev_dio *dio;
struct bio *bio;
@@ -172,9 +168,6 @@ static ssize_t __blkdev_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
loff_t pos = iocb->ki_pos;
int ret = 0;
- if (blkdev_dio_unaligned(bdev, pos, iter))
- return -EINVAL;
-
if (iocb->ki_flags & IOCB_ALLOC_CACHE)
opf |= REQ_ALLOC_CACHE;
bio = bio_alloc_bioset(bdev, nr_pages, opf, GFP_KERNEL,
@@ -302,9 +295,9 @@ static void blkdev_bio_end_io_async(struct bio *bio)
static ssize_t __blkdev_direct_IO_async(struct kiocb *iocb,
struct iov_iter *iter,
+ struct block_device *bdev,
unsigned int nr_pages)
{
- struct block_device *bdev = I_BDEV(iocb->ki_filp->f_mapping->host);
bool is_read = iov_iter_rw(iter) == READ;
blk_opf_t opf = is_read ? REQ_OP_READ : dio_bio_write_op(iocb);
struct blkdev_dio *dio;
@@ -312,9 +305,6 @@ static ssize_t __blkdev_direct_IO_async(struct kiocb *iocb,
loff_t pos = iocb->ki_pos;
int ret = 0;
- if (blkdev_dio_unaligned(bdev, pos, iter))
- return -EINVAL;
-
if (iocb->ki_flags & IOCB_ALLOC_CACHE)
opf |= REQ_ALLOC_CACHE;
bio = bio_alloc_bioset(bdev, nr_pages, opf, GFP_KERNEL,
@@ -368,18 +358,23 @@ static ssize_t __blkdev_direct_IO_async(struct kiocb *iocb,
static ssize_t blkdev_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
{
+ struct block_device *bdev = I_BDEV(iocb->ki_filp->f_mapping->host);
unsigned int nr_pages;
if (!iov_iter_count(iter))
return 0;
+ if (blkdev_dio_unaligned(bdev, iocb->ki_pos, iter))
+ return -EINVAL;
+
nr_pages = bio_iov_vecs_to_alloc(iter, BIO_MAX_VECS + 1);
if (likely(nr_pages <= BIO_MAX_VECS)) {
if (is_sync_kiocb(iocb))
- return __blkdev_direct_IO_simple(iocb, iter, nr_pages);
- return __blkdev_direct_IO_async(iocb, iter, nr_pages);
+ return __blkdev_direct_IO_simple(iocb, iter, bdev,
+ nr_pages);
+ return __blkdev_direct_IO_async(iocb, iter, bdev, nr_pages);
}
- return __blkdev_direct_IO(iocb, iter, bio_max_segs(nr_pages));
+ return __blkdev_direct_IO(iocb, iter, bdev, bio_max_segs(nr_pages));
}
static int blkdev_iomap_begin(struct inode *inode, loff_t offset, loff_t length,
@@ -390,7 +385,7 @@ static int blkdev_iomap_begin(struct inode *inode, loff_t offset, loff_t length,
iomap->bdev = bdev;
iomap->offset = ALIGN_DOWN(offset, bdev_logical_block_size(bdev));
- if (iomap->offset >= isize)
+ if (offset >= isize)
return -EIO;
iomap->type = IOMAP_MAPPED;
iomap->addr = iomap->offset;
@@ -863,6 +858,7 @@ const struct file_operations def_blk_fops = {
.splice_read = filemap_splice_read,
.splice_write = iter_file_splice_write,
.fallocate = blkdev_fallocate,
+ .fop_flags = FOP_BUFFER_RASYNC,
};
static __init int blkdev_init(void)