switch {__,}blockdev_direct_IO() to iov_iter

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/block_dev.c

@@ -171,8 +171,8 @@ blkdev_direct_IO(int rw, struct kiocb *iocb, struct iov_iter *iter,
 	struct file *file = iocb->ki_filp;
 	struct inode *inode = file->f_mapping->host;
 
-	return __blockdev_direct_IO(rw, iocb, inode, I_BDEV(inode), iter->iov,
-				    offset, iter->nr_segs, blkdev_get_block,
+	return __blockdev_direct_IO(rw, iocb, inode, I_BDEV(inode), iter,
+				    offset, blkdev_get_block,
 				    NULL, NULL, 0);
 }
 

fs/btrfs/inode.c

@@ -7483,8 +7483,7 @@ static ssize_t btrfs_direct_IO(int rw, struct kiocb *iocb,
 
 	ret = __blockdev_direct_IO(rw, iocb, inode,
 			BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev,
-			iter->iov, offset, iter->nr_segs,
-			btrfs_get_blocks_direct, NULL,
+			iter, offset, btrfs_get_blocks_direct, NULL,
 			btrfs_submit_direct, flags);
 	if (rw & WRITE) {
 		if (ret < 0 && ret != -EIOCBQUEUED)

fs/direct-io.c

@@ -1107,8 +1107,8 @@ static inline int drop_refcount(struct dio *dio)
  */
 static inline ssize_t
 do_blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
-	struct block_device *bdev, const struct iovec *iov, loff_t offset, 
-	unsigned long nr_segs, get_block_t get_block, dio_iodone_t end_io,
+	struct block_device *bdev, struct iov_iter *iter, loff_t offset, 
+	get_block_t get_block, dio_iodone_t end_io,
 	dio_submit_t submit_io,	int flags)
 {
 	int seg;
@@ -1143,9 +1143,9 @@ do_blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
 	}
 
 	/* Check the memory alignment.  Blocks cannot straddle pages */
-	for (seg = 0; seg < nr_segs; seg++) {
-		addr = (unsigned long)iov[seg].iov_base;
-		size = iov[seg].iov_len;
+	for (seg = 0; seg < iter->nr_segs; seg++) {
+		addr = (unsigned long)iter->iov[seg].iov_base;
+		size = iter->iov[seg].iov_len;
 		end += size;
 		if (unlikely((addr & blocksize_mask) ||
 			     (size & blocksize_mask))) {
@@ -1256,18 +1256,18 @@ do_blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
 	if (unlikely(sdio.blkfactor))
 		sdio.pages_in_io = 2;
 
-	for (seg = 0; seg < nr_segs; seg++) {
-		user_addr = (unsigned long)iov[seg].iov_base;
+	for (seg = 0; seg < iter->nr_segs; seg++) {
+		user_addr = (unsigned long)iter->iov[seg].iov_base;
 		sdio.pages_in_io +=
-			((user_addr + iov[seg].iov_len + PAGE_SIZE-1) /
+			((user_addr + iter->iov[seg].iov_len + PAGE_SIZE-1) /
 				PAGE_SIZE - user_addr / PAGE_SIZE);
 	}
 
 	blk_start_plug(&plug);
 
-	for (seg = 0; seg < nr_segs; seg++) {
-		user_addr = (unsigned long)iov[seg].iov_base;
-		sdio.size += bytes = iov[seg].iov_len;
+	for (seg = 0; seg < iter->nr_segs; seg++) {
+		user_addr = (unsigned long)iter->iov[seg].iov_base;
+		sdio.size += bytes = iter->iov[seg].iov_len;
 
 		/* Index into the first page of the first block */
 		sdio.first_block_in_page = (user_addr & ~PAGE_MASK) >> blkbits;
@@ -1288,7 +1288,7 @@ do_blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
 
 		retval = do_direct_IO(dio, &sdio, &map_bh);
 
-		dio->result += iov[seg].iov_len -
+		dio->result += iter->iov[seg].iov_len -
 			((sdio.final_block_in_request - sdio.block_in_file) <<
 					blkbits);
 
@@ -1365,8 +1365,8 @@ do_blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
 
 ssize_t
 __blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
-	struct block_device *bdev, const struct iovec *iov, loff_t offset,
-	unsigned long nr_segs, get_block_t get_block, dio_iodone_t end_io,
+	struct block_device *bdev, struct iov_iter *iter, loff_t offset,
+	get_block_t get_block, dio_iodone_t end_io,
 	dio_submit_t submit_io,	int flags)
 {
 	/*
@@ -1381,9 +1381,8 @@ __blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
 	prefetch(bdev->bd_queue);
 	prefetch((char *)bdev->bd_queue + SMP_CACHE_BYTES);
 
-	return do_blockdev_direct_IO(rw, iocb, inode, bdev, iov, offset,
-				     nr_segs, get_block, end_io,
-				     submit_io, flags);
+	return do_blockdev_direct_IO(rw, iocb, inode, bdev, iter, offset,
+				     get_block, end_io, submit_io, flags);
 }
 
 EXPORT_SYMBOL(__blockdev_direct_IO);

fs/ext2/inode.c

@@ -859,8 +859,7 @@ ext2_direct_IO(int rw, struct kiocb *iocb, struct iov_iter *iter,
 	size_t count = iov_iter_count(iter);
 	ssize_t ret;
 
-	ret = blockdev_direct_IO(rw, iocb, inode, iter->iov, offset,
-				 iter->nr_segs, ext2_get_block);
+	ret = blockdev_direct_IO(rw, iocb, inode, iter, offset, ext2_get_block);
 	if (ret < 0 && (rw & WRITE))
 		ext2_write_failed(mapping, offset + count);
 	return ret;

fs/ext3/inode.c

@@ -1855,8 +1855,7 @@ static ssize_t ext3_direct_IO(int rw, struct kiocb *iocb,
 	}
 
 retry:
-	ret = blockdev_direct_IO(rw, iocb, inode, iter->iov, offset,
-				 iter->nr_segs, ext3_get_block);
+	ret = blockdev_direct_IO(rw, iocb, inode, iter, offset, ext3_get_block);
 	/*
 	 * In case of error extending write may have instantiated a few
 	 * blocks outside i_size. Trim these off again.

fs/ext4/indirect.c

@@ -686,14 +686,13 @@ ssize_t ext4_ind_direct_IO(int rw, struct kiocb *iocb,
 			goto locked;
 		}
 		ret = __blockdev_direct_IO(rw, iocb, inode,
-				 inode->i_sb->s_bdev, iter->iov,
-				 offset, iter->nr_segs,
+				 inode->i_sb->s_bdev, iter, offset,
 				 ext4_get_block, NULL, NULL, 0);
 		inode_dio_done(inode);
 	} else {
 locked:
-		ret = blockdev_direct_IO(rw, iocb, inode, iter->iov,
-				 offset, iter->nr_segs, ext4_get_block);
+		ret = blockdev_direct_IO(rw, iocb, inode, iter,
+				 offset, ext4_get_block);
 
 		if (unlikely((rw & WRITE) && ret < 0)) {
 			loff_t isize = i_size_read(inode);

fs/ext4/inode.c

@@ -3166,8 +3166,8 @@ static ssize_t ext4_ext_direct_IO(int rw, struct kiocb *iocb,
 		dio_flags = DIO_LOCKING;
 	}
 	ret = __blockdev_direct_IO(rw, iocb, inode,
-				   inode->i_sb->s_bdev, iter->iov,
-				   offset, iter->nr_segs,
+				   inode->i_sb->s_bdev, iter,
+				   offset,
 				   get_block_func,
 				   ext4_end_io_dio,
 				   NULL,

fs/f2fs/data.c

@@ -1022,8 +1022,8 @@ static ssize_t f2fs_direct_IO(int rw, struct kiocb *iocb,
 	if (check_direct_IO(inode, rw, iter->iov, offset, iter->nr_segs))
 		return 0;
 
-	return blockdev_direct_IO(rw, iocb, inode, iter->iov, offset,
-				  iter->nr_segs, get_data_block);
+	return blockdev_direct_IO(rw, iocb, inode, iter, offset,
+				  get_data_block);
 }
 
 static void f2fs_invalidate_data_page(struct page *page, unsigned int offset,

fs/fat/inode.c

@@ -213,8 +213,7 @@ static ssize_t fat_direct_IO(int rw, struct kiocb *iocb,
 	 * FAT need to use the DIO_LOCKING for avoiding the race
 	 * condition of fat_get_block() and ->truncate().
 	 */
-	ret = blockdev_direct_IO(rw, iocb, inode, iter->iov, offset,
-				 iter->nr_segs, fat_get_block);
+	ret = blockdev_direct_IO(rw, iocb, inode, iter, offset, fat_get_block);
 	if (ret < 0 && (rw & WRITE))
 		fat_write_failed(mapping, offset + count);
 

fs/gfs2/aops.c

@@ -1097,7 +1097,7 @@ static ssize_t gfs2_direct_IO(int rw, struct kiocb *iocb,
 	}
 
 	rv = __blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev,
-				  iter->iov, offset, iter->nr_segs,
+				  iter, offset,
 				  gfs2_get_block_direct, NULL, NULL, 0);
 out:
 	gfs2_glock_dq(&gh);

fs/hfs/inode.c

@@ -133,8 +133,7 @@ static ssize_t hfs_direct_IO(int rw, struct kiocb *iocb,
 	size_t count = iov_iter_count(iter);
 	ssize_t ret;
 
-	ret = blockdev_direct_IO(rw, iocb, inode, iter->iov, offset,
-				 iter->nr_segs, hfs_get_block);
+	ret = blockdev_direct_IO(rw, iocb, inode, iter, offset, hfs_get_block);
 
 	/*
 	 * In case of error extending write may have instantiated a few

fs/hfsplus/inode.c

@@ -131,7 +131,7 @@ static ssize_t hfsplus_direct_IO(int rw, struct kiocb *iocb,
 	size_t count = iov_iter_count(iter);
 	ssize_t ret;
 
-	ret = blockdev_direct_IO(rw, iocb, inode, iter->iov, offset, iter->nr_segs,
+	ret = blockdev_direct_IO(rw, iocb, inode, iter, offset, 
 				 hfsplus_get_block);
 
 	/*

fs/jfs/inode.c

@@ -339,8 +339,7 @@ static ssize_t jfs_direct_IO(int rw, struct kiocb *iocb,
 	size_t count = iov_iter_count(iter);
 	ssize_t ret;
 
-	ret = blockdev_direct_IO(rw, iocb, inode, iter->iov, offset,
-				 iter->nr_segs, jfs_get_block);
+	ret = blockdev_direct_IO(rw, iocb, inode, iter, offset, jfs_get_block);
 
 	/*
 	 * In case of error extending write may have instantiated a few

fs/nilfs2/inode.c

@@ -311,8 +311,8 @@ nilfs_direct_IO(int rw, struct kiocb *iocb, struct iov_iter *iter,
 		return 0;
 
 	/* Needs synchronization with the cleaner */
-	size = blockdev_direct_IO(rw, iocb, inode, iter->iov, offset,
-				  iter->nr_segs, nilfs_get_block);
+	size = blockdev_direct_IO(rw, iocb, inode, iter, offset,
+				  nilfs_get_block);
 
 	/*
 	 * In case of error extending write may have instantiated a few

fs/ocfs2/aops.c

@@ -617,7 +617,7 @@ static ssize_t ocfs2_direct_IO(int rw,
 		return 0;
 
 	return __blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev,
-				    iter->iov, offset, iter->nr_segs,
+				    iter, offset,
 				    ocfs2_direct_IO_get_blocks,
 				    ocfs2_dio_end_io, NULL, 0);
 }

fs/reiserfs/inode.c

@@ -3090,8 +3090,8 @@ static ssize_t reiserfs_direct_IO(int rw, struct kiocb *iocb,
 	size_t count = iov_iter_count(iter);
 	ssize_t ret;
 
-	ret = blockdev_direct_IO(rw, iocb, inode, iter->iov, offset,
-				 iter->nr_segs, reiserfs_get_blocks_direct_io);
+	ret = blockdev_direct_IO(rw, iocb, inode, iter, offset,
+				 reiserfs_get_blocks_direct_io);
 
 	/*
 	 * In case of error extending write may have instantiated a few

fs/udf/inode.c

@@ -226,8 +226,7 @@ static ssize_t udf_direct_IO(int rw, struct kiocb *iocb,
 	size_t count = iov_iter_count(iter);
 	ssize_t ret;
 
-	ret = blockdev_direct_IO(rw, iocb, inode, iter->iov, offset, iter->nr_segs,
-				  udf_get_block);
+	ret = blockdev_direct_IO(rw, iocb, inode, iter, offset, udf_get_block);
 	if (unlikely(ret < 0 && (rw & WRITE)))
 		udf_write_failed(mapping, offset + count);
 	return ret;

fs/xfs/xfs_aops.c

@@ -1470,17 +1470,15 @@ xfs_vm_direct_IO(
 		if (offset + size > XFS_I(inode)->i_d.di_size)
 			ioend->io_isdirect = 1;
 
-		ret = __blockdev_direct_IO(rw, iocb, inode, bdev, iter->iov,
-					    offset, iter->nr_segs,
-					    xfs_get_blocks_direct,
+		ret = __blockdev_direct_IO(rw, iocb, inode, bdev, iter,
+					    offset, xfs_get_blocks_direct,
 					    xfs_end_io_direct_write, NULL,
 					    DIO_ASYNC_EXTEND);
 		if (ret != -EIOCBQUEUED && iocb->private)
 			goto out_destroy_ioend;
 	} else {
-		ret = __blockdev_direct_IO(rw, iocb, inode, bdev, iter->iov,
-					    offset, iter->nr_segs,
-					    xfs_get_blocks_direct,
+		ret = __blockdev_direct_IO(rw, iocb, inode, bdev, iter,
+					    offset, xfs_get_blocks_direct,
 					    NULL, NULL, 0);
 	}
 

include/linux/fs.h

@@ -2474,16 +2474,16 @@ enum {
 void dio_end_io(struct bio *bio, int error);
 
 ssize_t __blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
-	struct block_device *bdev, const struct iovec *iov, loff_t offset,
-	unsigned long nr_segs, get_block_t get_block, dio_iodone_t end_io,
+	struct block_device *bdev, struct iov_iter *iter, loff_t offset,
+	get_block_t get_block, dio_iodone_t end_io,
 	dio_submit_t submit_io,	int flags);
 
 static inline ssize_t blockdev_direct_IO(int rw, struct kiocb *iocb,
-		struct inode *inode, const struct iovec *iov, loff_t offset,
-		unsigned long nr_segs, get_block_t get_block)
+		struct inode *inode, struct iov_iter *iter, loff_t offset,
+		get_block_t get_block)
 {
-	return __blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov,
-				    offset, nr_segs, get_block, NULL, NULL,
+	return __blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iter,
+				    offset, get_block, NULL, NULL,
 				    DIO_LOCKING | DIO_SKIP_HOLES);
 }
 #endif