btrfs: pass a btrfs_inode to btrfs_fdatawrite_range()

Instead of passing a (VFS) inode pointer argument, pass a btrfs_inode
instead, as this is generally what we do for internal APIs, making it
more consistent with most of the code base. This will later allow to
help to remove a lot of BTRFS_I() calls in btrfs_sync_file().
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/file.c

@@ -1625,7 +1625,7 @@ static ssize_t btrfs_direct_write(struct kiocb *iocb, struct iov_iter *from)
 	 * able to read what was just written.
 	 */
 	endbyte = pos + written_buffered - 1;
-	ret = btrfs_fdatawrite_range(inode, pos, endbyte);
+	ret = btrfs_fdatawrite_range(BTRFS_I(inode), pos, endbyte);
 	if (ret)
 		goto out;
 	ret = filemap_fdatawait_range(inode->i_mapping, pos, endbyte);
@@ -1738,7 +1738,7 @@ int btrfs_release_file(struct inode *inode, struct file *filp)
 	return 0;
 }
 
-static int start_ordered_ops(struct inode *inode, loff_t start, loff_t end)
+static int start_ordered_ops(struct btrfs_inode *inode, loff_t start, loff_t end)
 {
 	int ret;
 	struct blk_plug plug;
@@ -1825,7 +1825,7 @@ int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
 	 * multi-task, and make the performance up.  See
 	 * btrfs_wait_ordered_range for an explanation of the ASYNC check.
 	 */
-	ret = start_ordered_ops(inode, start, end);
+	ret = start_ordered_ops(BTRFS_I(inode), start, end);
 	if (ret)
 		goto out;
 
@@ -1851,7 +1851,7 @@ int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
 	 * So trigger writeback for any eventual new dirty pages and then we
 	 * wait for all ordered extents to complete below.
 	 */
-	ret = start_ordered_ops(inode, start, end);
+	ret = start_ordered_ops(BTRFS_I(inode), start, end);
 	if (ret) {
 		btrfs_inode_unlock(BTRFS_I(inode), BTRFS_ILOCK_MMAP);
 		goto out;
@@ -4045,8 +4045,9 @@ const struct file_operations btrfs_file_operations = {
 	.fop_flags	= FOP_BUFFER_RASYNC | FOP_BUFFER_WASYNC,
 };
 
-int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end)
+int btrfs_fdatawrite_range(struct btrfs_inode *inode, loff_t start, loff_t end)
 {
+	struct address_space *mapping = inode->vfs_inode.i_mapping;
 	int ret;
 
 	/*
@@ -4063,10 +4064,9 @@ int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end)
 	 * know better and pull this out at some point in the future, it is
 	 * right and you are wrong.
 	 */
-	ret = filemap_fdatawrite_range(inode->i_mapping, start, end);
-	if (!ret && test_bit(BTRFS_INODE_HAS_ASYNC_EXTENT,
-			     &BTRFS_I(inode)->runtime_flags))
-		ret = filemap_fdatawrite_range(inode->i_mapping, start, end);
+	ret = filemap_fdatawrite_range(mapping, start, end);
+	if (!ret && test_bit(BTRFS_INODE_HAS_ASYNC_EXTENT, &inode->runtime_flags))
+		ret = filemap_fdatawrite_range(mapping, start, end);
 
 	return ret;
 }

fs/btrfs/file.h

@@ -37,7 +37,7 @@ int btrfs_release_file(struct inode *inode, struct file *file);
 int btrfs_dirty_pages(struct btrfs_inode *inode, struct page **pages,
 		      size_t num_pages, loff_t pos, size_t write_bytes,
 		      struct extent_state **cached, bool noreserve);
-int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
+int btrfs_fdatawrite_range(struct btrfs_inode *inode, loff_t start, loff_t end);
 int btrfs_check_nocow_lock(struct btrfs_inode *inode, loff_t pos,
 			   size_t *write_bytes, bool nowait);
 void btrfs_check_nocow_unlock(struct btrfs_inode *inode);

fs/btrfs/free-space-cache.c

@@ -1483,7 +1483,7 @@ static int __btrfs_write_out_cache(struct inode *inode,
 	io_ctl->entries = entries;
 	io_ctl->bitmaps = bitmaps;
 
-	ret = btrfs_fdatawrite_range(inode, 0, (u64)-1);
+	ret = btrfs_fdatawrite_range(BTRFS_I(inode), 0, (u64)-1);
 	if (ret)
 		goto out;
 

fs/btrfs/ordered-data.c

@@ -859,7 +859,7 @@ int btrfs_wait_ordered_range(struct inode *inode, u64 start, u64 len)
 	/* start IO across the range first to instantiate any delalloc
 	 * extents
 	 */
-	ret = btrfs_fdatawrite_range(inode, start, orig_end);
+	ret = btrfs_fdatawrite_range(BTRFS_I(inode), start, orig_end);
 	if (ret)
 		return ret;