btrfs: extent-tree: Switch to new delalloc space reserve and release

Use new __btrfs_delalloc_reserve_space() and
__btrfs_delalloc_release_space() to reserve and release space for
delalloc.
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>

fs/btrfs/file.c

@@ -1608,7 +1608,7 @@ static noinline ssize_t __btrfs_buffered_write(struct file *file,
 				btrfs_delalloc_release_metadata(inode,
 								release_bytes);
 			else
-				btrfs_delalloc_release_space(inode,
+				__btrfs_delalloc_release_space(inode, pos,
 							     release_bytes);
 		}
 
@@ -1661,7 +1661,8 @@ static noinline ssize_t __btrfs_buffered_write(struct file *file,
 			btrfs_end_write_no_snapshoting(root);
 			btrfs_delalloc_release_metadata(inode, release_bytes);
 		} else {
-			btrfs_delalloc_release_space(inode, release_bytes);
+			__btrfs_delalloc_release_space(inode, pos,
+						       release_bytes);
 		}
 	}
 

fs/btrfs/inode-map.c

@@ -488,17 +488,17 @@ int btrfs_save_ino_cache(struct btrfs_root *root,
 	/* Just to make sure we have enough space */
 	prealloc += 8 * PAGE_CACHE_SIZE;
 
-	ret = btrfs_delalloc_reserve_space(inode, prealloc);
+	ret = __btrfs_delalloc_reserve_space(inode, 0, prealloc);
 	if (ret)
 		goto out_put;
 
 	ret = btrfs_prealloc_file_range_trans(inode, trans, 0, 0, prealloc,
 					      prealloc, prealloc, &alloc_hint);
 	if (ret) {
-		btrfs_delalloc_release_space(inode, prealloc);
+		__btrfs_delalloc_release_space(inode, 0, prealloc);
 		goto out_put;
 	}
-	btrfs_free_reserved_data_space(inode, prealloc);
+	__btrfs_free_reserved_data_space(inode, 0, prealloc);
 
 	ret = btrfs_write_out_ino_cache(root, trans, path, inode);
 out_put:

fs/btrfs/inode.c

@@ -1769,7 +1769,8 @@ static void btrfs_clear_bit_hook(struct inode *inode,
 
 		if (root->root_key.objectid != BTRFS_DATA_RELOC_TREE_OBJECTID
 		    && do_list && !(state->state & EXTENT_NORESERVE))
-			btrfs_free_reserved_data_space(inode, len);
+			__btrfs_free_reserved_data_space(inode, state->start,
+							 len);
 
 		__percpu_counter_add(&root->fs_info->delalloc_bytes, -len,
 				     root->fs_info->delalloc_batch);
@@ -1992,7 +1993,8 @@ static void btrfs_writepage_fixup_worker(struct btrfs_work *work)
 		goto again;
 	}
 
-	ret = btrfs_delalloc_reserve_space(inode, PAGE_CACHE_SIZE);
+	ret = __btrfs_delalloc_reserve_space(inode, page_start,
+					     PAGE_CACHE_SIZE);
 	if (ret) {
 		mapping_set_error(page->mapping, ret);
 		end_extent_writepage(page, ret, page_start, page_end);
@@ -4638,14 +4640,17 @@ int btrfs_truncate_page(struct inode *inode, loff_t from, loff_t len,
 	if ((offset & (blocksize - 1)) == 0 &&
 	    (!len || ((len & (blocksize - 1)) == 0)))
 		goto out;
-	ret = btrfs_delalloc_reserve_space(inode, PAGE_CACHE_SIZE);
+	ret = __btrfs_delalloc_reserve_space(inode,
+			round_down(from, PAGE_CACHE_SIZE), PAGE_CACHE_SIZE);
 	if (ret)
 		goto out;
 
 again:
 	page = find_or_create_page(mapping, index, mask);
 	if (!page) {
-		btrfs_delalloc_release_space(inode, PAGE_CACHE_SIZE);
+		__btrfs_delalloc_release_space(inode,
+				round_down(from, PAGE_CACHE_SIZE),
+				PAGE_CACHE_SIZE);
 		ret = -ENOMEM;
 		goto out;
 	}
@@ -4713,7 +4718,8 @@ int btrfs_truncate_page(struct inode *inode, loff_t from, loff_t len,
 
 out_unlock:
 	if (ret)
-		btrfs_delalloc_release_space(inode, PAGE_CACHE_SIZE);
+		__btrfs_delalloc_release_space(inode, page_start,
+					       PAGE_CACHE_SIZE);
 	unlock_page(page);
 	page_cache_release(page);
 out:
@@ -7644,7 +7650,7 @@ static int btrfs_get_blocks_direct(struct inode *inode, sector_t iblock,
 			spin_unlock(&BTRFS_I(inode)->lock);
 		}
 
-		btrfs_free_reserved_data_space(inode, len);
+		__btrfs_free_reserved_data_space(inode, start, len);
 		WARN_ON(dio_data->reserve < len);
 		dio_data->reserve -= len;
 		current->journal_info = dio_data;
@@ -8434,7 +8440,7 @@ static ssize_t btrfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
 			mutex_unlock(&inode->i_mutex);
 			relock = true;
 		}
-		ret = btrfs_delalloc_reserve_space(inode, count);
+		ret = __btrfs_delalloc_reserve_space(inode, offset, count);
 		if (ret)
 			goto out;
 		dio_data.outstanding_extents = div64_u64(count +
@@ -8463,10 +8469,10 @@ static ssize_t btrfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
 		current->journal_info = NULL;
 		if (ret < 0 && ret != -EIOCBQUEUED) {
 			if (dio_data.reserve)
-				btrfs_delalloc_release_space(inode,
+				__btrfs_delalloc_release_space(inode, offset,
 						dio_data.reserve);
 		} else if (ret >= 0 && (size_t)ret < count)
-			btrfs_delalloc_release_space(inode,
+			__btrfs_delalloc_release_space(inode, offset,
 						       count - (size_t)ret);
 	}
 out:
@@ -8675,7 +8681,11 @@ int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
 	u64 page_end;
 
 	sb_start_pagefault(inode->i_sb);
-	ret  = btrfs_delalloc_reserve_space(inode, PAGE_CACHE_SIZE);
+	page_start = page_offset(page);
+	page_end = page_start + PAGE_CACHE_SIZE - 1;
+
+	ret = __btrfs_delalloc_reserve_space(inode, page_start,
+					     PAGE_CACHE_SIZE);
 	if (!ret) {
 		ret = file_update_time(vma->vm_file);
 		reserved = 1;
@@ -8694,8 +8704,6 @@ int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
 again:
 	lock_page(page);
 	size = i_size_read(inode);
-	page_start = page_offset(page);
-	page_end = page_start + PAGE_CACHE_SIZE - 1;
 
 	if ((page->mapping != inode->i_mapping) ||
 	    (page_start >= size)) {
@@ -8772,7 +8780,7 @@ int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
 	}
 	unlock_page(page);
 out:
-	btrfs_delalloc_release_space(inode, PAGE_CACHE_SIZE);
+	__btrfs_delalloc_release_space(inode, page_start, PAGE_CACHE_SIZE);
 out_noreserve:
 	sb_end_pagefault(inode->i_sb);
 	return ret;

fs/btrfs/ioctl.c

@@ -1119,7 +1119,8 @@ static int cluster_pages_for_defrag(struct inode *inode,
 
 	page_cnt = min_t(u64, (u64)num_pages, (u64)file_end - start_index + 1);
 
-	ret = btrfs_delalloc_reserve_space(inode,
+	ret = __btrfs_delalloc_reserve_space(inode,
+			start_index << PAGE_CACHE_SHIFT,
 			page_cnt << PAGE_CACHE_SHIFT);
 	if (ret)
 		return ret;
@@ -1209,7 +1210,8 @@ static int cluster_pages_for_defrag(struct inode *inode,
 		spin_lock(&BTRFS_I(inode)->lock);
 		BTRFS_I(inode)->outstanding_extents++;
 		spin_unlock(&BTRFS_I(inode)->lock);
-		btrfs_delalloc_release_space(inode,
+		__btrfs_delalloc_release_space(inode,
+				start_index << PAGE_CACHE_SHIFT,
 				(page_cnt - i_done) << PAGE_CACHE_SHIFT);
 	}
 
@@ -1235,7 +1237,9 @@ static int cluster_pages_for_defrag(struct inode *inode,
 		unlock_page(pages[i]);
 		page_cache_release(pages[i]);
 	}
-	btrfs_delalloc_release_space(inode, page_cnt << PAGE_CACHE_SHIFT);
+	__btrfs_delalloc_release_space(inode,
+			start_index << PAGE_CACHE_SHIFT,
+			page_cnt << PAGE_CACHE_SHIFT);
 	return ret;
 
 }