Btrfs: cleanup arguments to extent_clear_unlock_delalloc

This patch removes the io_tree argument for extent_clear_unlock_delalloc since
we always use &BTRFS_I(inode)->io_tree, and it separates out the extent tree
operations from the page operations.  This way we just pass in the extent bits
we want to clear and then pass in the operations we want done to the pages.
This is because I'm going to fix what extent bits we clear in some cases and
rather than add a bunch of new flags we'll just use the actual extent bits we
want to clear.  Thanks,

Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>

3 files changed, 85 insertions, 130 deletions

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index daf180dafe39..c137f98fbd24 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -1678,31 +1678,21 @@ out_failed:
 	return found;
 }
 
-int extent_clear_unlock_delalloc(struct inode *inode,
-				struct extent_io_tree *tree,
-				u64 start, u64 end, struct page *locked_page,
-				unsigned long op)
+int extent_clear_unlock_delalloc(struct inode *inode, u64 start, u64 end,
+				 struct page *locked_page,
+				 unsigned long clear_bits,
+				 unsigned long page_ops)
 {
+	struct extent_io_tree *tree = &BTRFS_I(inode)->io_tree;
 	int ret;
 	struct page *pages[16];
 	unsigned long index = start >> PAGE_CACHE_SHIFT;
 	unsigned long end_index = end >> PAGE_CACHE_SHIFT;
 	unsigned long nr_pages = end_index - index + 1;
 	int i;
-	unsigned long clear_bits = 0;
-
-	if (op & EXTENT_CLEAR_UNLOCK)
-		clear_bits |= EXTENT_LOCKED;
-	if (op & EXTENT_CLEAR_DIRTY)
-		clear_bits |= EXTENT_DIRTY;
-
-	if (op & EXTENT_CLEAR_DELALLOC)
-		clear_bits |= EXTENT_DELALLOC;
 
 	clear_extent_bit(tree, start, end, clear_bits, 1, 0, NULL, GFP_NOFS);
-	if (!(op & (EXTENT_CLEAR_UNLOCK_PAGE | EXTENT_CLEAR_DIRTY |
-		    EXTENT_SET_WRITEBACK | EXTENT_END_WRITEBACK |
-		    EXTENT_SET_PRIVATE2)))
+	if (page_ops == 0)
 		return 0;
 
 	while (nr_pages > 0) {
@@ -1711,20 +1701,20 @@ int extent_clear_unlock_delalloc(struct inode *inode,
 				     nr_pages, ARRAY_SIZE(pages)), pages);
 		for (i = 0; i < ret; i++) {
 
-			if (op & EXTENT_SET_PRIVATE2)
+			if (page_ops & PAGE_SET_PRIVATE2)
 				SetPagePrivate2(pages[i]);
 
 			if (pages[i] == locked_page) {
 				page_cache_release(pages[i]);
 				continue;
 			}
-			if (op & EXTENT_CLEAR_DIRTY)
+			if (page_ops & PAGE_CLEAR_DIRTY)
 				clear_page_dirty_for_io(pages[i]);
-			if (op & EXTENT_SET_WRITEBACK)
+			if (page_ops & PAGE_SET_WRITEBACK)
 				set_page_writeback(pages[i]);
-			if (op & EXTENT_END_WRITEBACK)
+			if (page_ops & PAGE_END_WRITEBACK)
 				end_page_writeback(pages[i]);
-			if (op & EXTENT_CLEAR_UNLOCK_PAGE)
+			if (page_ops & PAGE_UNLOCK)
 				unlock_page(pages[i]);
 			page_cache_release(pages[i]);
 		}
diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h
index f7544afefdb9..c450620a333f 100644
--- a/fs/btrfs/extent_io.h
+++ b/fs/btrfs/extent_io.h
@@ -44,14 +44,11 @@
 #define EXTENT_BUFFER_DUMMY 9
 
 /* these are flags for extent_clear_unlock_delalloc */
-#define EXTENT_CLEAR_UNLOCK_PAGE 0x1
-#define EXTENT_CLEAR_UNLOCK	 0x2
-#define EXTENT_CLEAR_DELALLOC	 0x4
-#define EXTENT_CLEAR_DIRTY	 0x8
-#define EXTENT_SET_WRITEBACK	 0x10
-#define EXTENT_END_WRITEBACK	 0x20
-#define EXTENT_SET_PRIVATE2	 0x40
-#define EXTENT_CLEAR_ACCOUNTING  0x80
+#define PAGE_UNLOCK		(1 << 0)
+#define PAGE_CLEAR_DIRTY	(1 << 1)
+#define PAGE_SET_WRITEBACK	(1 << 2)
+#define PAGE_END_WRITEBACK	(1 << 3)
+#define PAGE_SET_PRIVATE2	(1 << 4)
 
 /*
  * page->private values.  Every page that is controlled by the extent
@@ -328,10 +325,10 @@ int map_private_extent_buffer(struct extent_buffer *eb, unsigned long offset,
 		      unsigned long *map_len);
 int extent_range_clear_dirty_for_io(struct inode *inode, u64 start, u64 end);
 int extent_range_redirty_for_io(struct inode *inode, u64 start, u64 end);
-int extent_clear_unlock_delalloc(struct inode *inode,
-				struct extent_io_tree *tree,
-				u64 start, u64 end, struct page *locked_page,
-				unsigned long op);
+int extent_clear_unlock_delalloc(struct inode *inode, u64 start, u64 end,
+				 struct page *locked_page,
+				 unsigned long bits_to_clear,
+				 unsigned long page_ops);
 struct bio *
 btrfs_bio_alloc(struct block_device *bdev, u64 first_sector, int nr_vecs,
 		gfp_t gfp_flags);
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index b47330c8e02c..d6c915d82b4a 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -489,13 +489,13 @@ cont:
 			 * we don't need to create any more async work items.
 			 * Unlock and free up our temp pages.
 			 */
-			extent_clear_unlock_delalloc(inode,
-			     &BTRFS_I(inode)->io_tree,
-			     start, end, NULL,
-			     EXTENT_CLEAR_UNLOCK_PAGE | EXTENT_CLEAR_DIRTY |
-			     EXTENT_CLEAR_DELALLOC |
-			     EXTENT_SET_WRITEBACK | EXTENT_END_WRITEBACK);
-
+			extent_clear_unlock_delalloc(inode, start, end, NULL,
+						     EXTENT_DIRTY |
+						     EXTENT_DELALLOC,
+						     PAGE_UNLOCK |
+						     PAGE_CLEAR_DIRTY |
+						     PAGE_SET_WRITEBACK |
+						     PAGE_END_WRITEBACK);
 			btrfs_end_transaction(trans, root);
 			goto free_pages_out;
 		}
@@ -592,13 +592,10 @@ free_pages_out:
 	goto out;
 
 cleanup_and_out:
-	extent_clear_unlock_delalloc(inode, &BTRFS_I(inode)->io_tree,
-				     start, end, NULL,
-				     EXTENT_CLEAR_UNLOCK_PAGE |
-				     EXTENT_CLEAR_DIRTY |
-				     EXTENT_CLEAR_DELALLOC |
-				     EXTENT_SET_WRITEBACK |
-				     EXTENT_END_WRITEBACK);
+	extent_clear_unlock_delalloc(inode, start, end, NULL,
+				     EXTENT_DIRTY | EXTENT_DELALLOC,
+				     PAGE_UNLOCK | PAGE_CLEAR_DIRTY |
+				     PAGE_SET_WRITEBACK | PAGE_END_WRITEBACK);
 	if (!trans || IS_ERR(trans))
 		btrfs_error(root->fs_info, ret, "Failed to join transaction");
 	else
@@ -770,16 +767,12 @@ retry:
 		/*
 		 * clear dirty, set writeback and unlock the pages.
 		 */
-		extent_clear_unlock_delalloc(inode,
-				&BTRFS_I(inode)->io_tree,
-				async_extent->start,
+		extent_clear_unlock_delalloc(inode, async_extent->start,
 				async_extent->start +
 				async_extent->ram_size - 1,
-				NULL, EXTENT_CLEAR_UNLOCK_PAGE |
-				EXTENT_CLEAR_UNLOCK |
-				EXTENT_CLEAR_DELALLOC |
-				EXTENT_CLEAR_DIRTY | EXTENT_SET_WRITEBACK);
-
+				NULL, EXTENT_LOCKED | EXTENT_DELALLOC |
+				EXTENT_DIRTY, PAGE_UNLOCK | PAGE_CLEAR_DIRTY |
+				PAGE_SET_WRITEBACK);
 		ret = btrfs_submit_compressed_write(inode,
 				    async_extent->start,
 				    async_extent->ram_size,
@@ -798,16 +791,13 @@ out:
 out_free_reserve:
 	btrfs_free_reserved_extent(root, ins.objectid, ins.offset);
 out_free:
-	extent_clear_unlock_delalloc(inode, &BTRFS_I(inode)->io_tree,
-				     async_extent->start,
+	extent_clear_unlock_delalloc(inode, async_extent->start,
 				     async_extent->start +
 				     async_extent->ram_size - 1,
-				     NULL, EXTENT_CLEAR_UNLOCK_PAGE |
-				     EXTENT_CLEAR_UNLOCK |
-				     EXTENT_CLEAR_DELALLOC |
-				     EXTENT_CLEAR_DIRTY |
-				     EXTENT_SET_WRITEBACK |
-				     EXTENT_END_WRITEBACK);
+				     NULL, EXTENT_LOCKED | EXTENT_DELALLOC |
+				     EXTENT_DIRTY, PAGE_UNLOCK |
+				     PAGE_CLEAR_DIRTY | PAGE_SET_WRITEBACK |
+				     PAGE_END_WRITEBACK);
 	kfree(async_extent);
 	goto again;
 }
@@ -892,15 +882,11 @@ static noinline int __cow_file_range(struct btrfs_trans_handle *trans,
 		ret = cow_file_range_inline(trans, root, inode,
 					    start, end, 0, 0, NULL);
 		if (ret == 0) {
-			extent_clear_unlock_delalloc(inode,
-				     &BTRFS_I(inode)->io_tree,
-				     start, end, NULL,
-				     EXTENT_CLEAR_UNLOCK_PAGE |
-				     EXTENT_CLEAR_UNLOCK |
-				     EXTENT_CLEAR_DELALLOC |
-				     EXTENT_CLEAR_DIRTY |
-				     EXTENT_SET_WRITEBACK |
-				     EXTENT_END_WRITEBACK);
+			extent_clear_unlock_delalloc(inode, start, end, NULL,
+				     EXTENT_LOCKED | EXTENT_DELALLOC |
+				     EXTENT_DIRTY, PAGE_UNLOCK |
+				     PAGE_CLEAR_DIRTY | PAGE_SET_WRITEBACK |
+				     PAGE_END_WRITEBACK);
 
 			*nr_written = *nr_written +
 			     (end - start + PAGE_CACHE_SIZE) / PAGE_CACHE_SIZE;
@@ -990,13 +976,13 @@ static noinline int __cow_file_range(struct btrfs_trans_handle *trans,
 		 * Do set the Private2 bit so we know this page was properly
 		 * setup for writepage
 		 */
-		op = unlock ? EXTENT_CLEAR_UNLOCK_PAGE : 0;
-		op |= EXTENT_CLEAR_UNLOCK | EXTENT_CLEAR_DELALLOC |
-			EXTENT_SET_PRIVATE2;
+		op = unlock ? PAGE_UNLOCK : 0;
+		op |= PAGE_SET_PRIVATE2;
 
-		extent_clear_unlock_delalloc(inode, &BTRFS_I(inode)->io_tree,
-					     start, start + ram_size - 1,
-					     locked_page, op);
+		extent_clear_unlock_delalloc(inode, start,
+					     start + ram_size - 1, locked_page,
+					     EXTENT_LOCKED | EXTENT_DELALLOC,
+					     op);
 		disk_num_bytes -= cur_alloc_size;
 		num_bytes -= cur_alloc_size;
 		alloc_hint = ins.objectid + ins.offset;
@@ -1008,16 +994,11 @@ out:
 out_reserve:
 	btrfs_free_reserved_extent(root, ins.objectid, ins.offset);
 out_unlock:
-	extent_clear_unlock_delalloc(inode,
-		     &BTRFS_I(inode)->io_tree,
-		     start, end, locked_page,
-		     EXTENT_CLEAR_UNLOCK_PAGE |
-		     EXTENT_CLEAR_UNLOCK |
-		     EXTENT_CLEAR_DELALLOC |
-		     EXTENT_CLEAR_DIRTY |
-		     EXTENT_SET_WRITEBACK |
-		     EXTENT_END_WRITEBACK);
-
+	extent_clear_unlock_delalloc(inode, start, end, locked_page,
+				     EXTENT_LOCKED | EXTENT_DIRTY |
+				     EXTENT_DELALLOC, PAGE_UNLOCK |
+				     PAGE_CLEAR_DIRTY | PAGE_SET_WRITEBACK |
+				     PAGE_END_WRITEBACK);
 	goto out;
 }
 
@@ -1033,15 +1014,12 @@ static noinline int cow_file_range(struct inode *inode,
 
 	trans = btrfs_join_transaction(root);
 	if (IS_ERR(trans)) {
-		extent_clear_unlock_delalloc(inode,
-			     &BTRFS_I(inode)->io_tree,
-			     start, end, locked_page,
-			     EXTENT_CLEAR_UNLOCK_PAGE |
-			     EXTENT_CLEAR_UNLOCK |
-			     EXTENT_CLEAR_DELALLOC |
-			     EXTENT_CLEAR_DIRTY |
-			     EXTENT_SET_WRITEBACK |
-			     EXTENT_END_WRITEBACK);
+		extent_clear_unlock_delalloc(inode, start, end, locked_page,
+					     EXTENT_LOCKED | EXTENT_DELALLOC |
+					     EXTENT_DIRTY, PAGE_UNLOCK |
+					     PAGE_CLEAR_DIRTY |
+					     PAGE_SET_WRITEBACK |
+					     PAGE_END_WRITEBACK);
 		return PTR_ERR(trans);
 	}
 	trans->block_rsv = &root->fs_info->delalloc_block_rsv;
@@ -1221,15 +1199,12 @@ static noinline int run_delalloc_nocow(struct inode *inode,
 
 	path = btrfs_alloc_path();
 	if (!path) {
-		extent_clear_unlock_delalloc(inode,
-			     &BTRFS_I(inode)->io_tree,
-			     start, end, locked_page,
-			     EXTENT_CLEAR_UNLOCK_PAGE |
-			     EXTENT_CLEAR_UNLOCK |
-			     EXTENT_CLEAR_DELALLOC |
-			     EXTENT_CLEAR_DIRTY |
-			     EXTENT_SET_WRITEBACK |
-			     EXTENT_END_WRITEBACK);
+		extent_clear_unlock_delalloc(inode, start, end, locked_page,
+					     EXTENT_LOCKED | EXTENT_DELALLOC |
+					     EXTENT_DIRTY, PAGE_UNLOCK |
+					     PAGE_CLEAR_DIRTY |
+					     PAGE_SET_WRITEBACK |
+					     PAGE_END_WRITEBACK);
 		return -ENOMEM;
 	}
 
@@ -1241,15 +1216,12 @@ static noinline int run_delalloc_nocow(struct inode *inode,
 		trans = btrfs_join_transaction(root);
 
 	if (IS_ERR(trans)) {
-		extent_clear_unlock_delalloc(inode,
-			     &BTRFS_I(inode)->io_tree,
-			     start, end, locked_page,
-			     EXTENT_CLEAR_UNLOCK_PAGE |
-			     EXTENT_CLEAR_UNLOCK |
-			     EXTENT_CLEAR_DELALLOC |
-			     EXTENT_CLEAR_DIRTY |
-			     EXTENT_SET_WRITEBACK |
-			     EXTENT_END_WRITEBACK);
+		extent_clear_unlock_delalloc(inode, start, end, locked_page,
+					     EXTENT_LOCKED | EXTENT_DELALLOC |
+					     EXTENT_DIRTY, PAGE_UNLOCK |
+					     PAGE_CLEAR_DIRTY |
+					     PAGE_SET_WRITEBACK |
+					     PAGE_END_WRITEBACK);
 		btrfs_free_path(path);
 		return PTR_ERR(trans);
 	}
@@ -1428,11 +1400,11 @@ out_check:
 			}
 		}
 
-		extent_clear_unlock_delalloc(inode, &BTRFS_I(inode)->io_tree,
-				cur_offset, cur_offset + num_bytes - 1,
-				locked_page, EXTENT_CLEAR_UNLOCK_PAGE |
-				EXTENT_CLEAR_UNLOCK | EXTENT_CLEAR_DELALLOC |
-				EXTENT_SET_PRIVATE2);
+		extent_clear_unlock_delalloc(inode, cur_offset,
+					     cur_offset + num_bytes - 1,
+					     locked_page, EXTENT_LOCKED |
+					     EXTENT_DELALLOC, PAGE_UNLOCK |
+					     PAGE_SET_PRIVATE2);
 		cur_offset = extent_end;
 		if (cur_offset > end)
 			break;
@@ -1460,16 +1432,12 @@ error:
 		ret = err;
 
 	if (ret && cur_offset < end)
-		extent_clear_unlock_delalloc(inode,
-			     &BTRFS_I(inode)->io_tree,
-			     cur_offset, end, locked_page,
-			     EXTENT_CLEAR_UNLOCK_PAGE |
-			     EXTENT_CLEAR_UNLOCK |
-			     EXTENT_CLEAR_DELALLOC |
-			     EXTENT_CLEAR_DIRTY |
-			     EXTENT_SET_WRITEBACK |
-			     EXTENT_END_WRITEBACK);
-
+		extent_clear_unlock_delalloc(inode, cur_offset, end,
+					     locked_page, EXTENT_LOCKED |
+					     EXTENT_DELALLOC | EXTENT_DIRTY,
+					     PAGE_UNLOCK | PAGE_CLEAR_DIRTY |
+					     PAGE_SET_WRITEBACK |
+					     PAGE_END_WRITEBACK);
 	btrfs_free_path(path);
 	return ret;
 }