From 594a24eb0e7fa8413f8b443863be4b7c72bfde9f Mon Sep 17 00:00:00 2001
From: Chris Mason <chris.mason@oracle.com>
Date: Wed, 25 Jun 2008 16:01:30 -0400
Subject: [PATCH] Fix btrfs_del_ordered_inode to allow forcing the drop during
 unlinks

This allows us to delete an unlinked inode with dirty pages from the list
instead of forcing commit to write these out before deleting the inode.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
---
 fs/btrfs/ctree.c        | 18 +++++++++++++-----
 fs/btrfs/file.c         |  2 +-
 fs/btrfs/inode.c        |  4 +---
 fs/btrfs/ordered-data.c |  6 +++---
 fs/btrfs/ordered-data.h |  2 +-
 5 files changed, 19 insertions(+), 13 deletions(-)

diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index 1b756fae27993..9601241e552b0 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -1245,7 +1245,10 @@ int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
 	int level;
 	int should_reada = p->reada;
 	int lowest_unlock = 1;
+	int blocksize;
 	u8 lowest_level = 0;
+	u64 blocknr;
+	u64 gen;
 
 	lowest_level = p->lowest_level;
 	WARN_ON(lowest_level && ins_len);
@@ -1320,11 +1323,12 @@ int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
 				reada_for_search(root, p, level, slot,
 						 key->objectid);
 
-			tmp = btrfs_find_tree_block(root,
-					  btrfs_node_blockptr(b, slot),
-					  btrfs_level_size(root, level - 1));
-			if (tmp && btrfs_buffer_uptodate(tmp,
-				   btrfs_node_ptr_generation(b, slot))) {
+			blocknr = btrfs_node_blockptr(b, slot);
+			gen = btrfs_node_ptr_generation(b, slot);
+			blocksize = btrfs_level_size(root, level - 1);
+
+			tmp = btrfs_find_tree_block(root, blocknr, blocksize);
+			if (tmp && btrfs_buffer_uptodate(tmp, gen)) {
 				b = tmp;
 			} else {
 				/*
@@ -1334,6 +1338,10 @@ int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
 				 */
 				if (level > 1) {
 					btrfs_release_path(NULL, p);
+					if (tmp)
+						free_extent_buffer(tmp);
+					tmp = read_tree_block(root, blocknr,
+							 blocksize, gen);
 					if (tmp)
 						free_extent_buffer(tmp);
 					goto again;
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 18bbe108a0e60..b7f8f92daf8a5 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -976,7 +976,7 @@ static ssize_t btrfs_file_write(struct file *file, const char __user *buf,
 
 int btrfs_release_file(struct inode * inode, struct file * filp)
 {
-	btrfs_del_ordered_inode(inode);
+	btrfs_del_ordered_inode(inode, 0);
 	if (filp->private_data)
 		btrfs_ioctl_trans_end(filp);
 	return 0;
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index b2251e27ac84c..cf27b5984627f 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -852,7 +852,7 @@ static int btrfs_unlink(struct inode *dir, struct dentry *dentry)
 		 * we don't need to worry about
 		 * data=ordered
 		 */
-		btrfs_del_ordered_inode(inode);
+		btrfs_del_ordered_inode(inode, 1);
 	}
 
 	btrfs_end_transaction(trans, root);
@@ -1276,14 +1276,12 @@ void btrfs_delete_inode(struct inode *inode)
 
 	btrfs_end_transaction(trans, root);
 	btrfs_btree_balance_dirty(root, nr);
-	btrfs_throttle(root);
 	return;
 
 no_delete_lock:
 	nr = trans->blocks_used;
 	btrfs_end_transaction(trans, root);
 	btrfs_btree_balance_dirty(root, nr);
-	btrfs_throttle(root);
 no_delete:
 	clear_inode(inode);
 }
diff --git a/fs/btrfs/ordered-data.c b/fs/btrfs/ordered-data.c
index 8dd8180183ff0..5e4c0d95ce432 100644
--- a/fs/btrfs/ordered-data.c
+++ b/fs/btrfs/ordered-data.c
@@ -254,7 +254,7 @@ static void __btrfs_del_ordered_inode(struct btrfs_ordered_inode_tree *tree,
 	return;
 }
 
-void btrfs_del_ordered_inode(struct inode *inode)
+void btrfs_del_ordered_inode(struct inode *inode, int force)
 {
 	struct btrfs_root *root = BTRFS_I(inode)->root;
 	u64 root_objectid = root->root_key.objectid;
@@ -263,8 +263,8 @@ void btrfs_del_ordered_inode(struct inode *inode)
 		return;
 	}
 
-	if (mapping_tagged(inode->i_mapping, PAGECACHE_TAG_DIRTY) ||
-	    mapping_tagged(inode->i_mapping, PAGECACHE_TAG_WRITEBACK))
+	if (!force && (mapping_tagged(inode->i_mapping, PAGECACHE_TAG_DIRTY) ||
+	    mapping_tagged(inode->i_mapping, PAGECACHE_TAG_WRITEBACK)))
 		return;
 
 	spin_lock(&root->fs_info->new_trans_lock);
diff --git a/fs/btrfs/ordered-data.h b/fs/btrfs/ordered-data.h
index c515c4b399960..4fa78736423e2 100644
--- a/fs/btrfs/ordered-data.h
+++ b/fs/btrfs/ordered-data.h
@@ -38,6 +38,6 @@ int btrfs_find_del_first_ordered_inode(struct btrfs_ordered_inode_tree *tree,
 int btrfs_find_first_ordered_inode(struct btrfs_ordered_inode_tree *tree,
 				       u64 *root_objectid, u64 *objectid,
 				       struct inode **inode);
-void btrfs_del_ordered_inode(struct inode *inode);
+void btrfs_del_ordered_inode(struct inode *inode, int force);
 int btrfs_ordered_throttle(struct btrfs_root *root, struct inode *inode);
 #endif