From 1340876f8e8d8fdd3abc13f5d3bd8ff42fe70b9f Mon Sep 17 00:00:00 2001
From: Miao Xie <miaox@cn.fujitsu.com>
Date: Thu, 10 Nov 2011 20:45:04 -0500
Subject: [PATCH] --- yaml --- r: 275323 b: refs/heads/master c:
 ba38eb4de354d228f2792f93cde2c748a3a3f3b2 h: refs/heads/master i:   275321:
 2691584ab8b6c6b60348d686ad44be4dcf2e00ae   275319:
 7dd998b841ff0490978b27d8f8eeccce0cd5bb1a v: v3

---
 [refs]                     |  2 +-
 trunk/fs/btrfs/inode-map.c | 28 ++++++++++++++++++++++++----
 2 files changed, 25 insertions(+), 5 deletions(-)

diff --git a/[refs] b/[refs]
index 9702ed3f799b..d8dec169df7c 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 924cd8fbe41851eda2b68bf2ed501b2777fd77b4
+refs/heads/master: ba38eb4de354d228f2792f93cde2c748a3a3f3b2
diff --git a/trunk/fs/btrfs/inode-map.c b/trunk/fs/btrfs/inode-map.c
index 53dcbdf446cd..f8962a957d65 100644
--- a/trunk/fs/btrfs/inode-map.c
+++ b/trunk/fs/btrfs/inode-map.c
@@ -398,6 +398,8 @@ int btrfs_save_ino_cache(struct btrfs_root *root,
 	struct btrfs_free_space_ctl *ctl = root->free_ino_ctl;
 	struct btrfs_path *path;
 	struct inode *inode;
+	struct btrfs_block_rsv *rsv;
+	u64 num_bytes;
 	u64 alloc_hint = 0;
 	int ret;
 	int prealloc;
@@ -421,11 +423,26 @@ int btrfs_save_ino_cache(struct btrfs_root *root,
 	if (!path)
 		return -ENOMEM;
 
+	rsv = trans->block_rsv;
+	trans->block_rsv = &root->fs_info->trans_block_rsv;
+
+	num_bytes = trans->bytes_reserved;
+	/*
+	 * 1 item for inode item insertion if need
+	 * 3 items for inode item update (in the worst case)
+	 * 1 item for free space object
+	 * 3 items for pre-allocation
+	 */
+	trans->bytes_reserved = btrfs_calc_trans_metadata_size(root, 8);
+	ret = btrfs_block_rsv_add_noflush(root, trans->block_rsv,
+					  trans->bytes_reserved);
+	if (ret)
+		goto out;
 again:
 	inode = lookup_free_ino_inode(root, path);
 	if (IS_ERR(inode) && PTR_ERR(inode) != -ENOENT) {
 		ret = PTR_ERR(inode);
-		goto out;
+		goto out_release;
 	}
 
 	if (IS_ERR(inode)) {
@@ -434,7 +451,7 @@ int btrfs_save_ino_cache(struct btrfs_root *root,
 
 		ret = create_free_ino_inode(root, trans, path);
 		if (ret)
-			goto out;
+			goto out_release;
 		goto again;
 	}
 
@@ -477,11 +494,14 @@ int btrfs_save_ino_cache(struct btrfs_root *root,
 	}
 	btrfs_free_reserved_data_space(inode, prealloc);
 
+	ret = btrfs_write_out_ino_cache(root, trans, path);
 out_put:
 	iput(inode);
+out_release:
+	btrfs_block_rsv_release(root, trans->block_rsv, trans->bytes_reserved);
 out:
-	if (ret == 0)
-		ret = btrfs_write_out_ino_cache(root, trans, path);
+	trans->block_rsv = rsv;
+	trans->bytes_reserved = num_bytes;
 
 	btrfs_free_path(path);
 	return ret;