Properly align the hole size in btrfs_setattr

Signed-off-by: Chris Mason <chris.mason@oracle.com>

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index de17c61..515f8b0 100644 (file)
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -1001,7 +1001,7 @@ static int btrfs_setattr(struct dentry *dentry, struct iattr *attr)
 
                u64 mask = root->sectorsize - 1;
                u64 pos = (inode->i_size + mask) & ~mask;
-               u64 block_end = attr->ia_size | mask;
+               u64 block_end = (attr->ia_size + mask) & ~mask;
                u64 hole_start;
                u64 hole_size;
                u64 alloc_hint = 0;
@@ -1022,7 +1022,7 @@ static int btrfs_setattr(struct dentry *dentry, struct iattr *attr)
 
                btrfs_truncate_page(inode->i_mapping, inode->i_size);
 
-               lock_extent(io_tree, pos, block_end, GFP_NOFS);
+               lock_extent(io_tree, pos, block_end - 1, GFP_NOFS);
                hole_size = block_end - hole_start;
 
                mutex_lock(&root->fs_info->fs_mutex);
@@ -1043,7 +1043,7 @@ static int btrfs_setattr(struct dentry *dentry, struct iattr *attr)
                }
                btrfs_end_transaction(trans, root);
                mutex_unlock(&root->fs_info->fs_mutex);
-               unlock_extent(io_tree, pos, block_end, GFP_NOFS);
+               unlock_extent(io_tree, pos, block_end - 1, GFP_NOFS);
                if (err)
                        return err;
        }