Btrfs: fix enospc problems with delalloc

[pandora-kernel.git] / fs / btrfs / inode.c

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 2bf4d2b..55d68ea 100644 (file)
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -1298,7 +1298,9 @@ static int btrfs_split_extent_hook(struct inode *inode,
        if (!(orig->state & EXTENT_DELALLOC))
                return 0;
 
-       atomic_inc(&BTRFS_I(inode)->outstanding_extents);
+       spin_lock(&BTRFS_I(inode)->lock);
+       BTRFS_I(inode)->outstanding_extents++;
+       spin_unlock(&BTRFS_I(inode)->lock);
        return 0;
 }
 
@@ -1316,7 +1318,9 @@ static int btrfs_merge_extent_hook(struct inode *inode,
        if (!(other->state & EXTENT_DELALLOC))
                return 0;
 
-       atomic_dec(&BTRFS_I(inode)->outstanding_extents);
+       spin_lock(&BTRFS_I(inode)->lock);
+       BTRFS_I(inode)->outstanding_extents--;
+       spin_unlock(&BTRFS_I(inode)->lock);
        return 0;
 }
 
@@ -1339,10 +1343,13 @@ static int btrfs_set_bit_hook(struct inode *inode,
                u64 len = state->end + 1 - state->start;
                bool do_list = !is_free_space_inode(root, inode);
 
-               if (*bits & EXTENT_FIRST_DELALLOC)
+               if (*bits & EXTENT_FIRST_DELALLOC) {
                        *bits &= ~EXTENT_FIRST_DELALLOC;
-               else
-                       atomic_inc(&BTRFS_I(inode)->outstanding_extents);
+               } else {
+                       spin_lock(&BTRFS_I(inode)->lock);
+                       BTRFS_I(inode)->outstanding_extents++;
+                       spin_unlock(&BTRFS_I(inode)->lock);
+               }
 
                spin_lock(&root->fs_info->delalloc_lock);
                BTRFS_I(inode)->delalloc_bytes += len;
@@ -1372,10 +1379,13 @@ static int btrfs_clear_bit_hook(struct inode *inode,
                u64 len = state->end + 1 - state->start;
                bool do_list = !is_free_space_inode(root, inode);
 
-               if (*bits & EXTENT_FIRST_DELALLOC)
+               if (*bits & EXTENT_FIRST_DELALLOC) {
                        *bits &= ~EXTENT_FIRST_DELALLOC;
-               else if (!(*bits & EXTENT_DO_ACCOUNTING))
-                       atomic_dec(&BTRFS_I(inode)->outstanding_extents);
+               } else if (!(*bits & EXTENT_DO_ACCOUNTING)) {
+                       spin_lock(&BTRFS_I(inode)->lock);
+                       BTRFS_I(inode)->outstanding_extents--;
+                       spin_unlock(&BTRFS_I(inode)->lock);
+               }
 
                if (*bits & EXTENT_DO_ACCOUNTING)
                        btrfs_delalloc_release_metadata(inode, len);
@@ -6735,8 +6745,9 @@ struct inode *btrfs_alloc_inode(struct super_block *sb)
        ei->index_cnt = (u64)-1;
        ei->last_unlink_trans = 0;
 
-       atomic_set(&ei->outstanding_extents, 0);
-       atomic_set(&ei->reserved_extents, 0);
+       spin_lock_init(&ei->lock);
+       ei->outstanding_extents = 0;
+       ei->reserved_extents = 0;
 
        ei->ordered_data_close = 0;
        ei->orphan_meta_reserved = 0;
@@ -6774,8 +6785,8 @@ void btrfs_destroy_inode(struct inode *inode)
 
        WARN_ON(!list_empty(&inode->i_dentry));
        WARN_ON(inode->i_data.nrpages);
-       WARN_ON(atomic_read(&BTRFS_I(inode)->outstanding_extents));
-       WARN_ON(atomic_read(&BTRFS_I(inode)->reserved_extents));
+       WARN_ON(BTRFS_I(inode)->outstanding_extents);
+       WARN_ON(BTRFS_I(inode)->reserved_extents);
 
        /*
         * This can happen where we create an inode, but somebody else also