Merge branch 'for-4.13-part3' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux

Pull btrfs fixes from David Sterba:
 "Fixes addressing problems reported by users, and there's one more
  regression fix"

* 'for-4.13-part3' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
  btrfs: round down size diff when shrinking/growing device
  Btrfs: fix early ENOSPC due to delalloc
  btrfs: fix lockup in find_free_extent with read-only block groups
  Btrfs: fix dir item validation when replaying xattr deletes

Author: torvalds

fs/btrfs/extent-tree.c

@@ -4825,10 +4825,6 @@ static void shrink_delalloc(struct btrfs_fs_info *fs_info, u64 to_reclaim,
 		else
 			flush = BTRFS_RESERVE_NO_FLUSH;
 		spin_lock(&space_info->lock);
-		if (can_overcommit(fs_info, space_info, orig, flush, false)) {
-			spin_unlock(&space_info->lock);
-			break;
-		}
 		if (list_empty(&space_info->tickets) &&
 		    list_empty(&space_info->priority_tickets)) {
 			spin_unlock(&space_info->lock);
@@ -7589,6 +7585,10 @@ static noinline int find_free_extent(struct btrfs_fs_info *fs_info,
 		u64 offset;
 		int cached;
 
+		/* If the block group is read-only, we can skip it entirely. */
+		if (unlikely(block_group->ro))
+			continue;
+
 		btrfs_grab_block_group(block_group, delalloc);
 		search_start = block_group->key.objectid;
 
@@ -7624,8 +7624,6 @@ static noinline int find_free_extent(struct btrfs_fs_info *fs_info,
 
 		if (unlikely(block_group->cached == BTRFS_CACHE_ERROR))
 			goto loop;
-		if (unlikely(block_group->ro))
-			goto loop;
 
 		/*
 		 * Ok we want to try and use the cluster allocator, so
@@ -7839,6 +7837,7 @@ static noinline int find_free_extent(struct btrfs_fs_info *fs_info,
 		failed_alloc = false;
 		BUG_ON(index != get_block_group_index(block_group));
 		btrfs_release_block_group(block_group, delalloc);
+		cond_resched();
 	}
 	up_read(&space_info->groups_sem);
 

fs/btrfs/tree-log.c

@@ -2153,8 +2153,7 @@ static int replay_xattr_deletes(struct btrfs_trans_handle *trans,
 			u32 this_len = sizeof(*di) + name_len + data_len;
 			char *name;
 
-			ret = verify_dir_item(fs_info, path->nodes[0],
-					      path->slots[0], di);
+			ret = verify_dir_item(fs_info, path->nodes[0], i, di);
 			if (ret) {
 				ret = -EIO;
 				goto out;

fs/btrfs/volumes.c

@@ -2702,7 +2702,7 @@ int btrfs_grow_device(struct btrfs_trans_handle *trans,
 
 	mutex_lock(&fs_info->chunk_mutex);
 	old_total = btrfs_super_total_bytes(super_copy);
-	diff = new_size - device->total_bytes;
+	diff = round_down(new_size - device->total_bytes, fs_info->sectorsize);
 
 	if (new_size <= device->total_bytes ||
 	    device->is_tgtdev_for_dev_replace) {
@@ -4406,7 +4406,7 @@ int btrfs_shrink_device(struct btrfs_device *device, u64 new_size)
 	u64 diff;
 
 	new_size = round_down(new_size, fs_info->sectorsize);
-	diff = old_size - new_size;
+	diff = round_down(old_size - new_size, fs_info->sectorsize);
 
 	if (device->is_tgtdev_for_dev_replace)
 		return -EINVAL;