Btrfs: add a flags field to btrfs_fs_info

We have a lot of random ints in btrfs_fs_info that can be put into flags.  This
is mostly equivalent with the exception of how we deal with quota going on or
off, now instead we set a flag when we are turning it on or off and deal with
that appropriately, rather than just having a pending state that the current
quota_enabled gets set to.  Thanks,

Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/btrfs_inode.h

@@ -44,17 +44,6 @@
 #define BTRFS_INODE_IN_DELALLOC_LIST		9
 #define BTRFS_INODE_READDIO_NEED_LOCK		10
 #define BTRFS_INODE_HAS_PROPS		        11
-/*
- * The following 3 bits are meant only for the btree inode.
- * When any of them is set, it means an error happened while writing an
- * extent buffer belonging to:
- * 1) a non-log btree
- * 2) a log btree and first log sub-transaction
- * 3) a log btree and second log sub-transaction
- */
-#define BTRFS_INODE_BTREE_ERR		        12
-#define BTRFS_INODE_BTREE_LOG1_ERR		13
-#define BTRFS_INODE_BTREE_LOG2_ERR		14
 
 /* in memory btrfs inode */
 struct btrfs_inode {

fs/btrfs/ctree.h

@@ -677,9 +677,25 @@ struct btrfs_device;
 struct btrfs_fs_devices;
 struct btrfs_balance_control;
 struct btrfs_delayed_root;
+
+#define BTRFS_FS_BARRIER			1
+#define BTRFS_FS_CLOSING_START			2
+#define BTRFS_FS_CLOSING_DONE			3
+#define BTRFS_FS_LOG_RECOVERING			4
+#define BTRFS_FS_OPEN				5
+#define BTRFS_FS_QUOTA_ENABLED			6
+#define BTRFS_FS_QUOTA_ENABLING			7
+#define BTRFS_FS_QUOTA_DISABLING		8
+#define BTRFS_FS_UPDATE_UUID_TREE_GEN		9
+#define BTRFS_FS_CREATING_FREE_SPACE_TREE	10
+#define BTRFS_FS_BTREE_ERR			11
+#define BTRFS_FS_LOG1_ERR			12
+#define BTRFS_FS_LOG2_ERR			13
+
 struct btrfs_fs_info {
 	u8 fsid[BTRFS_FSID_SIZE];
 	u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
+	unsigned long flags;
 	struct btrfs_root *extent_root;
 	struct btrfs_root *tree_root;
 	struct btrfs_root *chunk_root;
@@ -908,10 +924,6 @@ struct btrfs_fs_info {
 	int thread_pool_size;
 
 	struct kobject *space_info_kobj;
-	int do_barriers;
-	int closing;
-	int log_root_recovering;
-	int open;
 
 	u64 total_pinned;
 
@@ -988,17 +1000,6 @@ struct btrfs_fs_info {
 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
 	u32 check_integrity_print_mask;
 #endif
-	/*
-	 * quota information
-	 */
-	unsigned int quota_enabled:1;
-
-	/*
-	 * quota_enabled only changes state after a commit. This holds the
-	 * next state.
-	 */
-	unsigned int pending_quota_state:1;
-
 	/* is qgroup tracking in a consistent state? */
 	u64 qgroup_flags;
 
@@ -1062,7 +1063,6 @@ struct btrfs_fs_info {
 	wait_queue_head_t replace_wait;
 
 	struct semaphore uuid_tree_rescan_sem;
-	unsigned int update_uuid_tree_gen:1;
 
 	/* Used to reclaim the metadata space in the background. */
 	struct work_struct async_reclaim_work;
@@ -1081,7 +1081,6 @@ struct btrfs_fs_info {
 	 */
 	struct list_head pinned_chunks;
 
-	int creating_free_space_tree;
 	/* Used to record internally whether fs has been frozen */
 	int fs_frozen;
 };
@@ -2868,10 +2867,14 @@ int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
 {
 	/*
-	 * Get synced with close_ctree()
+	 * Do it this way so we only ever do one test_bit in the normal case.
 	 */
-	smp_mb();
-	return fs_info->closing;
+	if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) {
+		if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags))
+			return 2;
+		return 1;
+	}
+	return 0;
 }
 
 /*

fs/btrfs/delayed-inode.c

@@ -1874,7 +1874,8 @@ int btrfs_delayed_delete_inode_ref(struct inode *inode)
 	 * leads to enospc problems.  This means we also can't do
 	 * delayed inode refs
 	 */
-	if (BTRFS_I(inode)->root->fs_info->log_root_recovering)
+	if (test_bit(BTRFS_FS_LOG_RECOVERING,
+		     &BTRFS_I(inode)->root->fs_info->flags))
 		return -EAGAIN;
 
 	delayed_node = btrfs_get_or_create_delayed_node(inode);

fs/btrfs/delayed-ref.c

@@ -770,7 +770,8 @@ int btrfs_add_delayed_tree_ref(struct btrfs_fs_info *fs_info,
 	if (!head_ref)
 		goto free_ref;
 
-	if (fs_info->quota_enabled && is_fstree(ref_root)) {
+	if (test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags) &&
+	    is_fstree(ref_root)) {
 		record = kmalloc(sizeof(*record), GFP_NOFS);
 		if (!record)
 			goto free_head_ref;
@@ -828,7 +829,8 @@ int btrfs_add_delayed_data_ref(struct btrfs_fs_info *fs_info,
 		return -ENOMEM;
 	}
 
-	if (fs_info->quota_enabled && is_fstree(ref_root)) {
+	if (test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags) &&
+	    is_fstree(ref_root)) {
 		record = kmalloc(sizeof(*record), GFP_NOFS);
 		if (!record) {
 			kmem_cache_free(btrfs_delayed_data_ref_cachep, ref);

fs/btrfs/disk-io.c

@@ -1839,7 +1839,7 @@ static int cleaner_kthread(void *arg)
 		 * Do not do anything if we might cause open_ctree() to block
 		 * before we have finished mounting the filesystem.
 		 */
-		if (!root->fs_info->open)
+		if (!test_bit(BTRFS_FS_OPEN, &root->fs_info->flags))
 			goto sleep;
 
 		if (!mutex_trylock(&root->fs_info->cleaner_mutex))
@@ -2332,8 +2332,6 @@ static void btrfs_init_qgroup(struct btrfs_fs_info *fs_info)
 	fs_info->qgroup_op_tree = RB_ROOT;
 	INIT_LIST_HEAD(&fs_info->dirty_qgroups);
 	fs_info->qgroup_seq = 1;
-	fs_info->quota_enabled = 0;
-	fs_info->pending_quota_state = 0;
 	fs_info->qgroup_ulist = NULL;
 	fs_info->qgroup_rescan_running = false;
 	mutex_init(&fs_info->qgroup_rescan_lock);
@@ -2518,8 +2516,7 @@ static int btrfs_read_roots(struct btrfs_fs_info *fs_info,
 	root = btrfs_read_tree_root(tree_root, &location);
 	if (!IS_ERR(root)) {
 		set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state);
-		fs_info->quota_enabled = 1;
-		fs_info->pending_quota_state = 1;
+		set_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags);
 		fs_info->quota_root = root;
 	}
 
@@ -2710,8 +2707,7 @@ int open_ctree(struct super_block *sb,
 	extent_io_tree_init(&fs_info->freed_extents[1],
 			     fs_info->btree_inode->i_mapping);
 	fs_info->pinned_extents = &fs_info->freed_extents[0];
-	fs_info->do_barriers = 1;
-
+	set_bit(BTRFS_FS_BARRIER, &fs_info->flags);
 
 	mutex_init(&fs_info->ordered_operations_mutex);
 	mutex_init(&fs_info->tree_log_mutex);
@@ -3199,10 +3195,9 @@ retry_root_backup:
 			return ret;
 		}
 	} else {
-		fs_info->update_uuid_tree_gen = 1;
+		set_bit(BTRFS_FS_UPDATE_UUID_TREE_GEN, &fs_info->flags);
 	}
-
-	fs_info->open = 1;
+	set_bit(BTRFS_FS_OPEN, &fs_info->flags);
 
 	/*
 	 * backuproot only affect mount behavior, and if open_ctree succeeded,
@@ -3893,8 +3888,7 @@ void close_ctree(struct btrfs_root *root)
 	struct btrfs_fs_info *fs_info = root->fs_info;
 	int ret;
 
-	fs_info->closing = 1;
-	smp_mb();
+	set_bit(BTRFS_FS_CLOSING_START, &fs_info->flags);
 
 	/* wait for the qgroup rescan worker to stop */
 	btrfs_qgroup_wait_for_completion(fs_info, false);
@@ -3939,8 +3933,7 @@ void close_ctree(struct btrfs_root *root)
 	kthread_stop(fs_info->transaction_kthread);
 	kthread_stop(fs_info->cleaner_kthread);
 
-	fs_info->closing = 2;
-	smp_mb();
+	set_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags);
 
 	btrfs_free_qgroup_config(fs_info);
 
@@ -3965,7 +3958,7 @@ void close_ctree(struct btrfs_root *root)
 	invalidate_inode_pages2(fs_info->btree_inode->i_mapping);
 	btrfs_stop_all_workers(fs_info);
 
-	fs_info->open = 0;
+	clear_bit(BTRFS_FS_OPEN, &fs_info->flags);
 	free_root_pointers(fs_info, 1);
 
 	iput(fs_info->btree_inode);

fs/btrfs/extent-tree.c

@@ -2940,7 +2940,7 @@ int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
 	if (trans->aborted)
 		return 0;
 
-	if (root->fs_info->creating_free_space_tree)
+	if (test_bit(BTRFS_FS_CREATING_FREE_SPACE_TREE, &root->fs_info->flags))
 		return 0;
 
 	if (root == root->fs_info->extent_root)
@@ -5188,7 +5188,7 @@ static int __reserve_metadata_bytes(struct btrfs_root *root,
 		 * which means we won't have fs_info->fs_root set, so don't do
 		 * the async reclaim as we will panic.
 		 */
-		if (!root->fs_info->log_root_recovering &&
+		if (!test_bit(BTRFS_FS_LOG_RECOVERING, &root->fs_info->flags) &&
 		    need_do_async_reclaim(space_info, root, used) &&
 		    !work_busy(&root->fs_info->async_reclaim_work)) {
 			trace_btrfs_trigger_flush(root->fs_info,
@@ -5794,7 +5794,7 @@ int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
 	int ret;
 	struct btrfs_block_rsv *global_rsv = &root->fs_info->global_block_rsv;
 
-	if (root->fs_info->quota_enabled) {
+	if (test_bit(BTRFS_FS_QUOTA_ENABLED, &root->fs_info->flags)) {
 		/* One for parent inode, two for dir entries */
 		num_bytes = 3 * root->nodesize;
 		ret = btrfs_qgroup_reserve_meta(root, num_bytes);
@@ -5972,7 +5972,7 @@ int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes)
 	csum_bytes = BTRFS_I(inode)->csum_bytes;
 	spin_unlock(&BTRFS_I(inode)->lock);
 
-	if (root->fs_info->quota_enabled) {
+	if (test_bit(BTRFS_FS_QUOTA_ENABLED, &root->fs_info->flags)) {
 		ret = btrfs_qgroup_reserve_meta(root,
 				nr_extents * root->nodesize);
 		if (ret)
@@ -8544,7 +8544,7 @@ static int account_leaf_items(struct btrfs_trans_handle *trans,
 	u64 bytenr, num_bytes;
 
 	/* We can be called directly from walk_up_proc() */
-	if (!root->fs_info->quota_enabled)
+	if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &root->fs_info->flags))
 		return 0;
 
 	for (i = 0; i < nr; i++) {
@@ -8653,7 +8653,7 @@ static int account_shared_subtree(struct btrfs_trans_handle *trans,
 	BUG_ON(root_level < 0 || root_level > BTRFS_MAX_LEVEL);
 	BUG_ON(root_eb == NULL);
 
-	if (!root->fs_info->quota_enabled)
+	if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &root->fs_info->flags))
 		return 0;
 
 	if (!extent_buffer_uptodate(root_eb)) {
@@ -10803,7 +10803,7 @@ void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info)
 	struct btrfs_trans_handle *trans;
 	int ret = 0;
 
-	if (!fs_info->open)
+	if (!test_bit(BTRFS_FS_OPEN, &fs_info->flags))
 		return;
 
 	spin_lock(&fs_info->unused_bgs_lock);

fs/btrfs/extent_io.c

@@ -3625,7 +3625,6 @@ static void end_extent_buffer_writeback(struct extent_buffer *eb)
 static void set_btree_ioerr(struct page *page)
 {
 	struct extent_buffer *eb = (struct extent_buffer *)page->private;
-	struct btrfs_inode *btree_ino = BTRFS_I(eb->fs_info->btree_inode);
 
 	SetPageError(page);
 	if (test_and_set_bit(EXTENT_BUFFER_WRITE_ERR, &eb->bflags))
@@ -3671,13 +3670,13 @@ static void set_btree_ioerr(struct page *page)
 	 */
 	switch (eb->log_index) {
 	case -1:
-		set_bit(BTRFS_INODE_BTREE_ERR, &btree_ino->runtime_flags);
+		set_bit(BTRFS_FS_BTREE_ERR, &eb->fs_info->flags);
 		break;
 	case 0:
-		set_bit(BTRFS_INODE_BTREE_LOG1_ERR, &btree_ino->runtime_flags);
+		set_bit(BTRFS_FS_LOG1_ERR, &eb->fs_info->flags);
 		break;
 	case 1:
-		set_bit(BTRFS_INODE_BTREE_LOG2_ERR, &btree_ino->runtime_flags);
+		set_bit(BTRFS_FS_LOG2_ERR, &eb->fs_info->flags);
 		break;
 	default:
 		BUG(); /* unexpected, logic error */

fs/btrfs/free-space-tree.c

@@ -1163,7 +1163,7 @@ int btrfs_create_free_space_tree(struct btrfs_fs_info *fs_info)
 	if (IS_ERR(trans))
 		return PTR_ERR(trans);
 
-	fs_info->creating_free_space_tree = 1;
+	set_bit(BTRFS_FS_CREATING_FREE_SPACE_TREE, &fs_info->flags);
 	free_space_root = btrfs_create_tree(trans, fs_info,
 					    BTRFS_FREE_SPACE_TREE_OBJECTID);
 	if (IS_ERR(free_space_root)) {
@@ -1183,7 +1183,7 @@ int btrfs_create_free_space_tree(struct btrfs_fs_info *fs_info)
 	}
 
 	btrfs_set_fs_compat_ro(fs_info, FREE_SPACE_TREE);
-	fs_info->creating_free_space_tree = 0;
+	clear_bit(BTRFS_FS_CREATING_FREE_SPACE_TREE, &fs_info->flags);
 
 	ret = btrfs_commit_transaction(trans, tree_root);
 	if (ret)
@@ -1192,7 +1192,7 @@ int btrfs_create_free_space_tree(struct btrfs_fs_info *fs_info)
 	return 0;
 
 abort:
-	fs_info->creating_free_space_tree = 0;
+	clear_bit(BTRFS_FS_CREATING_FREE_SPACE_TREE, &fs_info->flags);
 	btrfs_abort_transaction(trans, ret);
 	btrfs_end_transaction(trans, tree_root);
 	return ret;

fs/btrfs/inode.c

@@ -3948,7 +3948,7 @@ noinline int btrfs_update_inode(struct btrfs_trans_handle *trans,
 	 */
 	if (!btrfs_is_free_space_inode(inode)
 	    && root->root_key.objectid != BTRFS_DATA_RELOC_TREE_OBJECTID
-	    && !root->fs_info->log_root_recovering) {
+	    && !test_bit(BTRFS_FS_LOG_RECOVERING, &root->fs_info->flags)) {
 		btrfs_update_root_times(trans, root);
 
 		ret = btrfs_delayed_update_inode(trans, root, inode);
@@ -5235,7 +5235,7 @@ void btrfs_evict_inode(struct inode *inode)
 
 	btrfs_free_io_failure_record(inode, 0, (u64)-1);
 
-	if (root->fs_info->log_root_recovering) {
+	if (test_bit(BTRFS_FS_LOG_RECOVERING, &root->fs_info->flags)) {
 		BUG_ON(test_bit(BTRFS_INODE_HAS_ORPHAN_ITEM,
 				 &BTRFS_I(inode)->runtime_flags));
 		goto no_delete;

fs/btrfs/qgroup.c

@@ -309,7 +309,7 @@ int btrfs_read_qgroup_config(struct btrfs_fs_info *fs_info)
 	u64 flags = 0;
 	u64 rescan_progress = 0;
 
-	if (!fs_info->quota_enabled)
+	if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags))
 		return 0;
 
 	fs_info->qgroup_ulist = ulist_alloc(GFP_NOFS);
@@ -463,13 +463,11 @@ next2:
 	}
 out:
 	fs_info->qgroup_flags |= flags;
-	if (!(fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_ON)) {
-		fs_info->quota_enabled = 0;
-		fs_info->pending_quota_state = 0;
-	} else if (fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_RESCAN &&
-		   ret >= 0) {
+	if (!(fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_ON))
+		clear_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags);
+	else if (fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_RESCAN &&
+		 ret >= 0)
 		ret = qgroup_rescan_init(fs_info, rescan_progress, 0);
-	}
 	btrfs_free_path(path);
 
 	if (ret < 0) {
@@ -847,7 +845,7 @@ static int btrfs_clean_quota_tree(struct btrfs_trans_handle *trans,
 	}
 	ret = 0;
 out:
-	root->fs_info->pending_quota_state = 0;
+	set_bit(BTRFS_FS_QUOTA_DISABLING, &root->fs_info->flags);
 	btrfs_free_path(path);
 	return ret;
 }
@@ -868,7 +866,7 @@ int btrfs_quota_enable(struct btrfs_trans_handle *trans,
 
 	mutex_lock(&fs_info->qgroup_ioctl_lock);
 	if (fs_info->quota_root) {
-		fs_info->pending_quota_state = 1;
+		set_bit(BTRFS_FS_QUOTA_ENABLING, &fs_info->flags);
 		goto out;
 	}
 
@@ -964,7 +962,7 @@ out_add_root:
 	}
 	spin_lock(&fs_info->qgroup_lock);
 	fs_info->quota_root = quota_root;
-	fs_info->pending_quota_state = 1;
+	set_bit(BTRFS_FS_QUOTA_ENABLING, &fs_info->flags);
 	spin_unlock(&fs_info->qgroup_lock);
 out_free_path:
 	btrfs_free_path(path);
@@ -993,8 +991,8 @@ int btrfs_quota_disable(struct btrfs_trans_handle *trans,
 	mutex_lock(&fs_info->qgroup_ioctl_lock);
 	if (!fs_info->quota_root)
 		goto out;
-	fs_info->quota_enabled = 0;
-	fs_info->pending_quota_state = 0;
+	clear_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags);
+	set_bit(BTRFS_FS_QUOTA_DISABLING, &fs_info->flags);
 	btrfs_qgroup_wait_for_completion(fs_info, false);
 	spin_lock(&fs_info->qgroup_lock);
 	quota_root = fs_info->quota_root;
@@ -1490,7 +1488,8 @@ int btrfs_qgroup_insert_dirty_extent(struct btrfs_trans_handle *trans,
 	struct btrfs_delayed_ref_root *delayed_refs;
 	int ret;
 
-	if (!fs_info->quota_enabled || bytenr == 0 || num_bytes == 0)
+	if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags)
+	    || bytenr == 0 || num_bytes == 0)
 		return 0;
 	if (WARN_ON(trans == NULL))
 		return -EINVAL;
@@ -1713,7 +1712,7 @@ btrfs_qgroup_account_extent(struct btrfs_trans_handle *trans,
 	if (old_roots)
 		nr_old_roots = old_roots->nnodes;
 
-	if (!fs_info->quota_enabled)
+	if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags))
 		goto out_free;
 	BUG_ON(!fs_info->quota_root);
 
@@ -1833,10 +1832,14 @@ int btrfs_run_qgroups(struct btrfs_trans_handle *trans,
 	if (!quota_root)
 		goto out;
 
-	if (!fs_info->quota_enabled && fs_info->pending_quota_state)
+	if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags) &&
+	    test_bit(BTRFS_FS_QUOTA_ENABLING, &fs_info->flags))
 		start_rescan_worker = 1;
 
-	fs_info->quota_enabled = fs_info->pending_quota_state;
+	if (test_and_clear_bit(BTRFS_FS_QUOTA_ENABLING, &fs_info->flags))
+		set_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags);
+	if (test_and_clear_bit(BTRFS_FS_QUOTA_DISABLING, &fs_info->flags))
+		clear_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags);
 
 	spin_lock(&fs_info->qgroup_lock);
 	while (!list_empty(&fs_info->dirty_qgroups)) {
@@ -1855,7 +1858,7 @@ int btrfs_run_qgroups(struct btrfs_trans_handle *trans,
 					BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT;
 		spin_lock(&fs_info->qgroup_lock);
 	}
-	if (fs_info->quota_enabled)
+	if (test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags))
 		fs_info->qgroup_flags |= BTRFS_QGROUP_STATUS_FLAG_ON;
 	else
 		fs_info->qgroup_flags &= ~BTRFS_QGROUP_STATUS_FLAG_ON;
@@ -1900,7 +1903,7 @@ int btrfs_qgroup_inherit(struct btrfs_trans_handle *trans,
 	u64 nums;
 
 	mutex_lock(&fs_info->qgroup_ioctl_lock);
-	if (!fs_info->quota_enabled)
+	if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags))
 		goto out;
 
 	if (!quota_root) {
@@ -2347,7 +2350,7 @@ static void btrfs_qgroup_rescan_worker(struct btrfs_work *work)
 			err = PTR_ERR(trans);
 			break;
 		}
-		if (!fs_info->quota_enabled) {
+		if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags)) {
 			err = -EINTR;
 		} else {
 			err = qgroup_rescan_leaf(fs_info, path, trans);
@@ -2578,8 +2581,8 @@ int btrfs_qgroup_reserve_data(struct inode *inode, u64 start, u64 len)
 	struct ulist_iterator uiter;
 	int ret;
 
-	if (!root->fs_info->quota_enabled || !is_fstree(root->objectid) ||
-	    len == 0)
+	if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &root->fs_info->flags) ||
+	    !is_fstree(root->objectid) || len == 0)
 		return 0;
 
 	changeset.bytes_changed = 0;
@@ -2676,8 +2679,8 @@ int btrfs_qgroup_reserve_meta(struct btrfs_root *root, int num_bytes)
 {
 	int ret;
 
-	if (!root->fs_info->quota_enabled || !is_fstree(root->objectid) ||
-	    num_bytes == 0)
+	if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &root->fs_info->flags) ||
+	    !is_fstree(root->objectid) || num_bytes == 0)
 		return 0;
 
 	BUG_ON(num_bytes != round_down(num_bytes, root->nodesize));
@@ -2692,7 +2695,8 @@ void btrfs_qgroup_free_meta_all(struct btrfs_root *root)
 {
 	int reserved;
 
-	if (!root->fs_info->quota_enabled || !is_fstree(root->objectid))
+	if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &root->fs_info->flags) ||
+	    !is_fstree(root->objectid))
 		return;
 
 	reserved = atomic_xchg(&root->qgroup_meta_rsv, 0);
@@ -2703,7 +2707,8 @@ void btrfs_qgroup_free_meta_all(struct btrfs_root *root)
 
 void btrfs_qgroup_free_meta(struct btrfs_root *root, int num_bytes)
 {
-	if (!root->fs_info->quota_enabled || !is_fstree(root->objectid))
+	if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &root->fs_info->flags) ||
+	    !is_fstree(root->objectid))
 		return;
 
 	BUG_ON(num_bytes != round_down(num_bytes, root->nodesize));

fs/btrfs/relocation.c

@@ -3952,7 +3952,7 @@ static int qgroup_fix_relocated_data_extents(struct btrfs_trans_handle *trans,
 	struct btrfs_key key;
 	int ret = 0;
 
-	if (!fs_info->quota_enabled)
+	if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags))
 		return 0;
 
 	/*

fs/btrfs/super.c

@@ -1836,7 +1836,7 @@ static int btrfs_remount(struct super_block *sb, int *flags, char *data)
 		}
 		sb->s_flags &= ~MS_RDONLY;
 
-		fs_info->open = 1;
+		set_bit(BTRFS_FS_OPEN, &fs_info->flags);
 	}
 out:
 	wake_up_process(fs_info->transaction_kthread);

fs/btrfs/tests/qgroup-tests.c

@@ -480,7 +480,7 @@ int btrfs_test_qgroups(u32 sectorsize, u32 nodesize)
 	 */
 	root->fs_info->tree_root = root;
 	root->fs_info->quota_root = root;
-	root->fs_info->quota_enabled = 1;
+	set_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags);
 
 	/*
 	 * Can't use bytenr 0, some things freak out

fs/btrfs/transaction.c

@@ -441,7 +441,7 @@ static void wait_current_trans(struct btrfs_root *root)
 
 static int may_wait_transaction(struct btrfs_root *root, int type)
 {
-	if (root->fs_info->log_root_recovering)
+	if (test_bit(BTRFS_FS_LOG_RECOVERING, &root->fs_info->flags))
 		return 0;
 
 	if (type == TRANS_USERSPACE)
@@ -993,7 +993,6 @@ int btrfs_wait_marked_extents(struct btrfs_root *root,
 	struct extent_state *cached_state = NULL;
 	u64 start = 0;
 	u64 end;
-	struct btrfs_inode *btree_ino = BTRFS_I(root->fs_info->btree_inode);
 	bool errors = false;
 
 	while (!find_first_extent_bit(dirty_pages, start, &start, &end,
@@ -1025,17 +1024,17 @@ int btrfs_wait_marked_extents(struct btrfs_root *root,
 
 	if (root->root_key.objectid == BTRFS_TREE_LOG_OBJECTID) {
 		if ((mark & EXTENT_DIRTY) &&
-		    test_and_clear_bit(BTRFS_INODE_BTREE_LOG1_ERR,
-				       &btree_ino->runtime_flags))
+		    test_and_clear_bit(BTRFS_FS_LOG1_ERR,
+				       &root->fs_info->flags))
 			errors = true;
 
 		if ((mark & EXTENT_NEW) &&
-		    test_and_clear_bit(BTRFS_INODE_BTREE_LOG2_ERR,
-				       &btree_ino->runtime_flags))
+		    test_and_clear_bit(BTRFS_FS_LOG2_ERR,
+				       &root->fs_info->flags))
 			errors = true;
 	} else {
-		if (test_and_clear_bit(BTRFS_INODE_BTREE_ERR,
-				       &btree_ino->runtime_flags))
+		if (test_and_clear_bit(BTRFS_FS_BTREE_ERR,
+				       &root->fs_info->flags))
 			errors = true;
 	}
 
@@ -1335,7 +1334,7 @@ static int qgroup_account_snapshot(struct btrfs_trans_handle *trans,
 	 * kick in anyway.
 	 */
 	mutex_lock(&fs_info->qgroup_ioctl_lock);
-	if (!fs_info->quota_enabled) {
+	if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags)) {
 		mutex_unlock(&fs_info->qgroup_ioctl_lock);
 		return 0;
 	}
@@ -1712,7 +1711,7 @@ static void update_super_roots(struct btrfs_root *root)
 	super->root_level = root_item->level;
 	if (btrfs_test_opt(root->fs_info, SPACE_CACHE))
 		super->cache_generation = root_item->generation;
-	if (root->fs_info->update_uuid_tree_gen)
+	if (test_bit(BTRFS_FS_UPDATE_UUID_TREE_GEN, &root->fs_info->flags))
 		super->uuid_tree_generation = root_item->generation;
 }
 
@@ -1919,7 +1918,6 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
 {
 	struct btrfs_transaction *cur_trans = trans->transaction;
 	struct btrfs_transaction *prev_trans = NULL;
-	struct btrfs_inode *btree_ino = BTRFS_I(root->fs_info->btree_inode);
 	int ret;
 
 	/* Stop the commit early if ->aborted is set */
@@ -2213,8 +2211,8 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
 	btrfs_update_commit_device_size(root->fs_info);
 	btrfs_update_commit_device_bytes_used(root, cur_trans);
 
-	clear_bit(BTRFS_INODE_BTREE_LOG1_ERR, &btree_ino->runtime_flags);
-	clear_bit(BTRFS_INODE_BTREE_LOG2_ERR, &btree_ino->runtime_flags);
+	clear_bit(BTRFS_FS_LOG1_ERR, &root->fs_info->flags);
+	clear_bit(BTRFS_FS_LOG2_ERR, &root->fs_info->flags);
 
 	btrfs_trans_release_chunk_metadata(trans);
 

fs/btrfs/tree-log.c

@@ -5579,7 +5579,7 @@ int btrfs_recover_log_trees(struct btrfs_root *log_root_tree)
 	if (!path)
 		return -ENOMEM;
 
-	fs_info->log_root_recovering = 1;
+	set_bit(BTRFS_FS_LOG_RECOVERING, &fs_info->flags);
 
 	trans = btrfs_start_transaction(fs_info->tree_root, 0);
 	if (IS_ERR(trans)) {
@@ -5689,7 +5689,7 @@ again:
 
 	free_extent_buffer(log_root_tree->node);
 	log_root_tree->log_root = NULL;
-	fs_info->log_root_recovering = 0;
+	clear_bit(BTRFS_FS_LOG_RECOVERING, &fs_info->flags);
 	kfree(log_root_tree);
 
 	return 0;

fs/btrfs/volumes.c

@@ -4217,7 +4217,7 @@ out:
 	if (ret)
 		btrfs_warn(fs_info, "btrfs_uuid_scan_kthread failed %d", ret);
 	else
-		fs_info->update_uuid_tree_gen = 1;
+		set_bit(BTRFS_FS_UPDATE_UUID_TREE_GEN, &fs_info->flags);
 	up(&fs_info->uuid_tree_rescan_sem);
 	return 0;
 }