btrfs: cleanup device states define BTRFS_DEV_STATE_IN_FS_METADATA

Currently device state is being managed by each individual int
variable such as struct btrfs_device::in_fs_metadata. Instead of
that declare device state BTRFS_DEV_STATE_IN_FS_METADATA and use
the bit operations.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
[ whitespace adjustments ]
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/disk-io.c

@@ -3393,7 +3393,7 @@ static int barrier_all_devices(struct btrfs_fs_info *info)
 			continue;
 		if (!dev->bdev)
 			continue;
-		if (!dev->in_fs_metadata ||
+		if (!test_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &dev->dev_state) ||
 		    !test_bit(BTRFS_DEV_STATE_WRITEABLE, &dev->dev_state))
 			continue;
 
@@ -3409,7 +3409,7 @@ static int barrier_all_devices(struct btrfs_fs_info *info)
 			errors_wait++;
 			continue;
 		}
-		if (!dev->in_fs_metadata ||
+		if (!test_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &dev->dev_state) ||
 		    !test_bit(BTRFS_DEV_STATE_WRITEABLE, &dev->dev_state))
 			continue;
 
@@ -3507,7 +3507,7 @@ int write_all_supers(struct btrfs_fs_info *fs_info, int max_mirrors)
 			total_errors++;
 			continue;
 		}
-		if (!dev->in_fs_metadata ||
+		if (!test_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &dev->dev_state) ||
 		    !test_bit(BTRFS_DEV_STATE_WRITEABLE, &dev->dev_state))
 			continue;
 
@@ -3547,7 +3547,7 @@ int write_all_supers(struct btrfs_fs_info *fs_info, int max_mirrors)
 	list_for_each_entry(dev, head, dev_list) {
 		if (!dev->bdev)
 			continue;
-		if (!dev->in_fs_metadata ||
+		if (!test_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &dev->dev_state) ||
 		    !test_bit(BTRFS_DEV_STATE_WRITEABLE, &dev->dev_state))
 			continue;
 

fs/btrfs/scrub.c

@@ -4129,7 +4129,8 @@ int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
 	}
 
 	mutex_lock(&fs_info->scrub_lock);
-	if (!dev->in_fs_metadata || dev->is_tgtdev_for_dev_replace) {
+	if (!test_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &dev->dev_state) ||
+	    dev->is_tgtdev_for_dev_replace) {
 		mutex_unlock(&fs_info->scrub_lock);
 		mutex_unlock(&fs_info->fs_devices->device_list_mutex);
 		return -EIO;

fs/btrfs/super.c

@@ -1972,8 +1972,9 @@ static int btrfs_calc_avail_data_space(struct btrfs_fs_info *fs_info,
 
 	rcu_read_lock();
 	list_for_each_entry_rcu(device, &fs_devices->devices, dev_list) {
-		if (!device->in_fs_metadata || !device->bdev ||
-		    device->is_tgtdev_for_dev_replace)
+		if (!test_bit(BTRFS_DEV_STATE_IN_FS_METADATA,
+						&device->dev_state) ||
+		    !device->bdev || device->is_tgtdev_for_dev_replace)
 			continue;
 
 		if (i >= nr_devices)

fs/btrfs/volumes.c

@@ -705,7 +705,7 @@ static int btrfs_open_one_device(struct btrfs_fs_devices *fs_devices,
 		fs_devices->rotating = 1;
 
 	device->bdev = bdev;
-	device->in_fs_metadata = 0;
+	clear_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &device->dev_state);
 	device->mode = flags;
 
 	fs_devices->open_devices++;
@@ -909,7 +909,8 @@ void btrfs_close_extra_devices(struct btrfs_fs_devices *fs_devices, int step)
 again:
 	/* This is the initialized path, it is safe to release the devices. */
 	list_for_each_entry_safe(device, next, &fs_devices->devices, dev_list) {
-		if (device->in_fs_metadata) {
+		if (test_bit(BTRFS_DEV_STATE_IN_FS_METADATA,
+							&device->dev_state)) {
 			if (!device->is_tgtdev_for_dev_replace &&
 			    (!latest_dev ||
 			     device->generation > latest_dev->generation)) {
@@ -1634,7 +1635,7 @@ static int btrfs_alloc_dev_extent(struct btrfs_trans_handle *trans,
 	struct extent_buffer *leaf;
 	struct btrfs_key key;
 
-	WARN_ON(!device->in_fs_metadata);
+	WARN_ON(!test_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &device->dev_state));
 	WARN_ON(device->is_tgtdev_for_dev_replace);
 	path = btrfs_alloc_path();
 	if (!path)
@@ -1975,7 +1976,7 @@ int btrfs_rm_device(struct btrfs_fs_info *fs_info, const char *device_path,
 	if (ret)
 		goto error_undo;
 
-	device->in_fs_metadata = 0;
+	clear_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &device->dev_state);
 	btrfs_scrub_cancel_dev(fs_info, device);
 
 	/*
@@ -2195,7 +2196,8 @@ int btrfs_find_device_missing_or_by_path(struct btrfs_fs_info *fs_info,
 		 * is held by the caller.
 		 */
 		list_for_each_entry(tmp, devices, dev_list) {
-			if (tmp->in_fs_metadata && !tmp->bdev) {
+			if (test_bit(BTRFS_DEV_STATE_IN_FS_METADATA,
+					&tmp->dev_state) && !tmp->bdev) {
 				*device = tmp;
 				break;
 			}
@@ -2447,7 +2449,7 @@ int btrfs_init_new_device(struct btrfs_fs_info *fs_info, const char *device_path
 	device->commit_total_bytes = device->total_bytes;
 	device->fs_info = fs_info;
 	device->bdev = bdev;
-	device->in_fs_metadata = 1;
+	set_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &device->dev_state);
 	device->is_tgtdev_for_dev_replace = 0;
 	device->mode = FMODE_EXCL;
 	device->dev_stats_valid = 1;
@@ -2656,7 +2658,7 @@ int btrfs_init_dev_replace_tgtdev(struct btrfs_fs_info *fs_info,
 	device->commit_bytes_used = device->bytes_used;
 	device->fs_info = fs_info;
 	device->bdev = bdev;
-	device->in_fs_metadata = 1;
+	set_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &device->dev_state);
 	device->is_tgtdev_for_dev_replace = 1;
 	device->mode = FMODE_EXCL;
 	device->dev_stats_valid = 1;
@@ -2685,7 +2687,7 @@ void btrfs_init_dev_replace_tgtdev_for_resume(struct btrfs_fs_info *fs_info,
 	tgtdev->io_align = sectorsize;
 	tgtdev->sector_size = sectorsize;
 	tgtdev->fs_info = fs_info;
-	tgtdev->in_fs_metadata = 1;
+	set_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &tgtdev->dev_state);
 }
 
 static noinline int btrfs_update_device(struct btrfs_trans_handle *trans,
@@ -4737,8 +4739,9 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
 			continue;
 		}
 
-		if (!device->in_fs_metadata ||
-		    device->is_tgtdev_for_dev_replace)
+		if (!test_bit(BTRFS_DEV_STATE_IN_FS_METADATA,
+					&device->dev_state) ||
+		     device->is_tgtdev_for_dev_replace)
 			continue;
 
 		if (device->total_bytes > device->bytes_used)
@@ -6529,7 +6532,9 @@ static int read_one_chunk(struct btrfs_fs_info *fs_info, struct btrfs_key *key,
 			}
 			btrfs_report_missing_device(fs_info, devid, uuid, false);
 		}
-		map->stripes[i].dev->in_fs_metadata = 1;
+		set_bit(BTRFS_DEV_STATE_IN_FS_METADATA,
+				&(map->stripes[i].dev->dev_state));
+
 	}
 
 	write_lock(&map_tree->map_tree.lock);
@@ -6704,7 +6709,7 @@ static int read_one_dev(struct btrfs_fs_info *fs_info,
 	}
 
 	fill_device_from_item(leaf, dev_item, device);
-	device->in_fs_metadata = 1;
+	set_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &device->dev_state);
 	if (test_bit(BTRFS_DEV_STATE_WRITEABLE, &device->dev_state) &&
 	    !device->is_tgtdev_for_dev_replace) {
 		device->fs_devices->total_rw_bytes += device->total_bytes;

fs/btrfs/volumes.h

@@ -48,6 +48,7 @@ struct btrfs_pending_bios {
 #endif
 
 #define BTRFS_DEV_STATE_WRITEABLE	(0)
+#define BTRFS_DEV_STATE_IN_FS_METADATA	(1)
 
 struct btrfs_device {
 	struct list_head dev_list;
@@ -72,7 +73,6 @@ struct btrfs_device {
 	fmode_t mode;
 
 	unsigned long dev_state;
-	int in_fs_metadata;
 	int missing;
 	int is_tgtdev_for_dev_replace;
 	blk_status_t last_flush_error;