Unlike kernel, btrfs-progs doesn't (yet) support devices grow/shrink,
the port only needs to handle open_ctree() time initialization (at
read_one_dev()), and btrfs_add_device() used for mkfs.
This provide the basis for incoming unification of chunk allocator
behavior.
Signed-off-by: Qu Wenruo <wqu@xxxxxxxx>
---
volumes.c | 3 +++
volumes.h | 3 +++
2 files changed, 6 insertions(+)
diff --git a/volumes.c b/volumes.c
index 2c6aaf42c5fb..2611a932c01c 100644
--- a/volumes.c
+++ b/volumes.c
@@ -744,6 +744,7 @@ int btrfs_add_device(struct btrfs_trans_handle *trans,
write_extent_buffer(leaf, fs_info->fs_devices->metadata_uuid, ptr,
BTRFS_UUID_SIZE);
btrfs_mark_buffer_dirty(leaf);
+ fs_info->fs_devices->total_rw_bytes += device->total_bytes;
ret = 0;
out:
@@ -2060,6 +2061,8 @@ static int read_one_dev(struct btrfs_fs_info *fs_info,
fill_device_from_item(leaf, dev_item, device);
device->dev_root = fs_info->dev_root;
+ fs_info->fs_devices->total_rw_bytes +=
+ btrfs_device_total_bytes(leaf, dev_item);
return ret;
}
diff --git a/volumes.h b/volumes.h
index e30bcef7dba5..dbe9d3dea647 100644
--- a/volumes.h
+++ b/volumes.h
@@ -77,6 +77,9 @@ struct btrfs_fs_devices {
u64 latest_devid;
u64 latest_trans;
u64 lowest_devid;
+
+ u64 total_rw_bytes;
+
int latest_bdev;
int lowest_bdev;
struct list_head devices;
--
2.20.1
