This commit introduces chunk allocation policy for btrfs. This policy
controls how btrfs allocate a chunk and device extents from devices.
There is no functional change introduced with this commit.
Signed-off-by: Naohiro Aota <naohiro.aota@xxxxxxx>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@xxxxxxx>
Reviewed-by: Josef Bacik <josef@xxxxxxxxxxxxxx>
---
fs/btrfs/volumes.c | 1 +
fs/btrfs/volumes.h | 6 ++++++
2 files changed, 7 insertions(+)
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 911c6b7c650b..9fcbed9b57f9 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -1209,6 +1209,7 @@ static int open_fs_devices(struct btrfs_fs_devices *fs_devices,
fs_devices->opened = 1;
fs_devices->latest_bdev = latest_dev->bdev;
fs_devices->total_rw_bytes = 0;
+ fs_devices->chunk_alloc_policy = BTRFS_CHUNK_ALLOC_REGULAR;
out:
return ret;
}
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index 690d4f5a0653..f07e1c4240b9 100644
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -209,6 +209,10 @@ BTRFS_DEVICE_GETSET_FUNCS(total_bytes);
BTRFS_DEVICE_GETSET_FUNCS(disk_total_bytes);
BTRFS_DEVICE_GETSET_FUNCS(bytes_used);
+enum btrfs_chunk_allocation_policy {
+ BTRFS_CHUNK_ALLOC_REGULAR,
+};
+
struct btrfs_fs_devices {
u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
u8 metadata_uuid[BTRFS_FSID_SIZE];
@@ -259,6 +263,8 @@ struct btrfs_fs_devices {
struct kobject fsid_kobj;
struct kobject *devices_kobj;
struct completion kobj_unregister;
+
+ enum btrfs_chunk_allocation_policy chunk_alloc_policy;
};
#define BTRFS_BIO_INLINE_CSUM_SIZE 64
--
2.25.0
