From c4a816c67c396b1a06abf77bd249ac6ad02861b3 Mon Sep 17 00:00:00 2001 From: Naohiro Aota Date: Tue, 25 Feb 2020 12:56:08 +0900 Subject: [PATCH] btrfs: introduce chunk allocation policy Introduce chunk allocation policy for btrfs. This policy controls how chunks and device extents are allocated from devices. Reviewed-by: Johannes Thumshirn Reviewed-by: Josef Bacik Signed-off-by: Naohiro Aota Reviewed-by: David Sterba Signed-off-by: David Sterba --- 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 f1c98b0..e4a2d96 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -1205,6 +1205,7 @@ 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 7b657f2..f067b59 100644 --- a/fs/btrfs/volumes.h +++ b/fs/btrfs/volumes.h @@ -207,6 +207,10 @@ 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]; @@ -258,6 +262,8 @@ struct btrfs_fs_devices { struct kobject *devices_kobj; struct kobject *devinfo_kobj; struct completion kobj_unregister; + + enum btrfs_chunk_allocation_policy chunk_alloc_policy; }; #define BTRFS_BIO_INLINE_CSUM_SIZE 64 -- 2.7.4