On Sun, Jun 26, 2011 at 09:36:54PM +0100, Hugo Mills wrote:
> diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
> index 828aa34..fb11550 100644
> --- a/fs/btrfs/volumes.c
> +++ b/fs/btrfs/volumes.c
> @@ -117,6 +117,52 @@ static void requeue_list(struct btrfs_pending_bios *pending_bios,
> pending_bios->tail = tail;
> }
>
> +void btrfs_get_replication_info(struct btrfs_replication_info *info,
> + u64 type)
> +{
> + info->sub_stripes = 1;
> + info->dev_stripes = 1;
> + info->devs_increment = 1;
> + info->num_copies = 1;
> + info->devs_max = 0; /* 0 == as many as possible */
> + info->devs_min = 1;
> +
> + if (type & BTRFS_BLOCK_GROUP_DUP) {
> + info->dev_stripes = 2;
> + info->num_copies = 2;
> + info->devs_max = 1;
> + } else if (type & BTRFS_BLOCK_GROUP_RAID0) {
> + info->devs_min = 2;
> + } else if (type & BTRFS_BLOCK_GROUP_RAID1) {
> + info->devs_increment = 2;
> + info->num_copies = 2;
> + info->devs_max = 2;
> + info->devs_min = 2;
> + } else if (type & BTRFS_BLOCK_GROUP_RAID10) {
> + info->sub_stripes = 2;
> + info->devs_increment = 2;
> + info->num_copies = 2;
> + info->devs_min = 4;
> + }
> +
> + if (type & BTRFS_BLOCK_GROUP_DATA) {
> + info->max_stripe_size = 1024 * 1024 * 1024;
> + info->min_stripe_size = 64 * 1024 * 1024;
> + info->max_chunk_size = 10 * info->max_stripe_size;
> + } else if (type & BTRFS_BLOCK_GROUP_METADATA) {
> + info->max_stripe_size = 256 * 1024 * 1024;
> + info->min_stripe_size = 32 * 1024 * 1024;
> + info->max_chunk_size = info->max_stripe_size;
> + } else if (type & BTRFS_BLOCK_GROUP_SYSTEM) {
> + info->max_stripe_size = 8 * 1024 * 1024;
> + info->min_stripe_size = 1 * 1024 * 1024;
> + info->max_chunk_size = 2 * info->max_stripe_size;
> + } else {
> + printk(KERN_ERR "Block group is of an unknown usage type: not data, metadata or system.\n");
> + BUG_ON(1);
I'm hitting this BUG_ON with 'btrfs device delete', type = 24 which is
BTRFS_BLOCK_GROUP_RAID0 + BTRFS_BLOCK_GROUP_RAID1 .
in btrfs_rm_device:
1277 all_avail = root->fs_info->avail_data_alloc_bits |
1278 root->fs_info->avail_system_alloc_bits |
1279 root->fs_info->avail_metadata_alloc_bits;
the values before the call are:
[ 105.107074] D: all_avail 24
[ 105.111844] D: root->fs_info->avail_data_alloc_bits 8
[ 105.118858] D: root->fs_info->avail_system_alloc_bits 16
[ 105.126110] D: root->fs_info->avail_metadata_alloc_bits 16
there are 5 devices, sdb5 - sdb9, i'm removing sdb9, after clean
mount.
david
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