> This is what I'd expect if the volume has only had a mkfs done and
> then mounted and umounted. No files. What do you get for
>
> btrfs ins dump-s -fa /dev/mapper/think--big-home
(attached)
Also tried btrfs check -b /dev/mapper/think--big-home, but that errored:
# btrfs check -b /dev/mapper/think--big-home
volumes.c:1588: btrfs_chunk_readonly: Assertion `!ce` failed.
btrfs(+0x50940)[0x56351dc8f940]
btrfs(+0x50967)[0x56351dc8f967]
btrfs(btrfs_chunk_readonly+0x5a)[0x56351dc91c93]
btrfs(btrfs_read_block_groups+0x1dc)[0x56351dc8749b]
btrfs(btrfs_setup_all_roots+0x33b)[0x56351dc82adc]
btrfs(+0x43ed8)[0x56351dc82ed8]
btrfs(open_ctree_fs_info+0xd5)[0x56351dc82ffd]
btrfs(cmd_check+0x457)[0x56351dc6c332]
btrfs(main+0x139)[0x56351dc4efab]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf1)[0x7efee8d6d3f1]
btrfs(_start+0x2a)[0x56351dc4efea]
So, you reckon going back to an older version of btrfs-progs might be
worth a shot then?
superblock: bytenr=65536, device=/dev/mapper/think--big-home
---------------------------------------------------------
csum_type 0 (crc32c)
csum_size 4
csum 0xa64b343b [match]
bytenr 65536
flags 0x1
( WRITTEN )
magic _BHRfS_M [match]
fsid 7f1ce0ed-5986-43ae-b0dd-727eee19fd08
label
generation 593818
root 138821632
sys_array_size 226
chunk_root_generation 593818
root_level 0
chunk_root 21020672
chunk_root_level 0
log_root 0
log_root_transid 0
log_root_level 0
total_bytes 254007050240
bytes_used 655360
sectorsize 4096
nodesize 16384
leafsize 16384
stripesize 4096
root_dir 6
num_devices 1
compat_flags 0x0
compat_ro_flags 0x0
incompat_flags 0x69
( MIXED_BACKREF |
COMPRESS_LZO |
BIG_METADATA |
EXTENDED_IREF )
cache_generation 593818
uuid_tree_generation 593818
dev_item.uuid 59b96438-be86-4397-a842-1e1c6efd7479
dev_item.fsid 7f1ce0ed-5986-43ae-b0dd-727eee19fd08 [match]
dev_item.type 0
dev_item.total_bytes 254007050240
dev_item.bytes_used 182066348032
dev_item.io_align 4096
dev_item.io_width 4096
dev_item.sector_size 4096
dev_item.devid 1
dev_item.dev_group 0
dev_item.seek_speed 0
dev_item.bandwidth 0
dev_item.generation 0
sys_chunk_array[2048]:
item 0 key (FIRST_CHUNK_TREE CHUNK_ITEM 0)
chunk length 4194304 owner 2 stripe_len 65536
type SYSTEM num_stripes 1
stripe 0 devid 1 offset 0
dev uuid: 59b96438-be86-4397-a842-1e1c6efd7479
item 1 key (FIRST_CHUNK_TREE CHUNK_ITEM 20971520)
chunk length 8388608 owner 2 stripe_len 65536
type SYSTEM|DUP num_stripes 2
stripe 0 devid 1 offset 20971520
dev uuid: 59b96438-be86-4397-a842-1e1c6efd7479
stripe 1 devid 1 offset 29360128
dev uuid: 59b96438-be86-4397-a842-1e1c6efd7479
backup_roots[4]:
backup 0:
backup_tree_root: 29360128 gen: 593817 level: 1
backup_chunk_root: 20971520 gen: 591139 level: 1
backup_extent_root: 29376512 gen: 593817 level: 1
backup_fs_root: 132562944 gen: 593815 level: 0
backup_dev_root: 29409280 gen: 593817 level: 0
backup_csum_root: 29491200 gen: 593817 level: 0
backup_total_bytes: 254007050240
backup_bytes_used: 43532288
backup_num_devices: 1
backup 1:
backup_tree_root: 138821632 gen: 593818 level: 0
backup_chunk_root: 21020672 gen: 593818 level: 0
backup_extent_root: 138805248 gen: 593818 level: 0
backup_fs_root: 132562944 gen: 593815 level: 0
backup_dev_root: 132841472 gen: 593818 level: 0
backup_csum_root: 138870784 gen: 593818 level: 0
backup_total_bytes: 254007050240
backup_bytes_used: 655360
backup_num_devices: 1
backup 2:
backup_tree_root: 138788864 gen: 593815 level: 1
backup_chunk_root: 20971520 gen: 591139 level: 1
backup_extent_root: 132841472 gen: 593815 level: 1
backup_fs_root: 132562944 gen: 593815 level: 0
backup_dev_root: 1018118144 gen: 592983 level: 0
backup_csum_root: 134725632 gen: 593815 level: 0
backup_total_bytes: 254007050240
backup_bytes_used: 43532288
backup_num_devices: 1
backup 3:
backup_tree_root: 138870784 gen: 593816 level: 1
backup_chunk_root: 20971520 gen: 591139 level: 1
backup_extent_root: 138887168 gen: 593816 level: 1
backup_fs_root: 132562944 gen: 593815 level: 0
backup_dev_root: 1018118144 gen: 592983 level: 0
backup_csum_root: 138952704 gen: 593816 level: 0
backup_total_bytes: 254007050240
backup_bytes_used: 43532288
backup_num_devices: 1
superblock: bytenr=67108864, device=/dev/mapper/think--big-home
---------------------------------------------------------
csum_type 0 (crc32c)
csum_size 4
csum 0x062a1cf5 [match]
bytenr 67108864
flags 0x1
( WRITTEN )
magic _BHRfS_M [match]
fsid 7f1ce0ed-5986-43ae-b0dd-727eee19fd08
label
generation 593818
root 138821632
sys_array_size 226
chunk_root_generation 593818
root_level 0
chunk_root 21020672
chunk_root_level 0
log_root 0
log_root_transid 0
log_root_level 0
total_bytes 254007050240
bytes_used 655360
sectorsize 4096
nodesize 16384
leafsize 16384
stripesize 4096
root_dir 6
num_devices 1
compat_flags 0x0
compat_ro_flags 0x0
incompat_flags 0x69
( MIXED_BACKREF |
COMPRESS_LZO |
BIG_METADATA |
EXTENDED_IREF )
cache_generation 593818
uuid_tree_generation 593818
dev_item.uuid 59b96438-be86-4397-a842-1e1c6efd7479
dev_item.fsid 7f1ce0ed-5986-43ae-b0dd-727eee19fd08 [match]
dev_item.type 0
dev_item.total_bytes 254007050240
dev_item.bytes_used 182066348032
dev_item.io_align 4096
dev_item.io_width 4096
dev_item.sector_size 4096
dev_item.devid 1
dev_item.dev_group 0
dev_item.seek_speed 0
dev_item.bandwidth 0
dev_item.generation 0
sys_chunk_array[2048]:
item 0 key (FIRST_CHUNK_TREE CHUNK_ITEM 0)
chunk length 4194304 owner 2 stripe_len 65536
type SYSTEM num_stripes 1
stripe 0 devid 1 offset 0
dev uuid: 59b96438-be86-4397-a842-1e1c6efd7479
item 1 key (FIRST_CHUNK_TREE CHUNK_ITEM 20971520)
chunk length 8388608 owner 2 stripe_len 65536
type SYSTEM|DUP num_stripes 2
stripe 0 devid 1 offset 20971520
dev uuid: 59b96438-be86-4397-a842-1e1c6efd7479
stripe 1 devid 1 offset 29360128
dev uuid: 59b96438-be86-4397-a842-1e1c6efd7479
backup_roots[4]:
backup 0:
backup_tree_root: 29360128 gen: 593817 level: 1
backup_chunk_root: 20971520 gen: 591139 level: 1
backup_extent_root: 29376512 gen: 593817 level: 1
backup_fs_root: 132562944 gen: 593815 level: 0
backup_dev_root: 29409280 gen: 593817 level: 0
backup_csum_root: 29491200 gen: 593817 level: 0
backup_total_bytes: 254007050240
backup_bytes_used: 43532288
backup_num_devices: 1
backup 1:
backup_tree_root: 138821632 gen: 593818 level: 0
backup_chunk_root: 21020672 gen: 593818 level: 0
backup_extent_root: 138805248 gen: 593818 level: 0
backup_fs_root: 132562944 gen: 593815 level: 0
backup_dev_root: 132841472 gen: 593818 level: 0
backup_csum_root: 138870784 gen: 593818 level: 0
backup_total_bytes: 254007050240
backup_bytes_used: 655360
backup_num_devices: 1
backup 2:
backup_tree_root: 138788864 gen: 593815 level: 1
backup_chunk_root: 20971520 gen: 591139 level: 1
backup_extent_root: 132841472 gen: 593815 level: 1
backup_fs_root: 132562944 gen: 593815 level: 0
backup_dev_root: 1018118144 gen: 592983 level: 0
backup_csum_root: 134725632 gen: 593815 level: 0
backup_total_bytes: 254007050240
backup_bytes_used: 43532288
backup_num_devices: 1
backup 3:
backup_tree_root: 138870784 gen: 593816 level: 1
backup_chunk_root: 20971520 gen: 591139 level: 1
backup_extent_root: 138887168 gen: 593816 level: 1
backup_fs_root: 132562944 gen: 593815 level: 0
backup_dev_root: 1018118144 gen: 592983 level: 0
backup_csum_root: 138952704 gen: 593816 level: 0
backup_total_bytes: 254007050240
backup_bytes_used: 43532288
backup_num_devices: 1
