[Bug 1774794] Re: btrfs-convert executable is not included in btrfs-progs

[kkm]

FWIW, it looks like btrfs-convert is being dropped upstream. I just
compiled mine from source, and it crashed after some heavy churning. The
package description should be changed though (it explicitly mentions
btrfs-convert). Here's a relevant thread:

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=854489

referring to the note in
https://btrfs.wiki.kernel.org/index.php/Conversion_from_Ext3:

“Warning: As of 4.0 kernels this feature is not often used or well
tested anymore, and there have been some reports that the conversion
doesn't work reliably. Feel free to try it out, but make sure you have
backups.”

My backtrace was different, but also related to btrfs_reserve_extent().
I also attempted ext4 -> btrfs. I'll post the BT but it's hardly
helpful:

# btrfs-convert /dev/sdc1
create btrfs filesystem:
        blocksize: 4096
        nodesize:  16384
        features:  extref, skinny-metadata (default)
creating ext2 image file
Unable to find block group for 0
Unable to find block group for 0
Unable to find block group for 0
extent-tree.c:2764: alloc_tree_block: BUG_ON `ret` triggered, value -28
btrfs-convert(+0x1c4f6)[0x558cfb6c54f6]
btrfs-convert(btrfs_alloc_free_block+0x1ff)[0x558cfb6cabaf]
btrfs-convert(+0x14d63)[0x558cfb6bdd63]
btrfs-convert(btrfs_search_slot+0x2af)[0x558cfb6bec8f]
btrfs-convert(btrfs_csum_file_block+0x48f)[0x558cfb6d0c1f]
btrfs-convert(+0xd944)[0x558cfb6b6944]
btrfs-convert(main+0x19d1)[0x558cfb6b5df1]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xe7)[0x7f75d48fcb97]
btrfs-convert(_start+0x2a)[0x558cfb6b64da]
Aborted


** Bug watch added: Debian Bug tracker #854489
   https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=854489

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https://bugs.launchpad.net/bugs/1774794

Title:
  btrfs-convert executable is not included in btrfs-progs

Status in btrfs-progs package in Ubuntu:
  Confirmed

Bug description:
  The current version (btrfs-progs_4.15.1-1build1_amd64.deb) of the
  package btrfs-progs does not include the btrfs-convert tool. However
  the man page for btrfs-convert is included.

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