Btrfs devel - Nov 2013 - [BUG] btrfs-progs: btrfs send does not work inside mounted non root subvolume

When operating from inside a mounted btrfs subvolume which is not the
root subvolume "btrfs send" exits with the error:
ERROR: open <subvolume path> failed. No such file or directory

Steps to reproduce:
     1. mkfs.btrfs /dev/sda1
     2. mount /dev/sda1 /mnt
     3. btrfs subvolume create /mnt/foo
     4. umount /mnt
     5. mount -o subvol=foo /dev/sda1 /mnt
     6. btrfs subvolume snapshot -r /mnt /mnt/snap
     7. btrfs send /mnt/snap > /dev/null
-> ERROR: open foo/snap failed. No such file or directory



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Hello Thomas,

2013/11/29 Thomas Scheiblauer <tom@sharkbay.at>:
> When operating from inside a mounted btrfs subvolume which is not the
> root subvolume "btrfs send" exits with the error:
> ERROR: open <subvolume path> failed. No such file or directory
>
> Steps to reproduce:
>      1. mkfs.btrfs /dev/sda1
>      2. mount /dev/sda1 /mnt
>      3. btrfs subvolume create /mnt/foo
>      4. umount /mnt
>      5. mount -o subvol=foo /dev/sda1 /mnt
>      6. btrfs subvolume snapshot -r /mnt /mnt/snap
>      7. btrfs send /mnt/snap > /dev/null
> -> ERROR: open foo/snap failed. No such file or directory
The problem is that we will try to use btrfs internal path(foo/snap)
to open the sub-volume, this is not right here, i will send a patch for this,
thanks for reporting.

Thanks,
Wang
>
>
>
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