If a qgroup that has still assignments is deleted by the user, the corresponding
relations are left in the tree. This leads to an unmountable filesystem.
With this patch, those relations are simple ignored.
Reported-by: NEric Hopper <hopper@omnifarious.org>
Signed-off-by: NArne Jansen <sensille@gmx.net>
Signed-off-by: NChris Mason <chris.mason@fusionio.com>

We should free quota_root before returning from the error
handling code.
Signed-off-by: NTsutomu Itoh <t-itoh@jp.fujitsu.com>

ulist_alloc() has the possibility of returning NULL.
So, it is necessary to check the return value.
Signed-off-by: NTsutomu Itoh <t-itoh@jp.fujitsu.com>

Signed-off-by: NJan Schmidt <list.btrfs@jan-o-sch.net>
Signed-off-by: NChris Mason <chris.mason@fusionio.com>

Btrfs send/receive uses the aux field to store inode numbers. On
32 bit machines this may become a problem.

Also fix all users of ulist_add and ulist_add_merged.
Reported-by: NArne Jansen <sensille@gmx.net>
Signed-off-by: NAlexander Block <ablock84@googlemail.com>

This reverts commit 5986802c.

Both paths are not error paths but regular cases where non-qgroup
subvols are involved.
Signed-off-by: NChris Mason <chris.mason@fusionio.com>

add_qgroup_rb() never returns NULL, only error pointers.
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>

These are returning zero when it should be returning a negative error
code.
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>

Signed-off-by: NArne Jansen <sensille@gmx.net>
Signed-off-by: NJan Schmidt <list.btrfs@jan-o-sch.net>