rm cannot recursively delete directory on tmpfs on RPi2

[Michal Meloun]

On 07.12.2018 7:25, Mateusz Guzik wrote:
> On 12/7/18, Jia-Shiun Li <jiashiun at gmail.com> wrote:
>> On Fri, Dec 7, 2018 at 12:36 AM Alan Somers <asomers at freebsd.org> wrote:
>>
>>> On Wed, Dec 5, 2018 at 10:18 PM Jia-Shiun Li <jiashiun at gmail.com> wrote:
>>>>
>>>> amd64 and RPi3 do not have this issue.
>>>>
>>>> jsli at rpi2:/home/jsli 13:04 # uname -a
>>>> FreeBSD rpi2 13.0-CURRENT FreeBSD 13.0-CURRENT r341419 GENERIC-NODEBUG
>>> arm
>>>> jsli at rpi2:/home/jsli 13:05 # mount -t tmpfs tmpfs /mnt
>>>> jsli at rpi2:/home/jsli 13:05 # cd /mnt
>>>> jsli at rpi2:/mnt 13:05 # tar xf
>>>> /usr/ports/distfiles/sqlite-autoconf-3260000.tar.gz
>>>> jsli at rpi2:/mnt 13:05 # rm -rf sqlite-autoconf-3260000/
>>>> rm: sqlite-autoconf-3260000/tea: Operation not permitted
>>>> rm: sqlite-autoconf-3260000/: Directory not empty
>>>> jsli at rpi2:/mnt 13:05 #
>>>>
>>>> -Jia-Shiun
>>>
>>> Did you check for file flags?  Do "ls -lod sqlite-autoconf-3260000/tea".
>>>
>>>
>> Unlikely caused by flags I think.
>>
>> jsli at rpi2:/home/jsli # mount -t tmpfs tmpfs /mnt
>> jsli at rpi2:/home/jsli # cd /mnt
>> jsli at rpi2:/mnt # ls -R
>> jsli at rpi2:/mnt # mkdir dir
>> jsli at rpi2:/mnt # ls -R
>> dir/
>> ls: dir: directory causes a cycle
>> jsli at rpi2:/mnt #
>>
>>
>> looks inode no for directories are wrong
>>
>> jsli at rpi2:/mnt # ll -ia
>> total 4
>> 2 drwxr-xr-x   3 root  wheel   36 Dec  7 09:55 ./
>> 2 drwxr-xr-x  23 root  wheel  512 Dec  3 17:04 ../
>> 2 drwxr-xr-x   2 root  wheel    0 Dec  7 09:55 dir/
>> jsli at rpi2:/mnt # ll -ia dir
>> total 0
>> 2 drwxr-xr-x  2 root  wheel   0 Dec  7 09:55 ./
>> 2 drwxr-xr-x  3 root  wheel  36 Dec  7 09:55 ../
>> jsli at rpi2:/mnt #
>>
> 
> Ouch.
> 
> Looks like 64-bit atomic on 32-bit arm don't work as advertised.
> 
> While they should be fixed, I have been meaning to commit the following
> which will have a side effect of taking care of the bug you ran into:
> 

Mateusz,
where you see problem with 64-bit atomic on arm? I'm not aware of any
problem in this area.