Re: [PATCH v7 0/7] Add O_DENY* support for VFS and CIFS/NFS

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



2014/1/20 Volker Lendecke <Volker.Lendecke@xxxxxxxxx>:
> Hi!
>
> On Fri, Jan 17, 2014 at 02:07:05PM +0400, Pavel Shilovsky wrote:
>> If O_DENYDELETE flag is specified and the open succeded,
>> any further unlink operation will fail with -ESHAREDENIED
>> untill this open is closed. Now this flag is processed by
>> VFS and CIFS filesystem. NFS returns -EINVAL for opens
>> with this flag.
>
> This looks really, really good, thanks!
>
> One question: If Samba wants to open a file for delete
> access, there's no corresponding flag in the open
> permissions. There can be the case where Samba wants to open
> *just* for future unlink, no read or write access required.
> Is there a way to achieve this atomically correct?

You can try to use O_PATH flag. It doesn't give you a delete access
but should be ok because further deleting will be done without file
descriptor -- through unlink syscall.

-- 
Best regards,
Pavel Shilovsky.
--
To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html




[Index of Archives]     [Linux Ext4 Filesystem]     [Union Filesystem]     [Filesystem Testing]     [Ceph Users]     [Ecryptfs]     [AutoFS]     [Kernel Newbies]     [Share Photos]     [Security]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux Cachefs]     [Reiser Filesystem]     [Linux RAID]     [Samba]     [Device Mapper]     [CEPH Development]
  Powered by Linux