Re: [PATCH] ext4: Add support for SFITRIM, an ioctl for secure FITRIM.

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

 



On Tue, Jun 17, 2014 at 01:55:26PM +0200, Lukáš Czerner wrote:
> 
> I definitely agree with Dave here it is an ugly API hack. Fallocate
> seems much more suitable for this.
> 
> New flag FALLOC_FL_ISSUE_DISCARD which would work with
> FALLOC_FL_PUNCH_HOLE, FALLOC_FL_ZERO_RANGE and possibly
> FALLOC_FL_COLLAPSE_RANGE might actually be useful.

I agree it would be useful to have an FL_ISSUE_DISCARD (and while
we're at it, FL_ISSUE_SECDISCARD) as an fallocate flag.  That doesn't
obviate the usefulness of a BLKDISCARD ioctl for ext4 files, though.

Something else that might be useful, and perhaps more appropriate for
the Android use case, is to add a SECDISCARD flag to the unlinkat(2)
system call.  That way, people who want to do a "discard and then
unlink" don't have to be forced to do an open(2), fallocate(2),
close(2), and only *then* the unlink(2) system call.

Cheers,

						- Ted
--
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