Re: [PATCH RESEND] implement uid and gid mount options for ext2,ext3 and ext4

From: Boaz Harrosh
Date: Sun May 13 2012 - 07:53:03 EST

On 05/11/2012 10:22 PM, Ted Ts'o wrote:

> On Fri, May 11, 2012 at 08:18:35PM +0300, Boaz Harrosh wrote:
>> How is that ext* special? You said "Unix systems" there are lots more
>> FSs more common to "Unix" systems
> Well, because FreeBSD, NetBSD, and Hurd do support ext2/3*. So if you
> want a file system which is higher performance than VFAT, and
> supported on Unix-like systems beyond Linux, ext* is the best choice
> in a number of cases.

That was a rhetorical questions. I meant ext* is not special. There
are plenty of other FFs that are common to unix systems.

> As far as NTFS is concerned, the *BSD's can only support NTFS via
> FUSE, and I've been suspicious about the quality of our ntfs support
> under Linux --- we don't have a full-featured fsck for it, for
> example. I'm at least not comfortable using NTFS on my personal
> machines. (Last I checked there were all sorts of asterisks about
> data corruption if the system crashed before Linux mounted it, since
> apparently NTFS's logging subsystem was never reverse-engineered.)

No! on all modern Linux distro's ntfs (ntfs-3g) is supported with
that infamous FUSE driver. The Kernel driver is long dead. The same
FUSE driver is also used under *BSD and officially supported by
Apple in OSX. Last benchmarks I saw where Faster then ext2 and in-par
with ext3, MetaData faster, IO slower then ext3. Stability is very
good and I never had an issue, on any of the above systems.

There is also a very good fsck and a suit of other tools under the same
ntfs-3g project. To date I have fixed 10s of friends/family Windows
machines with a Linux rescue USB-stick, I mean machines that would even

>> As a maintainer of ext4 filesystem which is the official system for
>> Linux in many distrows, still. Please resists any such crap.
>> User "convenience-vs-security was never a geol of Unix.
> Did you look at the proposal I made? By making it something where the
> file system is explicitly marked as "for interchange", it avoids the
> security problem (as much as you can when you put your unencrypted
> data on removable, portable storage which could be lost or stolen).
> Sure, if you don't need to operate on the data as a mounted file
> system, tar or cpio or zip is a good choice for maximal portability.
> But if you want to do something like rsync on a portable SSD,

Again, for the last time, you are the maintainer, you do what you
understand, I hope Linus or someone can make it more clear than me.

There is nothing special about USB sticks and ext* filesystems it
is the same old "shared files" problem. If you are not under a single
NIS domain, then these are different users. If files need to be shared
they need to sit in the proper CHMODed directory and bits.

I have at home a bittorent network directory for the all family, So the
first time I set it up I had to ssh into the server and fix the permissions.
That was easy enough listen to learn.

For the last time and I'm off this for good:
"Shared files" problem is not solved by mount options.

Been there done that

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