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SubjectRe: [PATCH] Ext4: Make file creation time, i_version and i_generation available by xattrs
On Tue, Jun 29, 2010 at 11:44:37PM +0100, David Howells wrote:
> Jeremy Allison <jra@samba.org> wrote:
>
> > We already have code in Samba to detect "birthtime"
> > (st_btime) as a returned member of a stat struct.
>
> Is it, though?
>
> Googling for st_btime suggests it could also be taken as the time last
> archived. That may just be a NetWareism though.

It's a *BSD'ism.

http://www.daemon-systems.org/man/fstat.2.html

#if defined(_NETBSD_SOURCE)
struct timespec st_birthtimespec; /* time of inode creation */
#else
time_t st_birthtime; /* time of inode creation */
long st_birthtimensec; /* nsec of inode creation */
#endif
http://www.unix.com/man-page/FreeBSD/2/stat/

st_birthtime Time when the inode was created.

Of course, for Samba's use we also have to be
able to *write* to st_birthtime as Windows clients
can change this. But that's what the EA is for
(and I'm happy with a system that can only read
st_birthtime, not write it).

Jeremy.


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