Re: [PATCH v15 7/9] open: introduce openat2(2) syscall

Aleksa Sarai
2019-11-13T02:36:20Z

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On 2019-11-13, Al Viro <viro@zeniv.linux.org.uk> wrote:
> On Tue, Nov 05, 2019 at 08:05:51PM +1100, Aleksa Sarai wrote:
> > +/*
> > + * Arguments for how openat2(2) should open the target path. If @resolve is
> > + * zero, then openat2(2) operates very similarly to openat(2).
> > + *
> > + * However, unlike openat(2), unknown bits in @flags result in -EINVAL rather
> > + * than being silently ignored. @mode must be zero unless one of {O_CREAT,
> > + * O_TMPFILE} are set, and @upgrade_mask must be zero unless O_PATH is set.
> > + *
> > + * @flags: O_* flags.
> > + * @mode: O_CREAT/O_TMPFILE file mode.
> > + * @upgrade_mask: UPGRADE_* flags (to restrict O_PATH re-opening).
>
> ???

Sorry, that was left over from a previous revision (where the magic-link
re-opening restrictions were part of this series).

> > + * @resolve: RESOLVE_* flags.
> > + */
> > +struct open_how {
> > + __aligned_u64 flags;
> > + __u16 mode;
> > + __u16 __padding[3]; /* must be zeroed */
> > + __aligned_u64 resolve;
> > +};

--
Aleksa Sarai
Senior Software Engineer (Containers)
SUSE Linux GmbH
<https://www.cyphar.com/>

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