From: "Darrick J. Wong" <darrick.wong@oracle.com>
To: Dave Chinner <david@fromorbit.com>
Cc: linux-xfs@vger.kernel.org
Subject: Re: [PATCH 07/13] xfs: create structure verifier function for shortform xattrs
Date: Tue, 19 Dec 2017 13:04:09 -0800 [thread overview]
Message-ID: <20171219210409.GF12613@magnolia> (raw)
In-Reply-To: <20171219205129.GA4094@dastard>
On Wed, Dec 20, 2017 at 07:51:29AM +1100, Dave Chinner wrote:
> On Tue, Dec 19, 2017 at 12:41:47PM -0800, Darrick J. Wong wrote:
> > On Tue, Dec 19, 2017 at 04:23:29PM +1100, Dave Chinner wrote:
> > > On Wed, Dec 13, 2017 at 03:58:55PM -0800, Darrick J. Wong wrote:
> > > > From: Darrick J. Wong <darrick.wong@oracle.com>
> > > >
> > > > Create a function to perform structure verification for short form
> > > > extended attributes.
> > > >
> > > > Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
> > > > ---
> > > > + /* Check for invalid namespace combinations. */
> > > > + if ((sfep->flags & XFS_ATTR_ROOT) &&
> > > > + (sfep->flags & XFS_ATTR_SECURE))
> > > > + return __this_address;
> > >
> > > #define ATTR_SF_FLAGS (XFS_ATTR_ROOT | XFS_ATTR_SECURE)
> >
> > XFS_ATTR_NSP_ONDISK_MASK?
>
> Yeah, that works. I didn't go looking for an existing definition :/
>
> > >
> > > if (sfep->flags & ~ATTR_SF_FLAGS)
> > > return __this_address;
> > > if ((sfep->flags & ATTR_SF_FLAGS) == ATTR_SF_FLAGS)
> > > return __this_address;
> >
> > Also, can we just use hweight8() > 1 here? We only allow one namespace
> > bit per attr.
>
> With a comment, yes, otherwise someone unfamiliar with what
> hweight() does will have to go do lots of extra work to understand
> the code.
/*
* Check for invalid namespace combinations. We only allow
* one namespace flag per xattr, so we can just count the
* bits (i.e. hweight) here.
*/
--D
>
> Cheers,
>
> Dave.
> --
> Dave Chinner
> david@fromorbit.com
> --
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next prev parent reply other threads:[~2017-12-19 21:04 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-13 23:58 [PATCH 00/13] xfs: more and better verifiers Darrick J. Wong
2017-12-13 23:58 ` [PATCH 01/13] xfs: refactor long-format btree header verification routines Darrick J. Wong
2017-12-14 22:06 ` Dave Chinner
2017-12-15 0:12 ` Darrick J. Wong
2017-12-13 23:58 ` [PATCH 02/13] xfs: remove XFS_WANT_CORRUPTED_RETURN from dir3 data verifiers Darrick J. Wong
2017-12-19 3:50 ` Dave Chinner
2017-12-13 23:58 ` [PATCH 03/13] xfs: have buffer verifier functions report failing address Darrick J. Wong
2017-12-19 4:12 ` Dave Chinner
2017-12-19 20:26 ` Darrick J. Wong
2017-12-13 23:58 ` [PATCH 04/13] xfs: refactor verifier callers to print address of failing check Darrick J. Wong
2017-12-14 22:03 ` Dave Chinner
2017-12-15 0:04 ` Darrick J. Wong
2017-12-15 3:09 ` Dave Chinner
2017-12-19 20:29 ` Darrick J. Wong
2017-12-13 23:58 ` [PATCH 05/13] xfs: verify dinode header first Darrick J. Wong
2017-12-19 4:13 ` Dave Chinner
2017-12-13 23:58 ` [PATCH 06/13] xfs: move inode fork verifiers to xfs_dinode_verify Darrick J. Wong
2017-12-19 5:16 ` Dave Chinner
2017-12-19 20:34 ` Darrick J. Wong
2017-12-19 20:48 ` Dave Chinner
2017-12-13 23:58 ` [PATCH 07/13] xfs: create structure verifier function for shortform xattrs Darrick J. Wong
2017-12-19 5:23 ` Dave Chinner
2017-12-19 20:41 ` Darrick J. Wong
2017-12-19 20:51 ` Dave Chinner
2017-12-19 21:04 ` Darrick J. Wong [this message]
2017-12-13 23:59 ` [PATCH 08/13] xfs: create structure verifier function for short form symlinks Darrick J. Wong
2017-12-19 5:27 ` Dave Chinner
2017-12-19 20:45 ` Darrick J. Wong
2017-12-13 23:59 ` [PATCH 09/13] xfs: refactor short form directory structure verifier function Darrick J. Wong
2017-12-19 5:45 ` Dave Chinner
2017-12-13 23:59 ` [PATCH 10/13] xfs: provide a centralized method for verifying inline fork data Darrick J. Wong
2017-12-19 6:06 ` Dave Chinner
2017-12-19 20:50 ` Darrick J. Wong
2017-12-13 23:59 ` [PATCH 11/13] xfs: fail out of xfs_attr3_leaf_lookup_int if it looks corrupt Darrick J. Wong
2017-12-19 6:13 ` Dave Chinner
2017-12-13 23:59 ` [PATCH 12/13] xfs: create a new buf_ops pointer to verify structure metadata Darrick J. Wong
2017-12-19 6:22 ` Dave Chinner
2017-12-19 18:15 ` Darrick J. Wong
2017-12-19 20:53 ` Dave Chinner
2017-12-13 23:59 ` [PATCH 13/13] xfs: scrub in-core metadata Darrick J. Wong
2017-12-19 6:23 ` Dave Chinner
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