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Re: [PATCH] v3 inodes are only valid on crc-enabled filesystems.

To: Dave Chinner <david@xxxxxxxxxxxxx>
Subject: Re: [PATCH] v3 inodes are only valid on crc-enabled filesystems.
From: Roger Willcocks <roger@xxxxxxxxxxxxxxxx>
Date: Sun, 16 Aug 2015 12:34:10 +0100
Cc: Roger Willcocks <roger@xxxxxxxxxxxxxxxx>, xfs@xxxxxxxxxxx
Delivered-to: xfs@xxxxxxxxxxx
In-reply-to: <20150816004242.GA3902@dastard>
References: <C69467E1-642A-422A-8ECF-FDED92550B1B@xxxxxxxxxxxxxxxx> <20150816004242.GA3902@dastard>
On 16 Aug 2015, at 01:42, Dave Chinner <david@xxxxxxxxxxxxx> wrote:

> On Sun, Aug 16, 2015 at 01:14:55AM +0100, Roger Willcocks wrote:
>> Fix an xfs_repair regression reported by Leslie Rhorer where a bad
>> (v3) inode version number was not reset.
>> 
>> Signed-off-by: Roger Willcocks <roger@xxxxxxxxxxxxxxxx>
>> 
>> -#define XFS_DINODE_GOOD_VERSION(v)  ((v) >= 1 && (v) <= 3)
>> +#define XFS_DINODE_GOOD_VERSION(sb, v) \
>> +    (xfs_sb_version_hascrc(sb) ? ((v) == 3) : ((v) == 1 || (v) == 2))
> 
> I'd make this a static inline function so it gets type checking and
> it is easier to understand the logic at a glance. i.e. something
> like:
> 
> static inline bool
> xfs_dinode_good_version(struct xfs_mount *mp, __uint8_t version)
> {
>       if (version < 1 || version > 3)
>               return false;
>       if (xfs_sb_version_hascrc(&mp->m_sb)) {
>               if (version != 3)
>                       return false;
>       } else if (version > 2)
>               return false;
> 
>       return true;
> }
> 

include of xfs_dinode.h has to be moved to after the definition of
xfs_mount in libxfs.h, but that’s okay following the pattern set by
xfs_da_format.h.

Updated patch follows.

—
Roger

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