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From: Eric Sandeen <sandeen@sandeen.net>
To: Chris Walker <christopher.walker@gmail.com>
Cc: xfs@oss.sgi.com
Subject: Re: quick question about filename length
Date: Sat, 16 May 2009 12:04:40 -0500	[thread overview]
Message-ID: <4A0EF228.3010702@sandeen.net> (raw)
In-Reply-To: <554e24be0905160915l49ff901bn41e4332349c555bc@mail.gmail.com>

Chris Walker wrote:
> Hello,
> 
> I see that
> #define MAXNAMELEN  256
> 
> Is this the maximum length of the filename with full path?  Or is this
> just the name of the file?
> 
> Many thanks!
> Chris

/*
 * MAXNAMELEN is the length (including the terminating null) of
 * the longest permissible file (component) name.
 */
#define MAXNAMELEN      256

"component" means path component.  So just the name of the file or dir
in the path.

See also how it's used in xfs_vn_lookup() for example:

        if (dentry->d_name.len >= MAXNAMELEN)
                return ERR_PTR(-ENAMETOOLONG);

a dentry is one component of the path, not the entire path.

-Eric

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  reply	other threads:[~2009-05-16 17:04 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-05-16 16:15 quick question about filename length Chris Walker
2009-05-16 17:04 ` Eric Sandeen [this message]
2009-05-16 18:06   ` Chris Walker
2009-05-16 20:25     ` Christoph Hellwig
2009-05-16 21:42       ` Martin Steigerwald

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