Date: Fri, 21 Nov 2014 10:25:45 -0500 From: John Baldwin <jhb@freebsd.org> To: freebsd-fs@freebsd.org Subject: Re: RFC: patch to make d_fileno 64bits Message-ID: <9692214.Bs3rxl0ePH@ralph.baldwin.cx> In-Reply-To: <539201047.4538834.1416539954794.JavaMail.root@uoguelph.ca> References: <539201047.4538834.1416539954794.JavaMail.root@uoguelph.ca>
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On Thursday, November 20, 2014 10:19:14 PM Rick Macklem wrote: > The attached patch covers the basics of a way to > convert the d_fileno field of "struct dirent" to > 64bits. This patch is incomplete and won't even > build, but I thought I'd post it in case anyone > wanted to take a look and comment on the approach > it uses. > > - renames the old/current one "struct dirent32" > - changes d_fileno to 64bits and adds a 64bit > d_off field for the offset of the underlying > file system > - defines a new VOP_READDIR() that will return > the new "struct dirent" that is used as the > default one for a new getdirentries(2). > - the old/current getdirentries(2) uses the old > VOP_READDIR32() by default. > > For the case of a file system that supports both > the new and old VOP_READDIR(), they are used by > the corresponding new and old getdirentries(2) > syscalls. > > For a file system that only supports one of > the VOP_READDIR()s, the "struct dirent32" > is copied to "struct dirent" (or vice versa). > > At this point, all file systems would support > the old VOP_READDIR() and I think the new > VOP_READDIR() can easily be added for NFS, > ZFS. (OpenBSD already has UFS code for > essentially a new struct dirent and hopefully > that code could be ported easily, too.) > > Anyhow, any comments on this approach? rick I think this is already done (along with several other changes) more fully in the projects/ino64 branch in svn? -- John Baldwin
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