Re: Kernel 2.4 and 2.6 disagree about NFSEXP_CROSSMNT - upward incompatibility, please fix

From: Andrew Morton (akpm_at_osdl.org)
Date: 08/01/03

  • Next message: Andrew Morton: "Re: kernel 2.6.0 test1 and test2"
    Date:	Thu, 31 Jul 2003 15:05:48 -0700
    To: Chip Salzenberg <chip@pobox.com>
    
    

    Chip Salzenberg <chip@pobox.com> wrote:
    >
    > According to Steve Dickson:
    > > It seems in nfs-utils-1.05 (actually it happen in 1.0.4)
    > > the NFSEXP_CROSSMNT define was changed to 0x4000 ....
    >
    > This looks like an actual kernel incompatibility 2.4 <-> 2.6, as
    > the 2.4 and 2.6 trees disagree about the value of NFSEXP_CROSSMNT.

    yup.

    > > So could please add this patch that simply switchs the bits
    > > so NFSEXP_CROSSMNT stays the same and the new NFSEXP_NOHIDE define
    > > gets the higher bit?
    >
    > And 2.6's include/linux/nfsd/export.h needs the same fix. This needs
    > to go in before the 2.6.0 release or nfs-utils is in deep kimchi.

    Like this?

    diff -puN include/linux/nfsd/export.h~nfs-flags-untangle include/linux/nfsd/export.h
    --- 25/include/linux/nfsd/export.h~nfs-flags-untangle Thu Jul 31 15:04:25 2003
    +++ 25-akpm/include/linux/nfsd/export.h Thu Jul 31 15:04:49 2003
    @@ -35,12 +35,12 @@
     #define NFSEXP_UIDMAP 0x0040
     #define NFSEXP_KERBEROS 0x0080 /* not available */
     #define NFSEXP_SUNSECURE 0x0100
    -#define NFSEXP_NOHIDE 0x0200
    +#define NFSEXP_CROSSMNT 0x0200
     #define NFSEXP_NOSUBTREECHECK 0x0400
     #define NFSEXP_NOAUTHNLM 0x0800 /* Don't authenticate NLM requests - just trust */
     #define NFSEXP_MSNFS 0x1000 /* do silly things that MS clients expect */
     #define NFSEXP_FSID 0x2000
    -#define NFSEXP_CROSSMNT 0x4000
    +#define NFSEXP_NOHIDE 0x4000
     #define NFSEXP_ALLFLAGS 0x7FFF
     
     

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