[linux-cifs] Re: [PATCH 2/2] Define ENONAMESERVICE and ENAMEUNKNOWN to indicate name service errors


Interesting ... may allow us to map a few of the NT STATUS codes
to this new rc 135.  We will have to scan the error mapping table

On Wed, Feb 8, 2012 at 6:29 AM, David Howells  wrote:
> Now that the kernel has filesystems (and possibly other services) that want to
> look up internet addresses corresponding to arbitrary hostnames retrieved from
> the server, it would seem useful to provide a couple of error codes to indicate
> problems with the look up, rather than overloading some other error code.
>
> Define ENONAMESERVICE to indicate "Network name service unavailable". This can
> be used to indicate, for example, that an attempt was made by dns_query() to
> make a query, but the name server (e.g. a DNS server) it is supposed to contact
> didn't answer or that it couldn't determine the location of a suitable server.
>
> Define ENAMEUNKNOWN to indicate "Network name unknown". This can be used to
> indicate, for example, that an attempt was made by dns_query() to make a query,
> but the name server (e.g. a DNS server) replied indicating that it had no
> matching records.
>
> The DNS query upcall program can report these to keyctl_reject() so that cached
> failed queries will respond with these errors until they expire.
>
> Signed-off-by: David Howells 
> ---
>
> arch/alpha/include/asm/errno.h |  2 ++
> arch/mips/include/asm/errno.h  |  2 ++
> arch/parisc/include/asm/errno.h |  2 ++
> arch/sparc/include/asm/errno.h |  2 ++
> include/asm-generic/errno.h   |  2 ++
> 5 files changed, 10 insertions(+), 0 deletions(-)
>
> diff --git a/arch/alpha/include/asm/errno.h b/arch/alpha/include/asm/errno.h
> index 5edc21e..d6e8582 100644
> --- a/arch/alpha/include/asm/errno.h
> +++ b/arch/alpha/include/asm/errno.h
> @@ -122,6 +122,8 @@
>
> #define    ERFKILL     138   /* Operation not possible due to RF-kill */
> #define    ENOAUTHSERVICE 139   /* Authentication service not available */
> +#define    ENONAMESERVICE 140   /* Network name service unavailable */
> +#define    ENAMEUNKNOWN  141   /* Network name unknown */
>
> #define EHWPOISON   139   /* Memory page has hardware error */
>
> diff --git a/arch/mips/include/asm/errno.h b/arch/mips/include/asm/errno.h
> index 9e0b83f..5ae25aa 100644
> --- a/arch/mips/include/asm/errno.h
> +++ b/arch/mips/include/asm/errno.h
> @@ -121,6 +121,8 @@
>
> #define    ERFKILL     167   /* Operation not possible due to RF-kill */
> #define    ENOAUTHSERVICE 168   /* Authentication service not available */
> +#define    ENONAMESERVICE 169   /* Network name service unavailable */
> +#define    ENAMEUNKNOWN  170   /* Network name unknown */
>
> #define EHWPOISON   168   /* Memory page has hardware error */
>
> diff --git a/arch/parisc/include/asm/errno.h b/arch/parisc/include/asm/errno.h
> index c4598b6..6b3bc7f 100644
> --- a/arch/parisc/include/asm/errno.h
> +++ b/arch/parisc/include/asm/errno.h
> @@ -122,6 +122,8 @@
>
> #define    ERFKILL     256   /* Operation not possible due to RF-kill */
> #define    ENOAUTHSERVICE 257   /* Authentication service not available */
> +#define    ENONAMESERVICE 258   /* Network name service unavailable */
> +#define    ENAMEUNKNOWN  259   /* Network name unknown */
>
> #define EHWPOISON   257   /* Memory page has hardware error */
>
> diff --git a/arch/sparc/include/asm/errno.h b/arch/sparc/include/asm/errno.h
> index ab4f9f5..5fab088 100644
> --- a/arch/sparc/include/asm/errno.h
> +++ b/arch/sparc/include/asm/errno.h
> @@ -112,6 +112,8 @@
>
> #define    ERFKILL     134   /* Operation not possible due to RF-kill */
> #define    ENOAUTHSERVICE 135   /* Authentication service not available */
> +#define    ENONAMESERVICE 136   /* Network name service unavailable */
> +#define    ENAMEUNKNOWN  137   /* Network name unknown */
>
> #define EHWPOISON   135   /* Memory page has hardware error */
>
> diff --git a/include/asm-generic/errno.h b/include/asm-generic/errno.h
> index 52325ca..719f60c 100644
> --- a/include/asm-generic/errno.h
> +++ b/include/asm-generic/errno.h
> @@ -108,6 +108,8 @@
>
> #define ERFKILL        132   /* Operation not possible due to RF-kill */
> #define    ENOAUTHSERVICE 133   /* Authentication service not available */
> +#define    ENONAMESERVICE 134   /* Network name service unavailable */
> +#define    ENAMEUNKNOWN  135   /* Network name unknown */
>
> #define EHWPOISON   133   /* Memory page has hardware error */
>
>
> --
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-- 
Thanks,

Steve

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