> [1 <text/plain; us-ascii (7bit)>] The RPC layer used by the NFS
> client restricts the number of groups to 16. This seems to be a
> hard protocol limit. The patch below gets around this
> limitation by implementing a group id cache in the RPC layer.
This is a hard limit that is part of the Sun RPC's 'UNIX
authentication' scheme. The X/Open group specifies the RPC definition
as
struct auth_unix {
unsigned int stamp;
string machinename<255>;
unsigned int uid;
unsigned int gid;
unsigned int gids<16>;
};
Please note that other authentication schemes (DES, Kerberos etc.)
define completely different structures.
Cheers,
Trond
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