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SUNRPC/NFSD: Support a new option for ignoring the result of svc_register

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NFSv4 clients can contact port 2049 directly instead of needing the
portmapper.

Therefore a failure to register to the portmapper when starting an
NFSv4-only server isn't really a problem.

But Gareth Williams reports that an attempt to start an NFSv4-only
server without starting portmap fails:

  #rpc.nfsd -N 2 -N 3
  rpc.nfsd: writing fd to kernel failed: errno 111 (Connection refused)
  rpc.nfsd: unable to set any sockets for nfsd

Add a flag to svc_version to tell the rpc layer it can safely ignore an
rpcbind failure in the NFSv4-only case.

Reported-by: Gareth Williams <gareth@garethwilliams.me.uk>
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Kinglong Mee
2013-12-31 13:17:20 +08:00
committed by J. Bruce Fields
parent 8a891633b8
commit 7e55b59b2f
3 changed files with 21 additions and 9 deletions
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4
include/linux/sunrpc/svc.h
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@@ -386,8 +386,10 @@ struct svc_version {
struct svc_procedure * vs_proc; /* per-procedure info */
u32 vs_xdrsize; /* xdrsize needed for this version */
unsigned int vs_hidden : 1; /* Don't register with portmapper.
unsigned int vs_hidden : 1, /* Don't register with portmapper.
* Only used for nfsacl so far. */
vs_rpcb_optnl:1;/* Don't care the result of register.
* Only used for nfsv4. */
/* Override dispatch function (e.g. when caching replies).
* A return value of 0 means drop the request.