The current knfsd implementation is unable to support containers that
want to run different combinations of NFS versions. This is because of
the way we define which versions are supported: by directly editing the
global version table in 'nfsd_program'.
The following patch set modifies the method used to define version
information by moving some of the server RPC request initialisation
down into knfsd itself, allowing it to manage the version-specific
initialisation.
Note that we might want to consider a few follow ups to this patchset
to get rid of some of the version-specific flags (e.g. vs_hidden) that
currently need to be managed in the generic SUNRPC server code on behalf
of just one or two RPC programs. These flags can easily by replaced by
custom RPC request initialisers.
---
v2: Fix compile issues when CONFIG_NFSD_V2_ACL and CONFIG_NFSD_V3_ACL
are undefined.
Don't move the svc_reserve() call in svc_process_common(), since
that can trigger 'RPC request reserved xxx but used yyy' issues.
Trond Myklebust (6):
SUNRPC/nfs: Fix return value for nfs4_callback_compound()
SUNRPC: Add a callback to initialise server requests
SUNRPC: Clean up generic dispatcher code
SUNRPC: Allow further customisation of RPC program registration
nfsd: Add custom rpcbind callbacks for knfsd
nfsd: Allow containers to set supported nfs versions
fs/lockd/svc.c | 4 +-
fs/nfs/callback.c | 2 +
fs/nfs/callback_xdr.c | 2 +-
fs/nfsd/netns.h | 8 +
fs/nfsd/nfs4proc.c | 3 +-
fs/nfsd/nfsctl.c | 25 ++--
fs/nfsd/nfsd.h | 8 +-
fs/nfsd/nfssvc.c | 255 +++++++++++++++++++++++++------
include/linux/sunrpc/svc.h | 33 ++++
net/sunrpc/svc.c | 298 ++++++++++++++++++++++++-------------
10 files changed, 478 insertions(+), 160 deletions(-)
--
2.20.1
