The following patch set supports NFS4 replication for read only file systems. The beginning set of patches are derived from Chuck Lever's migration tree. The later set of patches support replication from the interface built from the migration patches. Simple testing shows that it works! Here are some issues that I already know. Hopefully all of them including any new issues will be resolved with the help of this list. 1. Replacing a transport (rpc_xprt) needs waiting for all the pending RPC tasks. This doesn't work for now. 2. In order to use the replicated server, in addition to replacing the transport, we also clone a new nfs_client. Currently the old nfs_client structure is not released. We can wait for all the active commands and then release the nfs_client (needs more work!). Or simply keep all old nfs_clients until nfs_free_server() is called and then release them. Regards, Malahal. Chuck Lever (3): SUNRPC: Add API to acquire source address NFS: Add an API for cloning an nfs_client NFS: Save root file handle in nfs_server Malahal Naineni (6): NFS: Store server locations for replication NFS: Add replica servers to volumes proc file. NFS: Add replace transport infrastructure for replication NFS: Add replication capability to state manager thread. NFS: Handle replication on a timeout error NFS: Avoid spurious replication recoveries Trond Myklebust (4): SUNRPC: Allow temporary blocking of an rpc client SUNRPC: Use RCU to dereference the rpc_clnt.cl_xprt field SUNRPC: Move clnt->cl_server into struct rpc_xprt SUNRPC: Add a helper to switch the transport of the rpc_client fs/nfs/callback.c | 3 +- fs/nfs/callback_proc.c | 9 +- fs/nfs/client.c | 84 +++++++- fs/nfs/getroot.c | 3 + fs/nfs/internal.h | 4 + fs/nfs/nfs4_fs.h | 6 + fs/nfs/nfs4namespace.c | 148 +++++++++++++ fs/nfs/nfs4proc.c | 69 ++++++- fs/nfs/nfs4state.c | 39 +++- fs/nfs/nfs4xdr.c | 16 +- fs/nfs/super.c | 56 +++++ include/linux/nfs_fs_sb.h | 8 + include/linux/nfs_xdr.h | 3 + include/linux/sunrpc/clnt.h | 22 ++- include/linux/sunrpc/debug.h | 11 + include/linux/sunrpc/xprt.h | 2 + net/sunrpc/clnt.c | 473 ++++++++++++++++++++++++++++++++++++----- net/sunrpc/rpc_pipe.c | 5 +- net/sunrpc/rpcb_clnt.c | 24 ++- net/sunrpc/stats.c | 6 +- net/sunrpc/xprt.c | 15 ++- 21 files changed, 902 insertions(+), 104 deletions(-) -- 1.7.8.3 -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
