From: Andy Adamson <andros@xxxxxxxxxx> Version-5 --------- Responded to Anna's code cleanup comments. --> Andy Version-4 --------- This patch set enables session trunking configured two ways. The NFSv4 minorversion > 0 pseudo-fs is probed with a GETATTR(fs_locations) to retrieve a replicas list. Each replica address is tested for session trunking. Those that pass are added as aliases to the mount rpc client. Try all multipath addresses for a data server. The first address that successfully connects and creates a session is the mount address. All subsequent addresses are tested for session trunking and added as aliases. TODO: - Periodically probe the pseudo-fs with the GETATTR(fs_locations) to pick up server multipath changes. This is why the GETATTR(fs_locations) is a stand alone call. - Call BIND_CONN_TO_SESSION for session trunking addresses established under SP4_MACH_CRED or SP4_SSV. SP4_NONE established addresses do not require BIND_CONN_TO_SESSION. TESTING: The pseudo-fs GETATTR(fs_locations) probe session trunking was tested against a Linux server with a pseudo-fs export stanza (e.g. a stanza with the fsid=0 or fsid=root export option) and a replicas= export option (replicas=<path1>@<server1>:<path2>@<server2>..) Note that this configuration is for testing only. A future patchset will add the replicas= configuration to the NFSEXP_V4ROOT nfsd and mountd processing. The pNFS DS multipath session trunking was tested against a pynfs server which provides DS multipath configuration. Andy Adamson (10): NFS rename default callback ops NFS refactor nfs4_match_clientids NFS refactor nfs4_check_serverowner_major_id NFS detect session trunking NFS refactor _nfs4_proc_exchange_id for session trunking SUNRPC add flag to rpc_task_release_client NFS probe pseudo-fs for replicas NFS test and add multipaths for session trunking NFS test pnfs data server multipath session trunking aliases NFS add multiaddr to nfs_show_nfsv4_options fs/nfs/internal.h | 2 + fs/nfs/nfs4_fs.h | 9 ++ fs/nfs/nfs4client.c | 102 +++++++++++++++++--- fs/nfs/nfs4getroot.c | 3 + fs/nfs/nfs4proc.c | 222 ++++++++++++++++++++++++++++++++++++++++++-- fs/nfs/nfs4xdr.c | 38 +++----- fs/nfs/pnfs_nfs.c | 51 +++++++--- fs/nfs/super.c | 26 ++++++ include/linux/nfs_xdr.h | 4 +- include/linux/sunrpc/clnt.h | 2 +- net/sunrpc/clnt.c | 6 +- net/sunrpc/sched.c | 2 +- net/sunrpc/xprtmultipath.c | 4 + 13 files changed, 406 insertions(+), 65 deletions(-) -- 1.8.3.1 -- 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
