This patch series builds on top of async COPY series. In case, of the "inter" SSC copy files reside on different servers and thus under different superblocks and require that VFS removes the restriction that src and dst files must be on the same superblock. NFS's copy_file_range() determines if the copy is "intra" or "inter" and for "inter" it sends the COPY_NOTIFY to the source server. Then, it would send of an asynchronous COPY to the destination server. A couple of patches are added for the destination server acting as the client when talking to the source server. It's now acting as a client and needs to do a special "open" and "close". Since destination server doesn't do an open on the wire, we "fake" create the needed data structures and that's done in the new function nfs42_ssc_open(). To clean up this open but not trigger the CLOSE on the wire, we have a new function nfs42_ssc_close() that accomplishes that. This is patch "NFS inter ssc open" Handling reboot of the destination server when client is waiting on the CB_OFFLOAD happens when SEQUENCE discovers that destination server rebooted. The open state initially is marked to be NFS_CLNT_DST_SSC_COPY_STATE during the COPY. Then during the recovery if state is marked as such, then look thru the list of copies for the server and see if any are associated with this recovering open, if so mark the copy rebooted and wake up the waiting copy. Upon wake up the waiting copy, will restart the copy from scratch. This is patch "NFS skip recovery of copy open on dest server". If the server returned ESTALE or ERR_OFFLOAD_DENIED fallback on the traditional copy. Olga Kornievskaia (11): VFS permit cross device vfs_copy_file_range NFS test for intra vs inter COPY NFS recover from destination server reboot for copies NFS NFSD defining nl4_servers structure needed by both NFS add COPY_NOTIFY operation NFS add ca_source_server<> to COPY NFS also send OFFLOAD_CANCEL to source server NFS inter ssc open NFS skip recovery of copy open on dest server NFS for "inter" copy treat ESTALE as ENOTSUPP NFS COPY handle ERR_OFFLOAD_DENIED Documentation/filesystems/vfs.txt | 6 ++ fs/nfs/nfs42.h | 14 ++- fs/nfs/nfs42proc.c | 141 +++++++++++++++++++++++++--- fs/nfs/nfs42xdr.c | 193 +++++++++++++++++++++++++++++++++++++- fs/nfs/nfs4_fs.h | 13 +++ fs/nfs/nfs4file.c | 135 +++++++++++++++++++++++++- fs/nfs/nfs4proc.c | 6 +- fs/nfs/nfs4state.c | 31 +++++- fs/nfs/nfs4xdr.c | 1 + fs/read_write.c | 13 ++- include/linux/nfs4.h | 25 +++++ include/linux/nfs_fs.h | 2 + include/linux/nfs_fs_sb.h | 1 + include/linux/nfs_xdr.h | 17 ++++ 14 files changed, 571 insertions(+), 27 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
