Return-Path: Received: from mx141.netapp.com ([216.240.21.12]:13539 "EHLO mx141.netapp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751348AbdJMUzv (ORCPT ); Fri, 13 Oct 2017 16:55:51 -0400 From: Olga Kornievskaia To: , CC: Subject: [PATCH v5 00/23] NFS support for async intra COPY Date: Fri, 13 Oct 2017 16:55:38 -0400 Message-ID: <20171013205550.65573-1-kolga@netapp.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-nfs-owner@vger.kernel.org List-ID: Change the client side to always request an asynchronous copy. If server replies to the COPY with the copy stateid, client will go wait on the CB_OFFLOAD. To fend off the race between CB_OFFLOAD and COPY reply, we check the list of pending callbacks before going to wait. Client adds the copy to the global list of copy stateids for the callback to look thru and signal the waiting copy. When the client receives reply from the CB_OFFLOAD with some bytes and committed how is UNSTABLE, then COMMIT is sent to the server. The results arep propagated to the VFS and application. Assuming that application will deal with a partial result and continue from the new offset if needed. If server errs with ERR_OFFLOAD_NOREQS the copy will be re-sent as a synchronous COPY. If application cancels an in-flight COPY, OFFLOAD_CANCEL is sent to the server (sending it as an async RPC in the context of the nfsid_workqueue). v5: 1. fixed status wasn't initialized GCC complained. 2. fixed comment typo and moved initialization of status from one patch to another 3. moved the handling of the commit after copy into its own function and when verifier verification fails, returning EAGAIN so the whole copy is retried again. Anna Schumaker (1): fs: Don't copy beyond the end of the file Olga Kornievskaia (11): NFS CB_OFFLOAD xdr NFS OFFLOAD_STATUS xdr NFS OFFLOAD_STATUS op NFS OFFLOAD_CANCEL xdr NFS COPY xdr handle async reply NFS add support for asynchronous COPY NFS handle COPY reply CB_OFFLOAD call race NFS export nfs4_async_handle_error NFS send OFFLOAD_CANCEL when COPY killed NFS handle COPY ERR_OFFLOAD_NO_REQS NFS add a simple sync nfs4_proc_commit after async COPY Documentation/filesystems/vfs.txt | 6 + fs/nfs/callback.h | 12 ++ fs/nfs/callback_proc.c | 54 ++++++ fs/nfs/callback_xdr.c | 81 +++++++- fs/nfs/client.c | 1 + fs/nfs/nfs42.h | 17 +- fs/nfs/nfs42proc.c | 378 +++++++++++++++++++++++++++++++++++-- fs/nfs/nfs42xdr.c | 380 ++++++++++++++++++++++++++++++++++++-- fs/nfs/nfs4_fs.h | 18 +- fs/nfs/nfs4client.c | 15 ++ fs/nfs/nfs4file.c | 135 +++++++++++++- fs/nfs/nfs4proc.c | 44 ++++- fs/nfs/nfs4state.c | 31 +++- fs/nfs/nfs4xdr.c | 3 + fs/read_write.c | 16 +- include/linux/nfs4.h | 27 +++ include/linux/nfs_fs.h | 11 ++ include/linux/nfs_fs_sb.h | 5 + include/linux/nfs_xdr.h | 31 ++++ 19 files changed, 1219 insertions(+), 46 deletions(-) -- 1.8.3.1