Return-Path: Received: from mx143.netapp.com ([216.240.21.24]:18885 "EHLO mx143.netapp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751191AbdCQVFK (ORCPT ); Fri, 17 Mar 2017 17:05:10 -0400 From: Olga Kornievskaia To: CC: Subject: [RFC v2 03/12] NFS OFFLOAD_STATUS op Date: Fri, 17 Mar 2017 17:03:48 -0400 Message-ID: <20170317210357.48079-4-kolga@netapp.com> In-Reply-To: <20170317210357.48079-1-kolga@netapp.com> References: <20170317210357.48079-1-kolga@netapp.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-nfs-owner@vger.kernel.org List-ID: Signed-off-by: Olga Kornievskaia --- fs/nfs/nfs42.h | 3 ++- fs/nfs/nfs42proc.c | 42 ++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 44 insertions(+), 1 deletion(-) diff --git a/fs/nfs/nfs42.h b/fs/nfs/nfs42.h index b6cd153..90ef9b4 100644 --- a/fs/nfs/nfs42.h +++ b/fs/nfs/nfs42.h @@ -19,5 +19,6 @@ int nfs42_proc_layoutstats_generic(struct nfs_server *, struct nfs42_layoutstat_data *); int nfs42_proc_clone(struct file *, struct file *, loff_t, loff_t, loff_t); - +int nfs42_proc_offload_status(struct file *, nfs4_stateid *, + struct nfs42_offload_status_res *); #endif /* __LINUX_FS_NFS_NFS4_2_H */ diff --git a/fs/nfs/nfs42proc.c b/fs/nfs/nfs42proc.c index 1e486c7..d4e7f60 100644 --- a/fs/nfs/nfs42proc.c +++ b/fs/nfs/nfs42proc.c @@ -254,6 +254,48 @@ ssize_t nfs42_proc_copy(struct file *src, loff_t pos_src, return err; } +int _nfs42_proc_offload_status(struct file *dst, nfs4_stateid *stateid, + struct nfs42_offload_status_res *res) +{ + struct nfs42_offload_status_args args; + struct nfs_server *dst_server = NFS_SERVER(file_inode(dst)); + struct rpc_message msg = { + .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OFFLOAD_STATUS], + .rpc_resp = res, + }; + int status; + + args.osa_src_fh = NFS_FH(file_inode(dst)); + memcpy(&args.osa_stateid, stateid, sizeof(args.osa_stateid)); + msg.rpc_argp = &args; + status = nfs4_call_sync(dst_server->client, dst_server, &msg, + &args.osa_seq_args, &res->osr_seq_res, 0); + if (status == -ENOTSUPP) + dst_server->caps &= ~NFS_CAP_OFFLOAD_STATUS; + + return status; +} + +int nfs42_proc_offload_status(struct file *dst, nfs4_stateid *stateid, + struct nfs42_offload_status_res *res) +{ + struct nfs_server *dst_server = NFS_SERVER(file_inode(dst)); + struct nfs4_exception exception = { }; + int status; + + if (!(dst_server->caps & NFS_CAP_OFFLOAD_STATUS)) + return -EOPNOTSUPP; + + do { + status = _nfs42_proc_offload_status(dst, stateid, res); + if (status == -ENOTSUPP) + return -EOPNOTSUPP; + status = nfs4_handle_exception(dst_server, status, &exception); + } while (exception.retry); + + return status; +} + static loff_t _nfs42_proc_llseek(struct file *filep, struct nfs_lock_context *lock, loff_t offset, int whence) { -- 1.8.3.1