Return-Path: Received: from mail-pd0-f169.google.com ([209.85.192.169]:35924 "EHLO mail-pd0-f169.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752370AbbGMJHT (ORCPT ); Mon, 13 Jul 2015 05:07:19 -0400 Received: by pdjr16 with SMTP id r16so59666229pdj.3 for ; Mon, 13 Jul 2015 02:07:18 -0700 (PDT) From: Peng Tao To: linux-nfs@vger.kernel.org Cc: Trond Myklebust , Anna Schumaker , Peng Tao Subject: [PATCH v2 4/8] nfs42: add CLONE proc functions Date: Mon, 13 Jul 2015 17:06:04 +0800 Message-Id: <1436778368-65447-5-git-send-email-tao.peng@primarydata.com> In-Reply-To: <1436778368-65447-1-git-send-email-tao.peng@primarydata.com> References: <1436778368-65447-1-git-send-email-tao.peng@primarydata.com> Sender: linux-nfs-owner@vger.kernel.org List-ID: Signed-off-by: Peng Tao --- fs/nfs/nfs42.h | 1 + fs/nfs/nfs42proc.c | 71 +++++++++++++++++++++++++++++++++++++++++++++++ fs/nfs/nfs4proc.c | 3 +- include/linux/nfs_fs_sb.h | 1 + 4 files changed, 75 insertions(+), 1 deletion(-) diff --git a/fs/nfs/nfs42.h b/fs/nfs/nfs42.h index 814c125..b587ccd 100644 --- a/fs/nfs/nfs42.h +++ b/fs/nfs/nfs42.h @@ -17,5 +17,6 @@ int nfs42_proc_deallocate(struct file *, loff_t, loff_t); loff_t nfs42_proc_llseek(struct file *, loff_t, int); 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); #endif /* __LINUX_FS_NFS_NFS4_2_H */ diff --git a/fs/nfs/nfs42proc.c b/fs/nfs/nfs42proc.c index dd33a24..01031f7 100644 --- a/fs/nfs/nfs42proc.c +++ b/fs/nfs/nfs42proc.c @@ -253,3 +253,74 @@ int nfs42_proc_layoutstats_generic(struct nfs_server *server, rpc_put_task(task); return 0; } + +static int _nfs42_proc_clone(struct rpc_message *msg, struct file *src_f, + struct file *dst_f, loff_t src_offset, + loff_t dst_offset, loff_t count) +{ + struct inode *src_inode = file_inode(src_f); + struct inode *dst_inode = file_inode(dst_f); + struct nfs_server *server = NFS_SERVER(dst_inode); + struct nfs42_clone_args args = { + .src_fh = NFS_FH(src_inode), + .dst_fh = NFS_FH(dst_inode), + .src_offset = src_offset, + .dst_offset = dst_offset, + .dst_bitmask = server->cache_consistency_bitmask, + }; + struct nfs42_clone_res res = { + .server = server, + }; + int status; + + msg->rpc_argp = &args; + msg->rpc_resp = &res; + + status = nfs42_set_rw_stateid(&args.src_stateid, src_f, FMODE_READ); + if (status) + return status; + + status = nfs42_set_rw_stateid(&args.dst_stateid, dst_f, FMODE_WRITE); + if (status) + return status; + + res.dst_fattr = nfs_alloc_fattr(); + if (!res.dst_fattr) + return -ENOMEM; + + status = nfs4_call_sync(server->client, server, msg, + &args.seq_args, &res.seq_res, 0); + if (status == 0) + status = nfs_post_op_update_inode(dst_inode, res.dst_fattr); + + kfree(res.dst_fattr); + return status; +} + +int nfs42_proc_clone(struct file *src_f, struct file *dst_f, + loff_t src_offset, loff_t dst_offset, loff_t count) +{ + struct rpc_message msg = { + .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLONE], + }; + struct inode *inode = file_inode(src_f); + struct nfs_server *server = NFS_SERVER(file_inode(src_f)); + struct nfs4_exception exception = { }; + int err; + + if (!nfs_server_capable(inode, NFS_CAP_CLONE)) + return -EOPNOTSUPP; + + do { + err = _nfs42_proc_clone(&msg, src_f, dst_f, src_offset, + dst_offset, count); + if (err == -ENOTSUPP || err == -EOPNOTSUPP) { + NFS_SERVER(inode)->caps &= ~NFS_CAP_CLONE; + return -EOPNOTSUPP; + } + err = nfs4_handle_exception(server, err, &exception); + } while (exception.retry); + + return err; + +} diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 6f228b5..a61e815 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -8646,7 +8646,8 @@ static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = { | NFS_CAP_ALLOCATE | NFS_CAP_DEALLOCATE | NFS_CAP_SEEK - | NFS_CAP_LAYOUTSTATS, + | NFS_CAP_LAYOUTSTATS + | NFS_CAP_CLONE, .init_client = nfs41_init_client, .shutdown_client = nfs41_shutdown_client, .match_stateid = nfs41_match_stateid, diff --git a/include/linux/nfs_fs_sb.h b/include/linux/nfs_fs_sb.h index a2ea149..682b751 100644 --- a/include/linux/nfs_fs_sb.h +++ b/include/linux/nfs_fs_sb.h @@ -238,5 +238,6 @@ struct nfs_server { #define NFS_CAP_ALLOCATE (1U << 20) #define NFS_CAP_DEALLOCATE (1U << 21) #define NFS_CAP_LAYOUTSTATS (1U << 22) +#define NFS_CAP_CLONE (1U << 23) #endif -- 1.8.3.1