From patchwork Thu Jan 22 11:10:00 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 5684011 Return-Path: X-Original-To: patchwork-linux-fsdevel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 9419EC058E for ; Thu, 22 Jan 2015 11:12:00 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id CD207200F4 for ; Thu, 22 Jan 2015 11:11:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D94B32035D for ; Thu, 22 Jan 2015 11:11:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752062AbbAVLLv (ORCPT ); Thu, 22 Jan 2015 06:11:51 -0500 Received: from casper.infradead.org ([85.118.1.10]:41432 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751878AbbAVLLY (ORCPT ); Thu, 22 Jan 2015 06:11:24 -0500 Received: from [83.175.99.196] (helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.80.1 #2 (Red Hat Linux)) id 1YEFfX-0004aN-1L; Thu, 22 Jan 2015 11:11:23 +0000 From: Christoph Hellwig To: "J. Bruce Fields" Cc: Jeff Layton , linux-nfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, xfs@oss.sgi.com Subject: [PATCH 14/20] exportfs: add methods for block layout exports Date: Thu, 22 Jan 2015 12:10:00 +0100 Message-Id: <1421925006-24231-15-git-send-email-hch@lst.de> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1421925006-24231-1-git-send-email-hch@lst.de> References: <1421925006-24231-1-git-send-email-hch@lst.de> X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org See http://www.infradead.org/rpr.html Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add three methods to allow exporting pnfs block layout volumes: - get_uuid: get a filesystem unique signature exposed to clients - map_blocks: map and if nessecary allocate blocks for a layout - commit_blocks: commit blocks in a layout once the client is done with them For now we stick the external pnfs block layout interfaces into s_export_op to avoid mixing them up with the internal interface between the NFS server and the layout drivers. Once we've fully internalized the latter interface we can redecide if these methods should stay in s_export_ops. Signed-off-by: Christoph Hellwig --- include/linux/exportfs.h | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/include/linux/exportfs.h b/include/linux/exportfs.h index 41b223a..ff46bf7 100644 --- a/include/linux/exportfs.h +++ b/include/linux/exportfs.h @@ -4,6 +4,7 @@ #include struct dentry; +struct iattr; struct inode; struct super_block; struct vfsmount; @@ -180,6 +181,19 @@ struct fid { * get_name is not (which is possibly inconsistent) */ +/* types of block ranges for multipage write mappings. */ +#define IOMAP_HOLE 0x01 /* no blocks allocated, need allocation */ +#define IOMAP_DELALLOC 0x02 /* delayed allocation blocks */ +#define IOMAP_MAPPED 0x03 /* blocks allocated @blkno */ +#define IOMAP_UNWRITTEN 0x04 /* blocks allocated @blkno in unwritten state */ + +struct iomap { + sector_t blkno; /* first sector of mapping */ + loff_t offset; /* file offset of mapping, bytes */ + u64 length; /* length of mapping, bytes */ + int type; /* type of mapping */ +}; + struct export_operations { int (*encode_fh)(struct inode *inode, __u32 *fh, int *max_len, struct inode *parent); @@ -191,6 +205,13 @@ struct export_operations { struct dentry *child); struct dentry * (*get_parent)(struct dentry *child); int (*commit_metadata)(struct inode *inode); + + int (*get_uuid)(struct super_block *sb, u8 *buf, u32 *len, u64 *offset); + int (*map_blocks)(struct inode *inode, loff_t offset, + u64 len, struct iomap *iomap, + bool write, u32 *device_generation); + int (*commit_blocks)(struct inode *inode, struct iomap *iomaps, + int nr_iomaps, struct iattr *iattr); }; extern int exportfs_encode_inode_fh(struct inode *inode, struct fid *fid,