From patchwork Fri Apr 29 20:42:10 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Schumaker, Anna" X-Patchwork-Id: 8985331 Return-Path: X-Original-To: patchwork-linux-nfs@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id AE5299F1D3 for ; Fri, 29 Apr 2016 20:42:25 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id BF98E201B4 for ; Fri, 29 Apr 2016 20:42:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 98E5C200E0 for ; Fri, 29 Apr 2016 20:42:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752777AbcD2UmW (ORCPT ); Fri, 29 Apr 2016 16:42:22 -0400 Received: from mx141.netapp.com ([216.240.21.12]:60342 "EHLO mx141.netapp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752379AbcD2UmW (ORCPT ); Fri, 29 Apr 2016 16:42:22 -0400 X-IronPort-AV: E=Sophos;i="5.24,553,1455004800"; d="scan'208";a="115743487" Received: from vmwexchts01-prd.hq.netapp.com ([10.122.105.12]) by mx141-out.netapp.com with ESMTP; 29 Apr 2016 13:42:21 -0700 Received: from smtp2.corp.netapp.com (10.57.159.114) by VMWEXCHTS01-PRD.hq.netapp.com (10.122.105.12) with Microsoft SMTP Server id 15.0.1156.6; Fri, 29 Apr 2016 13:42:19 -0700 Received: from davros.com ([10.63.236.133]) by smtp2.corp.netapp.com (8.13.1/8.13.1/NTAP-1.6) with ESMTP id u3TKgGAq011389; Fri, 29 Apr 2016 13:42:19 -0700 (PDT) From: Anna Schumaker To: , , , Subject: [PATCH v4 1/3] NFS: Add nfs_commit_file() Date: Fri, 29 Apr 2016 16:42:10 -0400 Message-ID: <1461962533-26534-2-git-send-email-Anna.Schumaker@Netapp.com> X-Mailer: git-send-email 2.8.0 In-Reply-To: <1461962533-26534-1-git-send-email-Anna.Schumaker@Netapp.com> References: <1461962533-26534-1-git-send-email-Anna.Schumaker@Netapp.com> MIME-Version: 1.0 Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org X-Spam-Status: No, score=-7.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, 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 Copy will use this to set up a commit request for a generic range. I don't want to allocate a new pagecache entry for the file, so I needed to change parts of the commit path to handle requests with a null wb_page. Signed-off-by: Anna Schumaker --- Please let me know if there is a better way to do this! --- fs/nfs/internal.h | 1 + fs/nfs/pagelist.c | 6 ++++-- fs/nfs/write.c | 41 +++++++++++++++++++++++++++++++++++++---- 3 files changed, 42 insertions(+), 6 deletions(-) diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index f1d1d2c..5154fa6 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -477,6 +477,7 @@ void nfs_mark_request_commit(struct nfs_page *req, u32 ds_commit_idx); int nfs_write_need_commit(struct nfs_pgio_header *); void nfs_writeback_update_inode(struct nfs_pgio_header *hdr); +int nfs_commit_file(struct file *file, struct nfs_write_verifier *verf); int nfs_generic_commit_list(struct inode *inode, struct list_head *head, int how, struct nfs_commit_info *cinfo); void nfs_retry_commit(struct list_head *page_list, diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c index 1f6db42..174dd4c 100644 --- a/fs/nfs/pagelist.c +++ b/fs/nfs/pagelist.c @@ -341,8 +341,10 @@ nfs_create_request(struct nfs_open_context *ctx, struct page *page, * long write-back delay. This will be adjusted in * update_nfs_request below if the region is not locked. */ req->wb_page = page; - req->wb_index = page_file_index(page); - get_page(page); + if (page) { + req->wb_index = page_file_index(page); + get_page(page); + } req->wb_offset = offset; req->wb_pgbase = offset; req->wb_bytes = count; diff --git a/fs/nfs/write.c b/fs/nfs/write.c index 5f4fd53..b5e18f2 100644 --- a/fs/nfs/write.c +++ b/fs/nfs/write.c @@ -737,7 +737,7 @@ static void nfs_inode_remove_request(struct nfs_page *req) head = req->wb_head; spin_lock(&inode->i_lock); - if (likely(!PageSwapCache(head->wb_page))) { + if (likely(head->wb_page && !PageSwapCache(head->wb_page))) { set_page_private(head->wb_page, 0); ClearPagePrivate(head->wb_page); smp_mb__after_atomic(); @@ -759,7 +759,8 @@ static void nfs_inode_remove_request(struct nfs_page *req) static void nfs_mark_request_dirty(struct nfs_page *req) { - __set_page_dirty_nobuffers(req->wb_page); + if (req->wb_page) + __set_page_dirty_nobuffers(req->wb_page); } /* @@ -835,7 +836,8 @@ nfs_request_add_commit_list(struct nfs_page *req, struct nfs_commit_info *cinfo) spin_lock(cinfo->lock); nfs_request_add_commit_list_locked(req, &cinfo->mds->list, cinfo); spin_unlock(cinfo->lock); - nfs_mark_page_unstable(req->wb_page, cinfo); + if (req->wb_page) + nfs_mark_page_unstable(req->wb_page, cinfo); } EXPORT_SYMBOL_GPL(nfs_request_add_commit_list); @@ -1724,6 +1726,36 @@ nfs_commit_list(struct inode *inode, struct list_head *head, int how, return -ENOMEM; } +int nfs_commit_file(struct file *file, struct nfs_write_verifier *verf) +{ + struct inode *inode = file_inode(file); + struct nfs_open_context *open; + struct nfs_commit_info cinfo; + struct nfs_page *req; + int ret; + + open = get_nfs_open_context(nfs_file_open_context(file)); + req = nfs_create_request(open, NULL, NULL, 0, i_size_read(inode)); + if (!req) { + ret = -ENOMEM; + goto out_put; + } + + nfs_init_cinfo_from_inode(&cinfo, inode); + + memcpy(&req->wb_verf, verf, sizeof(struct nfs_write_verifier)); + nfs_request_add_commit_list(req, &cinfo); + ret = nfs_commit_inode(inode, FLUSH_SYNC); + if (ret > 0) + ret = 0; + + nfs_free_request(req); +out_put: + put_nfs_open_context(open); + return ret; +} +EXPORT_SYMBOL_GPL(nfs_commit_file); + /* * COMMIT call returned */ @@ -1748,7 +1780,8 @@ static void nfs_commit_release_pages(struct nfs_commit_data *data) while (!list_empty(&data->pages)) { req = nfs_list_entry(data->pages.next); nfs_list_remove_request(req); - nfs_clear_page_commit(req->wb_page); + if (req->wb_page) + nfs_clear_page_commit(req->wb_page); dprintk("NFS: commit (%s/%llu %d@%lld)", req->wb_context->dentry->d_sb->s_id,