From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 43D4DC433FE for ; Sat, 18 Sep 2021 01:31:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2B44F61241 for ; Sat, 18 Sep 2021 01:31:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235807AbhIRBca (ORCPT ); Fri, 17 Sep 2021 21:32:30 -0400 Received: from mail.kernel.org ([198.145.29.99]:37642 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235000AbhIRBc3 (ORCPT ); Fri, 17 Sep 2021 21:32:29 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 02AC76112E; Sat, 18 Sep 2021 01:31:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1631928667; bh=xuiaU4G94JZ0dj6J2nwdrhrGZ7owpzE72Ua/872ZRe4=; h=Subject:From:To:Cc:Date:In-Reply-To:References:From; b=kvWknvJxz/MOdA9ATXRi0S8rMr/0nfxuhTxHByrYJrTPYBaEJjfb/MCKD9KmvuLLF jY1zpRlpKBIjf+XDrpa4sjvur63liF6nAgzpSC7VGKr9IWs8pOGcEKpiIIjnGiUllo aXIx+qbbOmCOzVXEmsrrZZVPPTzy7SJfCpMbXgxSOnFUkp5wlSMJHe1cs+2JzGQpju Vq++B8Bkue0K22dgzhJhwEahvRT53fBQBBsih9NGge4kGMjsChdC+GJkZECQxSva0h OiGrTEnj8E1NkGD4lDxjInnyDKAwb27wMkwQ4sh1mLuVwIlHJQYWS7BJFFoaZmLW0I SVjPkGCtS1g5g== Subject: [PATCH 4/5] xfs: implement FALLOC_FL_ZEROINIT_RANGE From: "Darrick J. Wong" To: djwong@kernel.org, jane.chu@oracle.com Cc: linux-xfs@vger.kernel.org, hch@infradead.org, dan.j.williams@intel.com, linux-fsdevel@vger.kernel.org Date: Fri, 17 Sep 2021 18:31:06 -0700 Message-ID: <163192866672.417973.1497612280233084622.stgit@magnolia> In-Reply-To: <163192864476.417973.143014658064006895.stgit@magnolia> References: <163192864476.417973.143014658064006895.stgit@magnolia> User-Agent: StGit/0.19 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org From: Darrick J. Wong Implement this new fallocate mode so that persistent memory users can, upon receipt of a pmem poison notification, cause the pmem to be reinitialized to a known value (zero) and clear any hardware poison state that might be lurking. Signed-off-by: Darrick J. Wong --- fs/xfs/xfs_bmap_util.c | 22 ++++++++++++++++++++++ fs/xfs/xfs_bmap_util.h | 2 ++ fs/xfs/xfs_file.c | 11 ++++++++--- fs/xfs/xfs_trace.h | 1 + 4 files changed, 33 insertions(+), 3 deletions(-) diff --git a/fs/xfs/xfs_bmap_util.c b/fs/xfs/xfs_bmap_util.c index 73a36b7be3bd..319e79bb7fd8 100644 --- a/fs/xfs/xfs_bmap_util.c +++ b/fs/xfs/xfs_bmap_util.c @@ -956,6 +956,28 @@ xfs_flush_unmap_range( return 0; } +int +xfs_file_zeroinit_space( + struct xfs_inode *ip, + xfs_off_t offset, + xfs_off_t len) +{ + struct inode *inode = VFS_I(ip); + int error; + + trace_xfs_zeroinit_file_space(ip, offset, len); + + if (IS_DAX(inode)) + error = dax_zeroinit_range(inode, offset, len, + &xfs_read_iomap_ops); + else + error = iomap_zeroout_range(inode, offset, len, + &xfs_read_iomap_ops); + if (error == -ECANCELED) + return -EOPNOTSUPP; + return error; +} + int xfs_free_file_space( struct xfs_inode *ip, diff --git a/fs/xfs/xfs_bmap_util.h b/fs/xfs/xfs_bmap_util.h index 9f993168b55b..7bb425d0876c 100644 --- a/fs/xfs/xfs_bmap_util.h +++ b/fs/xfs/xfs_bmap_util.h @@ -61,6 +61,8 @@ int xfs_collapse_file_space(struct xfs_inode *, xfs_off_t offset, xfs_off_t len); int xfs_insert_file_space(struct xfs_inode *, xfs_off_t offset, xfs_off_t len); +int xfs_file_zeroinit_space(struct xfs_inode *ip, xfs_off_t offset, + xfs_off_t length); /* EOF block manipulation functions */ bool xfs_can_free_eofblocks(struct xfs_inode *ip, bool force); diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c index 7aa943edfc02..886e819efa3b 100644 --- a/fs/xfs/xfs_file.c +++ b/fs/xfs/xfs_file.c @@ -899,7 +899,8 @@ xfs_break_layouts( #define XFS_FALLOC_FL_SUPPORTED \ (FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE | \ FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_ZERO_RANGE | \ - FALLOC_FL_INSERT_RANGE | FALLOC_FL_UNSHARE_RANGE) + FALLOC_FL_INSERT_RANGE | FALLOC_FL_UNSHARE_RANGE | \ + FALLOC_FL_ZEROINIT_RANGE) STATIC long xfs_file_fallocate( @@ -950,13 +951,17 @@ xfs_file_fallocate( * handled at the right time by xfs_prepare_shift(). */ if (mode & (FALLOC_FL_PUNCH_HOLE | FALLOC_FL_ZERO_RANGE | - FALLOC_FL_COLLAPSE_RANGE)) { + FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_ZEROINIT_RANGE)) { error = xfs_flush_unmap_range(ip, offset, len); if (error) goto out_unlock; } - if (mode & FALLOC_FL_PUNCH_HOLE) { + if (mode & FALLOC_FL_ZEROINIT_RANGE) { + error = xfs_file_zeroinit_space(ip, offset, len); + if (error) + goto out_unlock; + } else if (mode & FALLOC_FL_PUNCH_HOLE) { error = xfs_free_file_space(ip, offset, len); if (error) goto out_unlock; diff --git a/fs/xfs/xfs_trace.h b/fs/xfs/xfs_trace.h index 4a8076ef8cb4..eccad0a5c40f 100644 --- a/fs/xfs/xfs_trace.h +++ b/fs/xfs/xfs_trace.h @@ -1534,6 +1534,7 @@ DEFINE_SIMPLE_IO_EVENT(xfs_zero_eof); DEFINE_SIMPLE_IO_EVENT(xfs_end_io_direct_write); DEFINE_SIMPLE_IO_EVENT(xfs_end_io_direct_write_unwritten); DEFINE_SIMPLE_IO_EVENT(xfs_end_io_direct_write_append); +DEFINE_SIMPLE_IO_EVENT(xfs_zeroinit_file_space); DECLARE_EVENT_CLASS(xfs_itrunc_class, TP_PROTO(struct xfs_inode *ip, xfs_fsize_t new_size),