From patchwork Thu Dec 9 15:36:45 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeff Layton X-Patchwork-Id: 522540 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 36D5AC43219 for ; Thu, 9 Dec 2021 15:37:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240833AbhLIPlb (ORCPT ); Thu, 9 Dec 2021 10:41:31 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50072 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236210AbhLIPky (ORCPT ); Thu, 9 Dec 2021 10:40:54 -0500 Received: from sin.source.kernel.org (sin.source.kernel.org [IPv6:2604:1380:40e1:4800::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B7AF3C0698DB; Thu, 9 Dec 2021 07:37:15 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by sin.source.kernel.org (Postfix) with ESMTPS id 332F8CE267B; Thu, 9 Dec 2021 15:37:15 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 00807C341C7; Thu, 9 Dec 2021 15:37:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1639064233; bh=KYiVOHODD02NoARZI6yHrS0ORmVdb44LHKiVnsFKIcY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=f7kYaE0zArUs/mfBHqNbxxzo87GJmEB8cFt8GH6iyztrUd8bqHdI2LGjFxhSAptX/ uzkb2SNIvH/PT2SSC2rTkUP40MkNScxbLR3mfGO1meqVBhZ2l7m6qjQ8+6lS2x+jJQ BWZ/dGYlpMuVyb0/i3didHlOtInVB88lqeQBHtkUX1W1k9wfoJEpD967glmT66iDgG cbrICv4qdQDLEgTlBdplix9g+nFQ+xKFr4If7hA/I3HmTqwbzyPGHi2sIcJCrbV1P8 pMvkNmVGHMkdV58kIy+WdMrzrB0wESxae435/VvagBuIYP6vpSqnv7G22rxLAHfKdf q02/hPusBvhrg== From: Jeff Layton To: ceph-devel@vger.kernel.org Cc: linux-fscrypt@vger.kernel.org, linux-fsdevel@vger.kernel.org, Xiubo Li Subject: [PATCH 34/36] ceph: add __ceph_sync_read helper support Date: Thu, 9 Dec 2021 10:36:45 -0500 Message-Id: <20211209153647.58953-35-jlayton@kernel.org> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20211209153647.58953-1-jlayton@kernel.org> References: <20211209153647.58953-1-jlayton@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: ceph-devel@vger.kernel.org From: Xiubo Li Signed-off-by: Xiubo Li Signed-off-by: Jeff Layton --- fs/ceph/file.c | 34 ++++++++++++++++++++++------------ fs/ceph/super.h | 2 ++ 2 files changed, 24 insertions(+), 12 deletions(-) diff --git a/fs/ceph/file.c b/fs/ceph/file.c index 9030df3becdb..b42158c9aa16 100644 --- a/fs/ceph/file.c +++ b/fs/ceph/file.c @@ -882,21 +882,18 @@ enum { * If we get a short result from the OSD, check against i_size; we need to * only return a short read to the caller if we hit EOF. */ -static ssize_t ceph_sync_read(struct kiocb *iocb, struct iov_iter *to, - int *retry_op) +ssize_t __ceph_sync_read(struct inode *inode, loff_t *ki_pos, + struct iov_iter *to, int *retry_op) { - struct file *file = iocb->ki_filp; - struct inode *inode = file_inode(file); struct ceph_inode_info *ci = ceph_inode(inode); struct ceph_fs_client *fsc = ceph_inode_to_client(inode); struct ceph_osd_client *osdc = &fsc->client->osdc; ssize_t ret; - u64 off = iocb->ki_pos; + u64 off = *ki_pos; u64 len = iov_iter_count(to); u64 i_size = i_size_read(inode); - dout("sync_read on file %p %llu~%u %s\n", file, off, (unsigned)len, - (file->f_flags & O_DIRECT) ? "O_DIRECT" : ""); + dout("sync_read on inode %p %llu~%u\n", inode, *ki_pos, (unsigned)len); if (!len) return 0; @@ -998,14 +995,14 @@ static ssize_t ceph_sync_read(struct kiocb *iocb, struct iov_iter *to, break; } - if (off > iocb->ki_pos) { + if (off > *ki_pos) { if (off >= i_size) { *retry_op = CHECK_EOF; - ret = i_size - iocb->ki_pos; - iocb->ki_pos = i_size; + ret = i_size - *ki_pos; + *ki_pos = i_size; } else { - ret = off - iocb->ki_pos; - iocb->ki_pos = off; + ret = off - *ki_pos; + *ki_pos = off; } } @@ -1013,6 +1010,19 @@ static ssize_t ceph_sync_read(struct kiocb *iocb, struct iov_iter *to, return ret; } +static ssize_t ceph_sync_read(struct kiocb *iocb, struct iov_iter *to, + int *retry_op) +{ + struct file *file = iocb->ki_filp; + struct inode *inode = file_inode(file); + + dout("sync_read on file %p %llu~%u %s\n", file, iocb->ki_pos, + (unsigned)iov_iter_count(to), + (file->f_flags & O_DIRECT) ? "O_DIRECT" : ""); + + return __ceph_sync_read(inode, &iocb->ki_pos, to, retry_op); +} + struct ceph_aio_request { struct kiocb *iocb; size_t total_len; diff --git a/fs/ceph/super.h b/fs/ceph/super.h index c373f3ba7d55..d8f768495a17 100644 --- a/fs/ceph/super.h +++ b/fs/ceph/super.h @@ -1258,6 +1258,8 @@ extern int ceph_renew_caps(struct inode *inode, int fmode); extern int ceph_open(struct inode *inode, struct file *file); extern int ceph_atomic_open(struct inode *dir, struct dentry *dentry, struct file *file, unsigned flags, umode_t mode); +extern ssize_t __ceph_sync_read(struct inode *inode, loff_t *ki_pos, + struct iov_iter *to, int *retry_op); extern int ceph_release(struct inode *inode, struct file *filp); extern void ceph_fill_inline_data(struct inode *inode, struct page *locked_page, char *data, size_t len);