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=-9.8 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 9CC57C433E1 for ; Fri, 26 Jun 2020 07:59:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6C75220CC7 for ; Fri, 26 Jun 2020 07:59:04 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="UmowHKu8" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728933AbgFZH7C (ORCPT ); Fri, 26 Jun 2020 03:59:02 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39576 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728890AbgFZH67 (ORCPT ); Fri, 26 Jun 2020 03:58:59 -0400 Received: from casper.infradead.org (unknown [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 986A9C08C5DB; Fri, 26 Jun 2020 00:58:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=JhVBSga62gHEgz4HGi54NKYgqov3EJL/ffRCuH+2YLw=; b=UmowHKu8q4WVgCjF8Ze08+GvJg pgP8MuO77AOQSlGhimYAgA3nuE1UuBWOjyaue8DEQLcH8hwwkvYmDfmIc+Qdd/xtj6K6sr5gh7PBS MKYioGH1Pmx/dTR9N8PsiBGV52JEEUzOzoXdhvnAZiOWRcvpe9mupj9qHZ2TU/ErUk/mX5Jltyt6n dvlh+SUAgiHQn2FKvRP+c8AEp9RHR0/36vKNRGlWuzgCykK99OeeIG0C94F0j1n+C/D0UOpAC4Ajm vMkanOFeZu5IF5twzA8jGM/nu0XVA9DB+t+XjJeBEDzMBNCwRK+I3eWv5kg3+yxPp8KMxFzubeTAG s6s571SQ==; Received: from [2001:4bb8:184:76e3:2b32:1123:bea8:6121] (helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1jojFv-0006yc-W9; Fri, 26 Jun 2020 07:58:40 +0000 From: Christoph Hellwig To: Al Viro , Linus Torvalds Cc: Luis Chamberlain , Matthew Wilcox , Kees Cook , Iurii Zaikin , linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org Subject: [PATCH 1/9] fs: refactor new_sync_read Date: Fri, 26 Jun 2020 09:58:28 +0200 Message-Id: <20200626075836.1998185-2-hch@lst.de> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200626075836.1998185-1-hch@lst.de> References: <20200626075836.1998185-1-hch@lst.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Pass the read_iter method as a parameter and mark the function non-static. This allows reusing it for additional callsites e.g. in procfs. Signed-off-by: Christoph Hellwig --- fs/read_write.c | 8 +++++--- include/linux/fs.h | 2 ++ 2 files changed, 7 insertions(+), 3 deletions(-) diff --git a/fs/read_write.c b/fs/read_write.c index e7f36b15683049..e765c95ff3440d 100644 --- a/fs/read_write.c +++ b/fs/read_write.c @@ -401,7 +401,8 @@ int rw_verify_area(int read_write, struct file *file, const loff_t *ppos, size_t read_write == READ ? MAY_READ : MAY_WRITE); } -static ssize_t new_sync_read(struct file *filp, char __user *buf, size_t len, loff_t *ppos) +ssize_t iter_read(struct file *filp, char __user *buf, size_t len, loff_t *ppos, + ssize_t (*cb)(struct kiocb *iocb, struct iov_iter *iter)) { struct iovec iov = { .iov_base = buf, .iov_len = len }; struct kiocb kiocb; @@ -412,7 +413,7 @@ static ssize_t new_sync_read(struct file *filp, char __user *buf, size_t len, lo kiocb.ki_pos = (ppos ? *ppos : 0); iov_iter_init(&iter, READ, &iov, 1, len); - ret = call_read_iter(filp, &kiocb, &iter); + ret = cb(&kiocb, &iter); BUG_ON(ret == -EIOCBQUEUED); if (ppos) *ppos = kiocb.ki_pos; @@ -488,7 +489,8 @@ ssize_t vfs_read(struct file *file, char __user *buf, size_t count, loff_t *pos) if (file->f_op->read) ret = file->f_op->read(file, buf, count, pos); else if (file->f_op->read_iter) - ret = new_sync_read(file, buf, count, pos); + ret = iter_read(file, buf, count, pos, + file->f_op->read_iter); else ret = -EINVAL; if (ret > 0) { diff --git a/include/linux/fs.h b/include/linux/fs.h index fac6aead402a98..b9b2ee31ef9bf1 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1916,6 +1916,8 @@ ssize_t rw_copy_check_uvector(int type, const struct iovec __user * uvector, unsigned long nr_segs, unsigned long fast_segs, struct iovec *fast_pointer, struct iovec **ret_pointer); +ssize_t iter_read(struct file *filp, char __user *buf, size_t len, loff_t *ppos, + ssize_t (*cb)(struct kiocb *iocb, struct iov_iter *iter)); extern ssize_t vfs_read(struct file *, char __user *, size_t, loff_t *); extern ssize_t vfs_write(struct file *, const char __user *, size_t, loff_t *); -- 2.26.2