From patchwork Sat Nov 27 05:55:32 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Roesch X-Patchwork-Id: 12642127 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 78688C433FE for ; Sat, 27 Nov 2021 05:58:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1349865AbhK0GBK (ORCPT ); Sat, 27 Nov 2021 01:01:10 -0500 Received: from mx0b-00082601.pphosted.com ([67.231.153.30]:34974 "EHLO mx0b-00082601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238036AbhK0F7G (ORCPT ); Sat, 27 Nov 2021 00:59:06 -0500 Received: from pps.filterd (m0148460.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.16.1.2/8.16.1.2) with SMTP id 1AR2xkka018917 for ; Fri, 26 Nov 2021 21:55:52 -0800 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fb.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding : content-type; s=facebook; bh=/u31pn93VuoRNh18SkC9coZW1dmaq15iiIMXz3oSgm0=; b=bGhCohzzLOor5q5ODjJzO46kXOi7d5wuu0DuHI8HA9EzjAAuZlydGncct4Lt0B3u0BTM luH3wIo6vY2X4hlfX2My9Q5MDdA9dUwAWwFseETaSpEjE6RBeKf3vYp9z5EPH+vkOlUy 43EJxoMPe7v6lN5APD5jkB3caF1DC57O/MY= Received: from maileast.thefacebook.com ([163.114.130.16]) by mx0a-00082601.pphosted.com with ESMTP id 3ckcc3rg0n-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Fri, 26 Nov 2021 21:55:52 -0800 Received: from intmgw001.37.frc1.facebook.com (2620:10d:c0a8:1b::d) by mail.thefacebook.com (2620:10d:c0a8:83::4) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.20; Fri, 26 Nov 2021 21:55:51 -0800 Received: by devvm225.atn0.facebook.com (Postfix, from userid 425415) id 4D8DA6F661A4; Fri, 26 Nov 2021 21:55:41 -0800 (PST) From: Stefan Roesch To: , CC: Subject: [PATCH v4 1/3] fs: add parameter use_fpos to iterate_dir function Date: Fri, 26 Nov 2021 21:55:32 -0800 Message-ID: <20211127055535.2976876-2-shr@fb.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20211127055535.2976876-1-shr@fb.com> References: <20211127055535.2976876-1-shr@fb.com> MIME-Version: 1.0 X-FB-Internal: Safe X-FB-Source: Intern X-Proofpoint-GUID: 8ALQ7D1C5N344vdjEEc07WvSJ-_kARQ_ X-Proofpoint-ORIG-GUID: 8ALQ7D1C5N344vdjEEc07WvSJ-_kARQ_ X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.790,Hydra:6.0.425,FMLib:17.0.607.475 definitions=2021-11-27_02,2021-11-25_02,2020-04-07_01 X-Proofpoint-Spam-Details: rule=fb_default_notspam policy=fb_default score=0 clxscore=1015 impostorscore=0 malwarescore=0 mlxscore=0 mlxlogscore=999 priorityscore=1501 adultscore=0 bulkscore=0 phishscore=0 spamscore=0 suspectscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2110150000 definitions=main-2111270031 X-FB-Internal: deliver Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org This adds the use_fpos parameter to the iterate_dir function. If use_fpos is true it uses the file position in the file structure (existing behavior). If use_fpos is false, it uses the pos in the context structure. This change is required to support getdents in io_uring. Signed-off-by: Stefan Roesch --- fs/readdir.c | 25 +++++++++++++++++++++---- 1 file changed, 21 insertions(+), 4 deletions(-) diff --git a/fs/readdir.c b/fs/readdir.c index 09e8ed7d4161..e9c197edf73a 100644 --- a/fs/readdir.c +++ b/fs/readdir.c @@ -36,8 +36,15 @@ unsafe_copy_to_user(dst, src, len, label); \ } while (0) - -int iterate_dir(struct file *file, struct dir_context *ctx) +/** + * do_iterate_dir - iterate over directory + * @file : pointer to file struct of directory + * @ctx : pointer to directory ctx structure + * @use_fpos: true : use file offset + * false: use pos in ctx structure + */ +static int do_iterate_dir(struct file *file, struct dir_context *ctx, + bool use_fpos) { struct inode *inode = file_inode(file); bool shared = false; @@ -60,12 +67,17 @@ int iterate_dir(struct file *file, struct dir_context *ctx) res = -ENOENT; if (!IS_DEADDIR(inode)) { - ctx->pos = file->f_pos; + if (use_fpos) + ctx->pos = file->f_pos; + if (shared) res = file->f_op->iterate_shared(file, ctx); else res = file->f_op->iterate(file, ctx); - file->f_pos = ctx->pos; + + if (use_fpos) + file->f_pos = ctx->pos; + fsnotify_access(file); file_accessed(file); } @@ -76,6 +88,11 @@ int iterate_dir(struct file *file, struct dir_context *ctx) out: return res; } + +int iterate_dir(struct file *file, struct dir_context *ctx) +{ + return do_iterate_dir(file, ctx, true); +} EXPORT_SYMBOL(iterate_dir); /*