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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 30B06C433FE for ; Tue, 23 Nov 2021 18:10:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239700AbhKWSNb (ORCPT ); Tue, 23 Nov 2021 13:13:31 -0500 Received: from mx0b-00082601.pphosted.com ([67.231.153.30]:10650 "EHLO mx0b-00082601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239690AbhKWSNb (ORCPT ); Tue, 23 Nov 2021 13:13:31 -0500 Received: from pps.filterd (m0109331.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.16.1.2/8.16.1.2) with SMTP id 1AND8UNs024576 for ; Tue, 23 Nov 2021 10:10:22 -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=F2BKqoEO+e9sn1K58C/k0qmyAVxy4W22ZCzTFZhQazE=; b=nX2l/Mh32yoD2U0TQs1FU3LXel4z/BUqAhaUlHrhgrf5GcVqllGCzC7PjMX9JCDjthZn fqACnulLhUTGNI/V0VsvyyPw+XOCKoxJ8F+UawKOB/+4/v3XM652T5aApPQqPgg6hXZo gyY5Vph8crpxDHxtQA/8TCLHheaNwNR7RKQ= Received: from maileast.thefacebook.com ([163.114.130.16]) by mx0a-00082601.pphosted.com with ESMTP id 3ch0wxaa46-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Tue, 23 Nov 2021 10:10:22 -0800 Received: from intmgw001.25.frc3.facebook.com (2620:10d:c0a8:1b::d) by mail.thefacebook.com (2620:10d:c0a8:82::c) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.14; Tue, 23 Nov 2021 10:10:16 -0800 Received: by devvm225.atn0.facebook.com (Postfix, from userid 425415) id 0C5046CCDB41; Tue, 23 Nov 2021 10:10:13 -0800 (PST) From: Stefan Roesch To: , CC: Subject: [PATCH v1 1/3] fs: add parameter use_fpos to iterate_dir function Date: Tue, 23 Nov 2021 10:10:08 -0800 Message-ID: <20211123181010.1607630-2-shr@fb.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20211123181010.1607630-1-shr@fb.com> References: <20211123181010.1607630-1-shr@fb.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-FB-Internal: Safe Content-Type: text/plain X-FB-Source: Intern X-Proofpoint-GUID: 3JTrty9g76GyR0YVFCPQXo_5cH5swF7N X-Proofpoint-ORIG-GUID: 3JTrty9g76GyR0YVFCPQXo_5cH5swF7N 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=2021-11-23_06,2021-11-23_01,2020-04-07_01 X-Proofpoint-Spam-Details: rule=fb_default_notspam policy=fb_default score=0 mlxlogscore=960 spamscore=0 suspectscore=0 impostorscore=0 clxscore=1015 priorityscore=1501 malwarescore=0 phishscore=0 lowpriorityscore=0 mlxscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2110150000 definitions=main-2111230089 X-FB-Internal: deliver Precedence: bulk List-ID: X-Mailing-List: io-uring@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/exportfs/expfs.c | 2 +- fs/nfsd/nfs4recover.c | 2 +- fs/nfsd/vfs.c | 2 +- fs/overlayfs/readdir.c | 6 +++--- fs/readdir.c | 28 ++++++++++++++++++++-------- include/linux/fs.h | 2 +- 6 files changed, 27 insertions(+), 15 deletions(-) diff --git a/fs/exportfs/expfs.c b/fs/exportfs/expfs.c index 0106eba46d5a..0f303356f907 100644 --- a/fs/exportfs/expfs.c +++ b/fs/exportfs/expfs.c @@ -323,7 +323,7 @@ static int get_name(const struct path *path, char *na= me, struct dentry *child) while (1) { int old_seq =3D buffer.sequence; =20 - error =3D iterate_dir(file, &buffer.ctx); + error =3D iterate_dir(file, &buffer.ctx, true); if (buffer.found) { error =3D 0; break; diff --git a/fs/nfsd/nfs4recover.c b/fs/nfsd/nfs4recover.c index 6fedc49726bf..013b1a3530c9 100644 --- a/fs/nfsd/nfs4recover.c +++ b/fs/nfsd/nfs4recover.c @@ -307,7 +307,7 @@ nfsd4_list_rec_dir(recdir_func *f, struct nfsd_net *n= n) return status; } =20 - status =3D iterate_dir(nn->rec_file, &ctx.ctx); + status =3D iterate_dir(nn->rec_file, &ctx.ctx, true); inode_lock_nested(d_inode(dir), I_MUTEX_PARENT); =20 list_for_each_entry_safe(entry, tmp, &ctx.names, list) { diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c index c99857689e2c..cd7a7d783fa7 100644 --- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -1980,7 +1980,7 @@ static __be32 nfsd_buffered_readdir(struct file *fi= le, struct svc_fh *fhp, buf.used =3D 0; buf.full =3D 0; =20 - host_err =3D iterate_dir(file, &buf.ctx); + host_err =3D iterate_dir(file, &buf.ctx, true); if (buf.full) host_err =3D 0; =20 diff --git a/fs/overlayfs/readdir.c b/fs/overlayfs/readdir.c index 150fdf3bc68d..089150315942 100644 --- a/fs/overlayfs/readdir.c +++ b/fs/overlayfs/readdir.c @@ -306,7 +306,7 @@ static inline int ovl_dir_read(struct path *realpath, do { rdd->count =3D 0; rdd->err =3D 0; - err =3D iterate_dir(realfile, &rdd->ctx); + err =3D iterate_dir(realfile, &rdd->ctx, true); if (err >=3D 0) err =3D rdd->err; } while (!err && rdd->count); @@ -722,7 +722,7 @@ static int ovl_iterate_real(struct file *file, struct= dir_context *ctx) return PTR_ERR(rdt.cache); } =20 - err =3D iterate_dir(od->realfile, &rdt.ctx); + err =3D iterate_dir(od->realfile, &rdt.ctx, true); ctx->pos =3D rdt.ctx.pos; =20 return err; @@ -753,7 +753,7 @@ static int ovl_iterate(struct file *file, struct dir_= context *ctx) OVL_TYPE_MERGE(ovl_path_type(dentry->d_parent))))) { err =3D ovl_iterate_real(file, ctx); } else { - err =3D iterate_dir(od->realfile, ctx); + err =3D iterate_dir(od->realfile, ctx, true); } goto out; } diff --git a/fs/readdir.c b/fs/readdir.c index 09e8ed7d4161..8ea5b5f45a78 100644 --- a/fs/readdir.c +++ b/fs/readdir.c @@ -21,6 +21,7 @@ #include #include #include +#include "internal.h" =20 #include =20 @@ -36,8 +37,14 @@ unsafe_copy_to_user(dst, src, len, label); \ } while (0) =20 - -int iterate_dir(struct file *file, struct dir_context *ctx) +/** + * 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 + */ +int iterate_dir(struct file *file, struct dir_context *ctx, bool use_fpo= s) { struct inode *inode =3D file_inode(file); bool shared =3D false; @@ -60,12 +67,17 @@ int iterate_dir(struct file *file, struct dir_context= *ctx) =20 res =3D -ENOENT; if (!IS_DEADDIR(inode)) { - ctx->pos =3D file->f_pos; + if (use_fpos) + ctx->pos =3D file->f_pos; + if (shared) res =3D file->f_op->iterate_shared(file, ctx); else res =3D file->f_op->iterate(file, ctx); - file->f_pos =3D ctx->pos; + + if (use_fpos) + file->f_pos =3D ctx->pos; + fsnotify_access(file); file_accessed(file); } @@ -190,7 +202,7 @@ SYSCALL_DEFINE3(old_readdir, unsigned int, fd, if (!f.file) return -EBADF; =20 - error =3D iterate_dir(f.file, &buf.ctx); + error =3D iterate_dir(f.file, &buf.ctx, true); if (buf.result) error =3D buf.result; =20 @@ -283,7 +295,7 @@ SYSCALL_DEFINE3(getdents, unsigned int, fd, if (!f.file) return -EBADF; =20 - error =3D iterate_dir(f.file, &buf.ctx); + error =3D iterate_dir(f.file, &buf.ctx, true); if (error >=3D 0) error =3D buf.error; if (buf.prev_reclen) { @@ -448,7 +460,7 @@ COMPAT_SYSCALL_DEFINE3(old_readdir, unsigned int, fd, if (!f.file) return -EBADF; =20 - error =3D iterate_dir(f.file, &buf.ctx); + error =3D iterate_dir(f.file, &buf.ctx, true); if (buf.result) error =3D buf.result; =20 @@ -534,7 +546,7 @@ COMPAT_SYSCALL_DEFINE3(getdents, unsigned int, fd, if (!f.file) return -EBADF; =20 - error =3D iterate_dir(f.file, &buf.ctx); + error =3D iterate_dir(f.file, &buf.ctx, true); if (error >=3D 0) error =3D buf.error; if (buf.prev_reclen) { diff --git a/include/linux/fs.h b/include/linux/fs.h index 1cb616fc1105..ba4f49c4ac41 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -3343,7 +3343,7 @@ const char *simple_get_link(struct dentry *, struct= inode *, struct delayed_call *); extern const struct inode_operations simple_symlink_inode_operations; =20 -extern int iterate_dir(struct file *, struct dir_context *); +extern int iterate_dir(struct file *file, struct dir_context *ctx, bool = use_fpos); =20 int vfs_fstatat(int dfd, const char __user *filename, struct kstat *stat= , int flags); --=20 2.30.2