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 61429C433EF for ; Thu, 23 Dec 2021 23:52:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S245247AbhLWXwE (ORCPT ); Thu, 23 Dec 2021 18:52:04 -0500 Received: from mx0b-00082601.pphosted.com ([67.231.153.30]:64178 "EHLO mx0b-00082601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240979AbhLWXwD (ORCPT ); Thu, 23 Dec 2021 18:52:03 -0500 Received: from pps.filterd (m0109332.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.16.1.2/8.16.1.2) with ESMTP id 1BNAhaiE024174 for ; Thu, 23 Dec 2021 15:52:03 -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=STgvX2TE/FLG7fLpXpaJc2rBFNbDgB6WrxQIKn5fdk0=; b=HwX4jfSB+GZ+QWHsBq/I8vtMBLO/hbt2VDVWj99DyIlyFlINAC07a4htqsBoROBF/P+E PQItzsKeilo7wObPAMfsbAzy9CrSFM8HYEhGzbY0g2GH8Zg2eUK5hqNNAAk6Eo/Ig6yJ 9lbT5P2w6NhN+AEEEaYhootcvCauMlgWXCA= Received: from maileast.thefacebook.com ([163.114.130.16]) by mx0a-00082601.pphosted.com (PPS) with ESMTPS id 3d4qkumbr5-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Thu, 23 Dec 2021 15:52:03 -0800 Received: from twshared7572.23.frc3.facebook.com (2620:10d:c0a8:1b::d) by mail.thefacebook.com (2620:10d:c0a8:82::d) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.20; Thu, 23 Dec 2021 15:52:02 -0800 Received: by devvm225.atn0.facebook.com (Postfix, from userid 425415) id 7D69687DF611; Thu, 23 Dec 2021 15:51:55 -0800 (PST) From: Stefan Roesch To: , , CC: , , Subject: [PATCH v8 3/5] fs: split off do_getxattr from getxattr Date: Thu, 23 Dec 2021 15:51:21 -0800 Message-ID: <20211223235123.4092764-4-shr@fb.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20211223235123.4092764-1-shr@fb.com> References: <20211223235123.4092764-1-shr@fb.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-FB-Internal: Safe Content-Type: text/plain X-Proofpoint-GUID: gxrqjtOqnJyZK979ltUdLRMTl4pHNFna X-Proofpoint-ORIG-GUID: gxrqjtOqnJyZK979ltUdLRMTl4pHNFna X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.790,Hydra:6.0.425,FMLib:17.11.62.513 definitions=2021-12-23_04,2021-12-22_01,2021-12-02_01 X-Proofpoint-Spam-Details: rule=fb_outbound_notspam policy=fb_outbound score=0 clxscore=1015 impostorscore=0 lowpriorityscore=0 phishscore=0 mlxlogscore=636 malwarescore=0 mlxscore=0 priorityscore=1501 bulkscore=0 suspectscore=0 adultscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2110150000 definitions=main-2112230122 X-FB-Internal: deliver Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org This splits off do_getxattr function from the getxattr function. This will allow io_uring to call it from its io worker. Signed-off-by: Stefan Roesch Acked-by: Christian Brauner --- fs/internal.h | 6 ++++++ fs/xattr.c | 32 ++++++++++++++++++++------------ 2 files changed, 26 insertions(+), 12 deletions(-) diff --git a/fs/internal.h b/fs/internal.h index b07df1623de6..420d0283be12 100644 --- a/fs/internal.h +++ b/fs/internal.h @@ -220,6 +220,12 @@ struct xattr_ctx { }; =20 =20 +ssize_t do_getxattr(struct user_namespace *mnt_userns, + struct dentry *d, + const char *kname, + void __user *value, + size_t size); + int setxattr_copy(const char __user *name, struct xattr_ctx *ctx, void **xattr_val); int do_setxattr(struct user_namespace *mnt_userns, struct dentry *dentry= , diff --git a/fs/xattr.c b/fs/xattr.c index dcb4f0ff7e6e..51e305db426f 100644 --- a/fs/xattr.c +++ b/fs/xattr.c @@ -684,19 +684,12 @@ SYSCALL_DEFINE5(fsetxattr, int, fd, const char __us= er *, name, /* * Extended attribute GET operations */ -static ssize_t -getxattr(struct user_namespace *mnt_userns, struct dentry *d, - const char __user *name, void __user *value, size_t size) +ssize_t +do_getxattr(struct user_namespace *mnt_userns, struct dentry *d, + const char *kname, void __user *value, size_t size) { - ssize_t error; void *kvalue =3D NULL; - char kname[XATTR_NAME_MAX + 1]; - - error =3D strncpy_from_user(kname, name, sizeof(kname)); - if (error =3D=3D 0 || error =3D=3D sizeof(kname)) - error =3D -ERANGE; - if (error < 0) - return error; + ssize_t error; =20 if (size) { if (size > XATTR_SIZE_MAX) @@ -720,10 +713,25 @@ getxattr(struct user_namespace *mnt_userns, struct = dentry *d, } =20 kvfree(kvalue); - return error; } =20 +static ssize_t +getxattr(struct user_namespace *mnt_userns, struct dentry *d, + const char __user *name, void __user *value, size_t size) +{ + ssize_t error; + struct xattr_name kname; + + error =3D strncpy_from_user(kname.name, name, sizeof(kname.name)); + if (error =3D=3D 0 || error =3D=3D sizeof(kname.name)) + error =3D -ERANGE; + if (error < 0) + return error; + + return do_getxattr(mnt_userns, d, kname.name, value, size); +} + static ssize_t path_getxattr(const char __user *pathname, const char __user *name, void __user *value, size_t size, unsigned int lookup_flags) --=20 2.30.2