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 DD0ADC433FE for ; Wed, 29 Dec 2021 20:32:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229893AbhL2Ucv (ORCPT ); Wed, 29 Dec 2021 15:32:51 -0500 Received: from mx0a-00082601.pphosted.com ([67.231.145.42]:5676 "EHLO mx0a-00082601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231773AbhL2Ucs (ORCPT ); Wed, 29 Dec 2021 15:32:48 -0500 Received: from pps.filterd (m0109334.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.16.1.2/8.16.1.2) with ESMTP id 1BTHDvBl019782 for ; Wed, 29 Dec 2021 12:32:48 -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=Fe4Bl/guYsrziQF+/f1hwBwURZ0w+FJsaDv1L7ooL6U=; b=LLFoeczhNzXL+T6kSmKxG8pq/nTtTCXHd/31zg0C0r0AQynttkurjfy3MWvpuXbxbIW5 TrSF73nTf+uQEZnD2auPPLCRSXa953XDUkEB6S+8tfX2oeiSkjEb2x5KLNxx9S7AVT+F K0i8brQvmB1BQs8FDwwPrK4ZPKiH52BK2T8= Received: from maileast.thefacebook.com ([163.114.130.16]) by mx0a-00082601.pphosted.com (PPS) with ESMTPS id 3d883eet63-3 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Wed, 29 Dec 2021 12:32:48 -0800 Received: from twshared21922.14.frc2.facebook.com (2620:10d:c0a8:1b::d) by mail.thefacebook.com (2620:10d:c0a8:83::7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.20; Wed, 29 Dec 2021 12:32:42 -0800 Received: by devvm225.atn0.facebook.com (Postfix, from userid 425415) id 808878C20DF8; Wed, 29 Dec 2021 12:30:04 -0800 (PST) From: Stefan Roesch To: , , CC: , , Subject: [PATCH v10 4/5] io_uring: add fsetxattr and setxattr support Date: Wed, 29 Dec 2021 12:30:01 -0800 Message-ID: <20211229203002.4110839-5-shr@fb.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20211229203002.4110839-1-shr@fb.com> References: <20211229203002.4110839-1-shr@fb.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-FB-Internal: Safe Content-Type: text/plain X-Proofpoint-ORIG-GUID: PXqaKz3HqfWaQJNaD47KnUQaD5V5xZnv X-Proofpoint-GUID: PXqaKz3HqfWaQJNaD47KnUQaD5V5xZnv 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=2021-12-29_06,2021-12-29_01,2021-12-02_01 X-Proofpoint-Spam-Details: rule=fb_outbound_notspam policy=fb_outbound score=0 impostorscore=0 mlxscore=0 priorityscore=1501 adultscore=0 clxscore=1015 suspectscore=0 malwarescore=0 bulkscore=0 lowpriorityscore=0 phishscore=0 mlxlogscore=999 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2110150000 definitions=main-2112290111 X-FB-Internal: deliver Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org This adds support to io_uring for the fsetxattr and setxattr API. Signed-off-by: Stefan Roesch Acked-by: Christian Brauner --- fs/io_uring.c | 164 ++++++++++++++++++++++++++++++++++ include/uapi/linux/io_uring.h | 6 +- 2 files changed, 169 insertions(+), 1 deletion(-) diff --git a/fs/io_uring.c b/fs/io_uring.c index c8258c784116..f1b325dd81d5 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -82,6 +82,7 @@ #include #include #include +#include =20 #define CREATE_TRACE_POINTS #include @@ -726,6 +727,12 @@ struct io_async_rw { struct wait_page_queue wpq; }; =20 +struct io_xattr { + struct file *file; + struct xattr_ctx ctx; + struct filename *filename; +}; + enum { REQ_F_FIXED_FILE_BIT =3D IOSQE_FIXED_FILE_BIT, REQ_F_IO_DRAIN_BIT =3D IOSQE_IO_DRAIN_BIT, @@ -866,6 +873,7 @@ struct io_kiocb { struct io_symlink symlink; struct io_hardlink hardlink; struct io_getdents getdents; + struct io_xattr xattr; }; =20 u8 opcode; @@ -1118,6 +1126,10 @@ static const struct io_op_def io_op_defs[] =3D { [IORING_OP_GETDENTS] =3D { .needs_file =3D 1, }, + [IORING_OP_FSETXATTR] =3D { + .needs_file =3D 1 + }, + [IORING_OP_SETXATTR] =3D {}, }; =20 /* requests with any of those set should undergo io_disarm_next() */ @@ -3887,6 +3899,139 @@ static int io_renameat(struct io_kiocb *req, unsi= gned int issue_flags) return 0; } =20 +static int __io_setxattr_prep(struct io_kiocb *req, + const struct io_uring_sqe *sqe) +{ + struct io_xattr *ix =3D &req->xattr; + const char __user *name; + int ret; + + if (unlikely(req->ctx->flags & IORING_SETUP_IOPOLL)) + return -EINVAL; + if (unlikely(sqe->ioprio)) + return -EINVAL; + if (unlikely(req->flags & REQ_F_FIXED_FILE)) + return -EBADF; + + ix->filename =3D NULL; + name =3D u64_to_user_ptr(READ_ONCE(sqe->addr)); + ix->ctx.value =3D u64_to_user_ptr(READ_ONCE(sqe->addr2)); + ix->ctx.kvalue =3D NULL; + ix->ctx.size =3D READ_ONCE(sqe->len); + ix->ctx.flags =3D READ_ONCE(sqe->xattr_flags); + + ix->ctx.kname =3D kmalloc(sizeof(*ix->ctx.kname), GFP_KERNEL); + if (!ix->ctx.kname) + return -ENOMEM; + + ret =3D setxattr_copy(name, &ix->ctx); + if (ret) { + kfree(ix->ctx.kname); + return ret; + } + + req->flags |=3D REQ_F_NEED_CLEANUP; + return 0; +} + +static int io_setxattr_prep(struct io_kiocb *req, + const struct io_uring_sqe *sqe) +{ + struct io_xattr *ix =3D &req->xattr; + const char __user *path; + int ret; + + ret =3D __io_setxattr_prep(req, sqe); + if (ret) + return ret; + + path =3D u64_to_user_ptr(READ_ONCE(sqe->addr3)); + + ix->filename =3D getname_flags(path, LOOKUP_FOLLOW, NULL); + if (IS_ERR(ix->filename)) { + ret =3D PTR_ERR(ix->filename); + ix->filename =3D NULL; + } + + return ret; +} + +static int io_fsetxattr_prep(struct io_kiocb *req, + const struct io_uring_sqe *sqe) +{ + return __io_setxattr_prep(req, sqe); +} + +static int __io_setxattr(struct io_kiocb *req, unsigned int issue_flags, + struct path *path) +{ + struct io_xattr *ix =3D &req->xattr; + int ret; + + ret =3D mnt_want_write(path->mnt); + if (!ret) { + ret =3D do_setxattr(mnt_user_ns(path->mnt), path->dentry, &ix->ctx); + mnt_drop_write(path->mnt); + } + + return ret; +} + +static void __io_setxattr_finish(struct io_kiocb *req, int ret) +{ + struct xattr_ctx *ctx =3D &req->xattr.ctx; + + req->flags &=3D ~REQ_F_NEED_CLEANUP; + + kfree(ctx->kname); + if (ctx->kvalue) + kvfree(ctx->kvalue); + + if (ret < 0) + req_set_fail(req); + + io_req_complete(req, ret); +} + +static int io_fsetxattr(struct io_kiocb *req, unsigned int issue_flags) +{ + int ret; + + if (issue_flags & IO_URING_F_NONBLOCK) + return -EAGAIN; + + ret =3D __io_setxattr(req, issue_flags, &req->file->f_path); + __io_setxattr_finish(req, ret); + + return 0; +} + +static int io_setxattr(struct io_kiocb *req, unsigned int issue_flags) +{ + struct io_xattr *ix =3D &req->xattr; + unsigned int lookup_flags =3D LOOKUP_FOLLOW; + struct path path; + int ret; + + if (issue_flags & IO_URING_F_NONBLOCK) + return -EAGAIN; + +retry: + ret =3D do_user_path_at_empty(AT_FDCWD, ix->filename, lookup_flags, &pa= th); + if (!ret) { + ret =3D __io_setxattr(req, issue_flags, &path); + path_put(&path); + if (retry_estale(ret, lookup_flags)) { + lookup_flags |=3D LOOKUP_REVAL; + goto retry; + } + } + putname(ix->filename); + + __io_setxattr_finish(req, ret); + return 0; +} + static int io_unlinkat_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) { @@ -6623,6 +6768,10 @@ static int io_req_prep(struct io_kiocb *req, const= struct io_uring_sqe *sqe) return io_linkat_prep(req, sqe); case IORING_OP_GETDENTS: return io_getdents_prep(req, sqe); + case IORING_OP_FSETXATTR: + return io_fsetxattr_prep(req, sqe); + case IORING_OP_SETXATTR: + return io_setxattr_prep(req, sqe); } =20 printk_once(KERN_WARNING "io_uring: unhandled opcode %d\n", @@ -6764,6 +6913,14 @@ static void io_clean_op(struct io_kiocb *req) putname(req->hardlink.oldpath); putname(req->hardlink.newpath); break; + case IORING_OP_SETXATTR: + if (req->xattr.filename) + putname(req->xattr.filename); + fallthrough; + case IORING_OP_FSETXATTR: + kfree(req->xattr.ctx.kname); + kvfree(req->xattr.ctx.kvalue); + break; } } if ((req->flags & REQ_F_POLLED) && req->apoll) { @@ -6909,6 +7066,12 @@ static int io_issue_sqe(struct io_kiocb *req, unsi= gned int issue_flags) case IORING_OP_GETDENTS: ret =3D io_getdents(req, issue_flags); break; + case IORING_OP_FSETXATTR: + ret =3D io_fsetxattr(req, issue_flags); + break; + case IORING_OP_SETXATTR: + ret =3D io_setxattr(req, issue_flags); + break; default: ret =3D -EINVAL; break; @@ -11277,6 +11440,7 @@ static int __init io_uring_init(void) BUILD_BUG_SQE_ELEM(42, __u16, personality); BUILD_BUG_SQE_ELEM(44, __s32, splice_fd_in); BUILD_BUG_SQE_ELEM(44, __u32, file_index); + BUILD_BUG_SQE_ELEM(48, __u64, addr3); =20 BUILD_BUG_ON(sizeof(struct io_uring_files_update) !=3D sizeof(struct io_uring_rsrc_update)); diff --git a/include/uapi/linux/io_uring.h b/include/uapi/linux/io_uring.= h index 57dc88db5793..c62a8bec8cd4 100644 --- a/include/uapi/linux/io_uring.h +++ b/include/uapi/linux/io_uring.h @@ -45,6 +45,7 @@ struct io_uring_sqe { __u32 rename_flags; __u32 unlink_flags; __u32 hardlink_flags; + __u32 xattr_flags; }; __u64 user_data; /* data to be passed back at completion time */ /* pack this to avoid bogus arm OABI complaints */ @@ -60,7 +61,8 @@ struct io_uring_sqe { __s32 splice_fd_in; __u32 file_index; }; - __u64 __pad2[2]; + __u64 addr3; + __u64 __pad2[1]; }; =20 enum { @@ -144,6 +146,8 @@ enum { IORING_OP_SYMLINKAT, IORING_OP_LINKAT, IORING_OP_GETDENTS, + IORING_OP_FSETXATTR, + IORING_OP_SETXATTR, =20 /* this goes last, obviously */ IORING_OP_LAST, --=20 2.30.2