From patchwork Fri Aug 21 15:01:32 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Roman Gushchin X-Patchwork-Id: 262113 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=-12.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=unavailable 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 D1E78C433DF for ; Fri, 21 Aug 2020 15:07:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A77AF20656 for ; Fri, 21 Aug 2020 15:07:11 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=fb.com header.i=@fb.com header.b="cLxEmRzX" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728063AbgHUPHF (ORCPT ); Fri, 21 Aug 2020 11:07:05 -0400 Received: from mx0b-00082601.pphosted.com ([67.231.153.30]:32116 "EHLO mx0b-00082601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727945AbgHUPGu (ORCPT ); Fri, 21 Aug 2020 11:06:50 -0400 Received: from pps.filterd (m0109331.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 07LF3sMQ019136 for ; Fri, 21 Aug 2020 08:06:48 -0700 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=RZYe74Umrx4SuZo82U3dVJ635qqku6CpK0PXhAa9zAQ=; b=cLxEmRzXscG58p7pjoeY9Bt63iqgWSCYGe1GZCekwZ1Ev7ZpZj5KPKSpB/GKYZd/pUoY Z6BAkQ3h3PAJYxwECwvIBAnhIxth0SR5eLPB3SukbHSONbQ+cdN3W85yNc8qMrbBLrWg ESiA9z61XbruDivix7d35oaLa6qMwejvnSs= Received: from mail.thefacebook.com ([163.114.132.120]) by mx0a-00082601.pphosted.com with ESMTP id 3304kq50s2-7 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Fri, 21 Aug 2020 08:06:48 -0700 Received: from intmgw004.06.prn3.facebook.com (2620:10d:c085:208::f) by mail.thefacebook.com (2620:10d:c085:21d::5) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1979.3; Fri, 21 Aug 2020 08:06:43 -0700 Received: by devvm1096.prn0.facebook.com (Postfix, from userid 111017) id B4D80344107F; Fri, 21 Aug 2020 08:01:35 -0700 (PDT) Smtp-Origin-Hostprefix: devvm From: Roman Gushchin Smtp-Origin-Hostname: devvm1096.prn0.facebook.com To: CC: , Alexei Starovoitov , Daniel Borkmann , , , Johannes Weiner , Shakeel Butt , , Roman Gushchin Smtp-Origin-Cluster: prn0c01 Subject: [PATCH bpf-next v4 28/30] bpf: eliminate rlimit-based memory accounting infra for bpf maps Date: Fri, 21 Aug 2020 08:01:32 -0700 Message-ID: <20200821150134.2581465-29-guro@fb.com> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200821150134.2581465-1-guro@fb.com> References: <20200821150134.2581465-1-guro@fb.com> MIME-Version: 1.0 X-FB-Internal: Safe X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.235, 18.0.687 definitions=2020-08-21_08:2020-08-21,2020-08-21 signatures=0 X-Proofpoint-Spam-Details: rule=fb_default_notspam policy=fb_default score=0 clxscore=1015 spamscore=0 impostorscore=0 mlxscore=0 adultscore=0 malwarescore=0 mlxlogscore=999 lowpriorityscore=0 suspectscore=38 phishscore=0 bulkscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2008210142 X-FB-Internal: deliver Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Remove rlimit-based accounting infrastructure code, which is not used anymore. Signed-off-by: Roman Gushchin --- include/linux/bpf.h | 12 ---- kernel/bpf/syscall.c | 64 +------------------ .../selftests/bpf/progs/map_ptr_kern.c | 5 -- 3 files changed, 2 insertions(+), 79 deletions(-) diff --git a/include/linux/bpf.h b/include/linux/bpf.h index b5f178afde94..7f81cbb981a6 100644 --- a/include/linux/bpf.h +++ b/include/linux/bpf.h @@ -113,11 +113,6 @@ struct bpf_map_ops { const struct bpf_iter_seq_info *iter_seq_info; }; -struct bpf_map_memory { - u32 pages; - struct user_struct *user; -}; - struct bpf_map { /* The first two cachelines with read-mostly members of which some * are also accessed in fast-path (e.g. ops, max_entries). @@ -138,7 +133,6 @@ struct bpf_map { u32 btf_key_type_id; u32 btf_value_type_id; struct btf *btf; - struct bpf_map_memory memory; #ifdef CONFIG_MEMCG_KMEM struct mem_cgroup *memcg; #endif @@ -1148,12 +1142,6 @@ void bpf_map_inc_with_uref(struct bpf_map *map); struct bpf_map * __must_check bpf_map_inc_not_zero(struct bpf_map *map); void bpf_map_put_with_uref(struct bpf_map *map); void bpf_map_put(struct bpf_map *map); -int bpf_map_charge_memlock(struct bpf_map *map, u32 pages); -void bpf_map_uncharge_memlock(struct bpf_map *map, u32 pages); -int bpf_map_charge_init(struct bpf_map_memory *mem, u64 size); -void bpf_map_charge_finish(struct bpf_map_memory *mem); -void bpf_map_charge_move(struct bpf_map_memory *dst, - struct bpf_map_memory *src); void *bpf_map_area_alloc(u64 size, int numa_node); void *bpf_map_area_mmapable_alloc(u64 size, int numa_node); void bpf_map_area_free(void *base); diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c index 683614c17a95..392e3b2f58e4 100644 --- a/kernel/bpf/syscall.c +++ b/kernel/bpf/syscall.c @@ -355,60 +355,6 @@ static void bpf_uncharge_memlock(struct user_struct *user, u32 pages) atomic_long_sub(pages, &user->locked_vm); } -int bpf_map_charge_init(struct bpf_map_memory *mem, u64 size) -{ - u32 pages = round_up(size, PAGE_SIZE) >> PAGE_SHIFT; - struct user_struct *user; - int ret; - - if (size >= U32_MAX - PAGE_SIZE) - return -E2BIG; - - user = get_current_user(); - ret = bpf_charge_memlock(user, pages); - if (ret) { - free_uid(user); - return ret; - } - - mem->pages = pages; - mem->user = user; - - return 0; -} - -void bpf_map_charge_finish(struct bpf_map_memory *mem) -{ - bpf_uncharge_memlock(mem->user, mem->pages); - free_uid(mem->user); -} - -void bpf_map_charge_move(struct bpf_map_memory *dst, - struct bpf_map_memory *src) -{ - *dst = *src; - - /* Make sure src will not be used for the redundant uncharging. */ - memset(src, 0, sizeof(struct bpf_map_memory)); -} - -int bpf_map_charge_memlock(struct bpf_map *map, u32 pages) -{ - int ret; - - ret = bpf_charge_memlock(map->memory.user, pages); - if (ret) - return ret; - map->memory.pages += pages; - return ret; -} - -void bpf_map_uncharge_memlock(struct bpf_map *map, u32 pages) -{ - bpf_uncharge_memlock(map->memory.user, pages); - map->memory.pages -= pages; -} - static int bpf_map_alloc_id(struct bpf_map *map) { int id; @@ -478,13 +424,10 @@ static void bpf_map_release_memcg(struct bpf_map *map) static void bpf_map_free_deferred(struct work_struct *work) { struct bpf_map *map = container_of(work, struct bpf_map, work); - struct bpf_map_memory mem; - bpf_map_charge_move(&mem, &map->memory); security_bpf_map_free(map); /* implementation dependent freeing */ map->ops->map_free(map); - bpf_map_charge_finish(&mem); bpf_map_release_memcg(map); } @@ -564,7 +507,7 @@ static void bpf_map_show_fdinfo(struct seq_file *m, struct file *filp) "value_size:\t%u\n" "max_entries:\t%u\n" "map_flags:\t%#x\n" - "memlock:\t%llu\n" + "memlock:\t%llu\n" /* deprecated */ "map_id:\t%u\n" "frozen:\t%u\n", map->map_type, @@ -572,7 +515,7 @@ static void bpf_map_show_fdinfo(struct seq_file *m, struct file *filp) map->value_size, map->max_entries, map->map_flags, - map->memory.pages * 1ULL << PAGE_SHIFT, + 0LLU, map->id, READ_ONCE(map->frozen)); if (type) { @@ -813,7 +756,6 @@ static int map_check_btf(struct bpf_map *map, const struct btf *btf, static int map_create(union bpf_attr *attr) { int numa_node = bpf_map_attr_numa_node(attr); - struct bpf_map_memory mem; struct bpf_map *map; int f_flags; int err; @@ -912,9 +854,7 @@ static int map_create(union bpf_attr *attr) security_bpf_map_free(map); free_map: btf_put(map->btf); - bpf_map_charge_move(&mem, &map->memory); map->ops->map_free(map); - bpf_map_charge_finish(&mem); return err; } diff --git a/tools/testing/selftests/bpf/progs/map_ptr_kern.c b/tools/testing/selftests/bpf/progs/map_ptr_kern.c index 473665cac67e..49d1dcaf7999 100644 --- a/tools/testing/selftests/bpf/progs/map_ptr_kern.c +++ b/tools/testing/selftests/bpf/progs/map_ptr_kern.c @@ -26,17 +26,12 @@ __u32 g_line = 0; return 0; \ }) -struct bpf_map_memory { - __u32 pages; -} __attribute__((preserve_access_index)); - struct bpf_map { enum bpf_map_type map_type; __u32 key_size; __u32 value_size; __u32 max_entries; __u32 id; - struct bpf_map_memory memory; } __attribute__((preserve_access_index)); static inline int check_bpf_map_fields(struct bpf_map *map, __u32 key_size,