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[23.128.96.35]) by mx.google.com with ESMTPS id a18-20020a63d212000000b005636ef310adsi2650240pgg.597.2023.09.14.23.17.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 14 Sep 2023 23:17:03 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.35 as permitted sender) client-ip=23.128.96.35; Authentication-Results: mx.google.com; dkim=pass header.i=@redhat.com header.s=mimecast20190719 header.b=BHKcJ6aH; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.35 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=redhat.com Received: from out1.vger.email (depot.vger.email [IPv6:2620:137:e000::3:0]) by groat.vger.email (Postfix) with ESMTP id 68D618373230; Thu, 14 Sep 2023 15:16:51 -0700 (PDT) X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.103.10 at groat.vger.email Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230100AbjINWQh (ORCPT + 33 others); Thu, 14 Sep 2023 18:16:37 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37842 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229908AbjINWQb (ORCPT ); Thu, 14 Sep 2023 18:16:31 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 9E4D62710 for ; Thu, 14 Sep 2023 15:15:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1694729738; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=4ut+h9nLVtpMfUa14begCRaPNr+Lp71R8/RKDVqE44g=; b=BHKcJ6aHPMsqw4PlENY2tMKZlJyk0kE+1XL9awiIPtgU9A5tQd4irYywtJWu/EzkfpOqtD TqvQJlL5Q1uWA4XPsqss1SKv3A4VIk5BENEAXnjDDJ/auboeCx4vo2NiIjT7NQEhszaMH2 6UZskyFtGDUmNssgGjEEU1zSJsrYgVg= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-615-Dibw7jBuPtiY53bSfV_A_Q-1; Thu, 14 Sep 2023 18:15:37 -0400 X-MC-Unique: Dibw7jBuPtiY53bSfV_A_Q-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.rdu2.redhat.com [10.11.54.3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 9C577101B456; Thu, 14 Sep 2023 22:15:36 +0000 (UTC) Received: from warthog.procyon.org.com (unknown [10.42.28.216]) by smtp.corp.redhat.com (Postfix) with ESMTP id 3D31410069B4; Thu, 14 Sep 2023 22:15:34 +0000 (UTC) From: David Howells To: Al Viro , Linus Torvalds Cc: David Howells , Jens Axboe , Christoph Hellwig , Christian Brauner , David Laight , Matthew Wilcox , Brendan Higgins , David Gow , linux-fsdevel@vger.kernel.org, linux-block@vger.kernel.org, linux-mm@kvack.org, netdev@vger.kernel.org, linux-kselftest@vger.kernel.org, kunit-dev@googlegroups.com, linux-kernel@vger.kernel.org, Christian Brauner , David Hildenbrand , John Hubbard Subject: [RFC PATCH 2/9] iov_iter: Consolidate some of the repeated code into helpers Date: Thu, 14 Sep 2023 23:15:19 +0100 Message-ID: <20230914221526.3153402-3-dhowells@redhat.com> In-Reply-To: <20230914221526.3153402-1-dhowells@redhat.com> References: <20230914221526.3153402-1-dhowells@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.3 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (groat.vger.email [0.0.0.0]); Thu, 14 Sep 2023 15:16:51 -0700 (PDT) X-Spam-Status: No, score=-0.9 required=5.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on groat.vger.email X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1777083218172484938 X-GMAIL-MSGID: 1777083218172484938 Consolidate some of the repeated code snippets into helper functions to reduce the line count. Signed-off-by: David Howells cc: Christoph Hellwig cc: Christian Brauner cc: Jens Axboe cc: Al Viro cc: David Hildenbrand cc: John Hubbard cc: Brendan Higgins cc: David Gow cc: linux-kselftest@vger.kernel.org cc: kunit-dev@googlegroups.com cc: linux-mm@kvack.org cc: linux-fsdevel@vger.kernel.org --- lib/kunit_iov_iter.c | 189 +++++++++++++++++++------------------------ 1 file changed, 84 insertions(+), 105 deletions(-) diff --git a/lib/kunit_iov_iter.c b/lib/kunit_iov_iter.c index 4a6c0efd33f5..ee586eb652b4 100644 --- a/lib/kunit_iov_iter.c +++ b/lib/kunit_iov_iter.c @@ -19,18 +19,18 @@ MODULE_AUTHOR("David Howells "); MODULE_LICENSE("GPL"); struct kvec_test_range { - int from, to; + int page, from, to; }; static const struct kvec_test_range kvec_test_ranges[] = { - { 0x00002, 0x00002 }, - { 0x00027, 0x03000 }, - { 0x05193, 0x18794 }, - { 0x20000, 0x20000 }, - { 0x20000, 0x24000 }, - { 0x24000, 0x27001 }, - { 0x29000, 0xffffb }, - { 0xffffd, 0xffffe }, + { 0, 0x00002, 0x00002 }, + { 0, 0x00027, 0x03000 }, + { 0, 0x05193, 0x18794 }, + { 0, 0x20000, 0x20000 }, + { 0, 0x20000, 0x24000 }, + { 0, 0x24000, 0x27001 }, + { 0, 0x29000, 0xffffb }, + { 0, 0xffffd, 0xffffe }, { -1 } }; @@ -69,6 +69,57 @@ static void *__init iov_kunit_create_buffer(struct kunit *test, return buffer; } +/* + * Build the reference pattern in the scratch buffer that we expect to see in + * the iterator buffer (ie. the result of copy *to*). + */ +static void iov_kunit_build_to_reference_pattern(struct kunit *test, u8 *scratch, + size_t bufsize, + const struct kvec_test_range *pr) +{ + int i, patt = 0; + + memset(scratch, 0, bufsize); + for (; pr->page >= 0; pr++) + for (i = pr->from; i < pr->to; i++) + scratch[i] = pattern(patt++); +} + +/* + * Build the reference pattern in the iterator buffer that we expect to see in + * the scratch buffer (ie. the result of copy *from*). + */ +static void iov_kunit_build_from_reference_pattern(struct kunit *test, u8 *buffer, + size_t bufsize, + const struct kvec_test_range *pr) +{ + size_t i = 0, j; + + memset(buffer, 0, bufsize); + for (; pr->page >= 0; pr++) { + for (j = pr->from; j < pr->to; j++) { + buffer[i++] = pattern(j); + if (i >= bufsize) + return; + } + } +} + +/* + * Compare two kernel buffers to see that they're the same. + */ +static void iov_kunit_check_pattern(struct kunit *test, const u8 *buffer, + const u8 *scratch, size_t bufsize) +{ + size_t i; + + for (i = 0; i < bufsize; i++) { + KUNIT_EXPECT_EQ_MSG(test, buffer[i], scratch[i], "at i=%x", i); + if (buffer[i] != scratch[i]) + return; + } +} + static void __init iov_kunit_load_kvec(struct kunit *test, struct iov_iter *iter, int dir, struct kvec *kvec, unsigned int kvmax, @@ -79,7 +130,7 @@ static void __init iov_kunit_load_kvec(struct kunit *test, int i; for (i = 0; i < kvmax; i++, pr++) { - if (pr->from < 0) + if (pr->page < 0) break; KUNIT_ASSERT_GE(test, pr->to, pr->from); KUNIT_ASSERT_LE(test, pr->to, bufsize); @@ -97,13 +148,12 @@ static void __init iov_kunit_load_kvec(struct kunit *test, */ static void __init iov_kunit_copy_to_kvec(struct kunit *test) { - const struct kvec_test_range *pr; struct iov_iter iter; struct page **spages, **bpages; struct kvec kvec[8]; u8 *scratch, *buffer; size_t bufsize, npages, size, copied; - int i, patt; + int i; bufsize = 0x100000; npages = bufsize / PAGE_SIZE; @@ -125,20 +175,8 @@ static void __init iov_kunit_copy_to_kvec(struct kunit *test) KUNIT_EXPECT_EQ(test, iter.count, 0); KUNIT_EXPECT_EQ(test, iter.nr_segs, 0); - /* Build the expected image in the scratch buffer. */ - patt = 0; - memset(scratch, 0, bufsize); - for (pr = kvec_test_ranges; pr->from >= 0; pr++) - for (i = pr->from; i < pr->to; i++) - scratch[i] = pattern(patt++); - - /* Compare the images */ - for (i = 0; i < bufsize; i++) { - KUNIT_EXPECT_EQ_MSG(test, buffer[i], scratch[i], "at i=%x", i); - if (buffer[i] != scratch[i]) - return; - } - + iov_kunit_build_to_reference_pattern(test, scratch, bufsize, kvec_test_ranges); + iov_kunit_check_pattern(test, buffer, scratch, bufsize); KUNIT_SUCCEED(); } @@ -147,13 +185,12 @@ static void __init iov_kunit_copy_to_kvec(struct kunit *test) */ static void __init iov_kunit_copy_from_kvec(struct kunit *test) { - const struct kvec_test_range *pr; struct iov_iter iter; struct page **spages, **bpages; struct kvec kvec[8]; u8 *scratch, *buffer; size_t bufsize, npages, size, copied; - int i, j; + int i; bufsize = 0x100000; npages = bufsize / PAGE_SIZE; @@ -175,25 +212,8 @@ static void __init iov_kunit_copy_from_kvec(struct kunit *test) KUNIT_EXPECT_EQ(test, iter.count, 0); KUNIT_EXPECT_EQ(test, iter.nr_segs, 0); - /* Build the expected image in the main buffer. */ - i = 0; - memset(buffer, 0, bufsize); - for (pr = kvec_test_ranges; pr->from >= 0; pr++) { - for (j = pr->from; j < pr->to; j++) { - buffer[i++] = pattern(j); - if (i >= bufsize) - goto stop; - } - } -stop: - - /* Compare the images */ - for (i = 0; i < bufsize; i++) { - KUNIT_EXPECT_EQ_MSG(test, scratch[i], buffer[i], "at i=%x", i); - if (scratch[i] != buffer[i]) - return; - } - + iov_kunit_build_from_reference_pattern(test, buffer, bufsize, kvec_test_ranges); + iov_kunit_check_pattern(test, buffer, scratch, bufsize); KUNIT_SUCCEED(); } @@ -210,7 +230,7 @@ static const struct bvec_test_range bvec_test_ranges[] = { { 5, 0x0000, 0x1000 }, { 6, 0x0000, 0x0ffb }, { 6, 0x0ffd, 0x0ffe }, - { -1, -1, -1 } + { -1 } }; static void __init iov_kunit_load_bvec(struct kunit *test, @@ -225,7 +245,7 @@ static void __init iov_kunit_load_bvec(struct kunit *test, int i; for (i = 0; i < bvmax; i++, pr++) { - if (pr->from < 0) + if (pr->page < 0) break; KUNIT_ASSERT_LT(test, pr->page, npages); KUNIT_ASSERT_LT(test, pr->page * PAGE_SIZE, bufsize); @@ -288,20 +308,14 @@ static void __init iov_kunit_copy_to_bvec(struct kunit *test) b = 0; patt = 0; memset(scratch, 0, bufsize); - for (pr = bvec_test_ranges; pr->from >= 0; pr++, b++) { + for (pr = bvec_test_ranges; pr->page >= 0; pr++, b++) { u8 *p = scratch + pr->page * PAGE_SIZE; for (i = pr->from; i < pr->to; i++) p[i] = pattern(patt++); } - /* Compare the images */ - for (i = 0; i < bufsize; i++) { - KUNIT_EXPECT_EQ_MSG(test, buffer[i], scratch[i], "at i=%x", i); - if (buffer[i] != scratch[i]) - return; - } - + iov_kunit_check_pattern(test, buffer, scratch, bufsize); KUNIT_SUCCEED(); } @@ -341,7 +355,7 @@ static void __init iov_kunit_copy_from_bvec(struct kunit *test) /* Build the expected image in the main buffer. */ i = 0; memset(buffer, 0, bufsize); - for (pr = bvec_test_ranges; pr->from >= 0; pr++) { + for (pr = bvec_test_ranges; pr->page >= 0; pr++) { size_t patt = pr->page * PAGE_SIZE; for (j = pr->from; j < pr->to; j++) { @@ -352,13 +366,7 @@ static void __init iov_kunit_copy_from_bvec(struct kunit *test) } stop: - /* Compare the images */ - for (i = 0; i < bufsize; i++) { - KUNIT_EXPECT_EQ_MSG(test, scratch[i], buffer[i], "at i=%x", i); - if (scratch[i] != buffer[i]) - return; - } - + iov_kunit_check_pattern(test, buffer, scratch, bufsize); KUNIT_SUCCEED(); } @@ -409,7 +417,7 @@ static void __init iov_kunit_copy_to_xarray(struct kunit *test) struct page **spages, **bpages; u8 *scratch, *buffer; size_t bufsize, npages, size, copied; - int i, patt; + int i; bufsize = 0x100000; npages = bufsize / PAGE_SIZE; @@ -426,7 +434,7 @@ static void __init iov_kunit_copy_to_xarray(struct kunit *test) iov_kunit_load_xarray(test, &iter, READ, xarray, bpages, npages); i = 0; - for (pr = kvec_test_ranges; pr->from >= 0; pr++) { + for (pr = kvec_test_ranges; pr->page >= 0; pr++) { size = pr->to - pr->from; KUNIT_ASSERT_LE(test, pr->to, bufsize); @@ -439,20 +447,8 @@ static void __init iov_kunit_copy_to_xarray(struct kunit *test) i += size; } - /* Build the expected image in the scratch buffer. */ - patt = 0; - memset(scratch, 0, bufsize); - for (pr = kvec_test_ranges; pr->from >= 0; pr++) - for (i = pr->from; i < pr->to; i++) - scratch[i] = pattern(patt++); - - /* Compare the images */ - for (i = 0; i < bufsize; i++) { - KUNIT_EXPECT_EQ_MSG(test, buffer[i], scratch[i], "at i=%x", i); - if (buffer[i] != scratch[i]) - return; - } - + iov_kunit_build_to_reference_pattern(test, scratch, bufsize, kvec_test_ranges); + iov_kunit_check_pattern(test, buffer, scratch, bufsize); KUNIT_SUCCEED(); } @@ -467,7 +463,7 @@ static void __init iov_kunit_copy_from_xarray(struct kunit *test) struct page **spages, **bpages; u8 *scratch, *buffer; size_t bufsize, npages, size, copied; - int i, j; + int i; bufsize = 0x100000; npages = bufsize / PAGE_SIZE; @@ -484,7 +480,7 @@ static void __init iov_kunit_copy_from_xarray(struct kunit *test) iov_kunit_load_xarray(test, &iter, READ, xarray, bpages, npages); i = 0; - for (pr = kvec_test_ranges; pr->from >= 0; pr++) { + for (pr = kvec_test_ranges; pr->page >= 0; pr++) { size = pr->to - pr->from; KUNIT_ASSERT_LE(test, pr->to, bufsize); @@ -497,25 +493,8 @@ static void __init iov_kunit_copy_from_xarray(struct kunit *test) i += size; } - /* Build the expected image in the main buffer. */ - i = 0; - memset(buffer, 0, bufsize); - for (pr = kvec_test_ranges; pr->from >= 0; pr++) { - for (j = pr->from; j < pr->to; j++) { - buffer[i++] = pattern(j); - if (i >= bufsize) - goto stop; - } - } -stop: - - /* Compare the images */ - for (i = 0; i < bufsize; i++) { - KUNIT_EXPECT_EQ_MSG(test, scratch[i], buffer[i], "at i=%x", i); - if (scratch[i] != buffer[i]) - return; - } - + iov_kunit_build_from_reference_pattern(test, buffer, bufsize, kvec_test_ranges); + iov_kunit_check_pattern(test, buffer, scratch, bufsize); KUNIT_SUCCEED(); } @@ -573,7 +552,7 @@ static void __init iov_kunit_extract_pages_kvec(struct kunit *test) while (from == pr->to) { pr++; from = pr->from; - if (from < 0) + if (pr->page < 0) goto stop; } ix = from / PAGE_SIZE; @@ -651,7 +630,7 @@ static void __init iov_kunit_extract_pages_bvec(struct kunit *test) while (from == pr->to) { pr++; from = pr->from; - if (from < 0) + if (pr->page < 0) goto stop; } ix = pr->page + from / PAGE_SIZE; @@ -698,7 +677,7 @@ static void __init iov_kunit_extract_pages_xarray(struct kunit *test) iov_kunit_create_buffer(test, &bpages, npages); iov_kunit_load_xarray(test, &iter, READ, xarray, bpages, npages); - for (pr = kvec_test_ranges; pr->from >= 0; pr++) { + for (pr = kvec_test_ranges; pr->page >= 0; pr++) { from = pr->from; size = pr->to - from; KUNIT_ASSERT_LE(test, pr->to, bufsize);