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 X-Spam-Level: X-Spam-Status: No, score=-9.5 required=3.0 tests=DKIM_ADSP_CUSTOM_MED, DKIM_INVALID,DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, 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 133DEC3A5A2 for ; Fri, 20 Sep 2019 23:48:40 +0000 (UTC) Received: from ml01.01.org (ml01.01.org [198.145.21.10]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id D554E2073F for ; Fri, 20 Sep 2019 23:48:39 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=google.com header.i=@google.com header.b="GsWGBhOH" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D554E2073F Authentication-Results: mail.kernel.org; dmarc=fail (p=reject dis=none) header.from=google.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-nvdimm-bounces@lists.01.org Received: from [127.0.0.1] (localhost [IPv6:::1]) by ml01.01.org (Postfix) with ESMTP id 9F948202ECFC0; Fri, 20 Sep 2019 16:47:34 -0700 (PDT) Received-SPF: Pass (sender SPF authorized) identity=mailfrom; client-ip=2607:f8b0:4864:20::d49; helo=mail-io1-xd49.google.com; envelope-from=3k16fxq4kdfg1h4d30d78668di6ee6b4.2ecb8dkn-dl38ccb8iji.qr.eh6@flex--brendanhiggins.bounces.google.com; receiver=linux-nvdimm@lists.01.org Received: from mail-io1-xd49.google.com (mail-io1-xd49.google.com [IPv6:2607:f8b0:4864:20::d49]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id 70700202ECFBC for ; Fri, 20 Sep 2019 16:47:33 -0700 (PDT) Received: by mail-io1-xd49.google.com with SMTP id g8so13026745iop.19 for ; Fri, 20 Sep 2019 16:48:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=ElRDx1qJcaCd9VphSUpnYDbASsESTUgM/w0RFDoqEmU=; b=GsWGBhOHFwqzmYbnIwAYtO57z8py3WOmCJPdLFYuw6RFrKLNNB9f+XUdSZKJPEfvfD +NPUejzdLRFYtwKn24zsQIDdlhUH4qeWO7CUg3F5Oh6T8iCFpluNFZJfsTVxA48xUjI7 0cRQMZT+GVzHvmIQHfg0vMnqkRF6nw3Z+dYyNWlIrFCThTwglM+W0GIoNNAeRxE1KVXg bJYFBMD1KgiimcmXehIcJauhLSg0Qaa7OBoFzVXFWXGm2ACk92z4rmMdBpmyo2tkZso4 vGNbfyLO6jfHLBPB64QxZYZEhxxuOi2rvoSWYu2nV1Krj/0uC0+xeyeUj9svgmSWetAY DrPQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=ElRDx1qJcaCd9VphSUpnYDbASsESTUgM/w0RFDoqEmU=; b=V9W6jbz4t5GVwn/d09QQryJzYXVHLt233Lu8Nge9aP6ousZ96AnaGltvMSWuzdXg1c D+FYgus61DAtUVM2eV4z+9raEQrD9rx7X/RiRl1dA/WJ+Yvn4cqPLEzWChriTgSpzgWZ /3OQCvBkLdC0Kcfkz5G9wIUhm1+krW8xf6f5h4x+5cqkjkqqTCIRR8wj3eajV8+oTOBG ZNSRjORBIzzKrh1bVGIC1PS83WYS6buhKvQvLTRH7VksNJZWU35wEP756SOYKUxvMUwV bfeNUuJY/baHPRDoQOWclOAAPUN8tHlAuRBD1o05RIde+bk9puwB5uV01CVoDqlYxtOD fXgA== X-Gm-Message-State: APjAAAXLO4j1URNOcwomONDr4ClvkDuj2ATDjnE2ysEtK5cfsJ/HOAef flZlMi4+air+cK3H7cuyodFEWGnQt4wyJOrLEAnHmg== X-Google-Smtp-Source: APXvYqwzprpUv3Sy57r3sQtteXWHKXfGpdgcIHLQjNVIB2eFN+Njs56UhVpiXHuIqV01MQkxK/5GcVapBZZ9KRKCqd8mXw== X-Received: by 2002:a63:5807:: with SMTP id m7mr17564787pgb.371.1569021587112; Fri, 20 Sep 2019 16:19:47 -0700 (PDT) Date: Fri, 20 Sep 2019 16:19:07 -0700 In-Reply-To: <20190920231923.141900-1-brendanhiggins@google.com> Message-Id: <20190920231923.141900-4-brendanhiggins@google.com> Mime-Version: 1.0 References: <20190920231923.141900-1-brendanhiggins@google.com> X-Mailer: git-send-email 2.23.0.351.gc4317032e6-goog Subject: [PATCH v16 03/19] kunit: test: add string_stream a std::stream like string builder From: Brendan Higgins To: frowand.list@gmail.com, gregkh@linuxfoundation.org, jpoimboe@redhat.com, keescook@google.com, kieran.bingham@ideasonboard.com, mcgrof@kernel.org, peterz@infradead.org, robh@kernel.org, sboyd@kernel.org, shuah@kernel.org, tytso@mit.edu, yamada.masahiro@socionext.com X-BeenThere: linux-nvdimm@lists.01.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Linux-nvdimm developer list." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: pmladek@suse.com, linux-doc@vger.kernel.org, amir73il@gmail.com, Brendan Higgins , dri-devel@lists.freedesktop.org, Alexander.Levin@microsoft.com, linux-kselftest@vger.kernel.org, linux-nvdimm@lists.01.org, khilman@baylibre.com, knut.omang@oracle.com, wfg@linux.intel.com, joel@jms.id.au, rientjes@google.com, jdike@addtoit.com, dan.carpenter@oracle.com, devicetree@vger.kernel.org, linux-kbuild@vger.kernel.org, Tim.Bird@sony.com, linux-um@lists.infradead.org, rostedt@goodmis.org, Stephen Boyd , julia.lawall@lip6.fr, kunit-dev@googlegroups.com, richard@nod.at, torvalds@linux-foundation.org, rdunlap@infradead.org, linux-kernel@vger.kernel.org, daniel@ffwll.ch, mpe@ellerman.id.au, linux-fsdevel@vger.kernel.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: linux-nvdimm-bounces@lists.01.org Sender: "Linux-nvdimm" A number of test features need to do pretty complicated string printing where it may not be possible to rely on a single preallocated string with parameters. So provide a library for constructing the string as you go similar to C++'s std::string. string_stream is really just a string builder, nothing more. Signed-off-by: Brendan Higgins Reviewed-by: Greg Kroah-Hartman Reviewed-by: Logan Gunthorpe Reviewed-by: Stephen Boyd --- include/kunit/string-stream.h | 51 ++++++++ lib/kunit/Makefile | 3 +- lib/kunit/string-stream.c | 217 ++++++++++++++++++++++++++++++++++ 3 files changed, 270 insertions(+), 1 deletion(-) create mode 100644 include/kunit/string-stream.h create mode 100644 lib/kunit/string-stream.c diff --git a/include/kunit/string-stream.h b/include/kunit/string-stream.h new file mode 100644 index 000000000000..fe98a00b75a9 --- /dev/null +++ b/include/kunit/string-stream.h @@ -0,0 +1,51 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * C++ stream style string builder used in KUnit for building messages. + * + * Copyright (C) 2019, Google LLC. + * Author: Brendan Higgins + */ + +#ifndef _KUNIT_STRING_STREAM_H +#define _KUNIT_STRING_STREAM_H + +#include +#include +#include + +struct string_stream_fragment { + struct kunit *test; + struct list_head node; + char *fragment; +}; + +struct string_stream { + size_t length; + struct list_head fragments; + /* length and fragments are protected by this lock */ + spinlock_t lock; + struct kunit *test; + gfp_t gfp; +}; + +struct kunit; + +struct string_stream *alloc_string_stream(struct kunit *test, gfp_t gfp); + +int __printf(2, 3) string_stream_add(struct string_stream *stream, + const char *fmt, ...); + +int string_stream_vadd(struct string_stream *stream, + const char *fmt, + va_list args); + +char *string_stream_get_string(struct string_stream *stream); + +int string_stream_append(struct string_stream *stream, + struct string_stream *other); + +bool string_stream_is_empty(struct string_stream *stream); + +int string_stream_destroy(struct string_stream *stream); + +#endif /* _KUNIT_STRING_STREAM_H */ diff --git a/lib/kunit/Makefile b/lib/kunit/Makefile index 5efdc4dea2c0..275b565a0e81 100644 --- a/lib/kunit/Makefile +++ b/lib/kunit/Makefile @@ -1 +1,2 @@ -obj-$(CONFIG_KUNIT) += test.o +obj-$(CONFIG_KUNIT) += test.o \ + string-stream.o diff --git a/lib/kunit/string-stream.c b/lib/kunit/string-stream.c new file mode 100644 index 000000000000..e6d17aacca30 --- /dev/null +++ b/lib/kunit/string-stream.c @@ -0,0 +1,217 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * C++ stream style string builder used in KUnit for building messages. + * + * Copyright (C) 2019, Google LLC. + * Author: Brendan Higgins + */ + +#include +#include +#include +#include + +struct string_stream_fragment_alloc_context { + struct kunit *test; + int len; + gfp_t gfp; +}; + +static int string_stream_fragment_init(struct kunit_resource *res, + void *context) +{ + struct string_stream_fragment_alloc_context *ctx = context; + struct string_stream_fragment *frag; + + frag = kunit_kzalloc(ctx->test, sizeof(*frag), ctx->gfp); + if (!frag) + return -ENOMEM; + + frag->test = ctx->test; + frag->fragment = kunit_kmalloc(ctx->test, ctx->len, ctx->gfp); + if (!frag->fragment) + return -ENOMEM; + + res->allocation = frag; + + return 0; +} + +static void string_stream_fragment_free(struct kunit_resource *res) +{ + struct string_stream_fragment *frag = res->allocation; + + list_del(&frag->node); + kunit_kfree(frag->test, frag->fragment); + kunit_kfree(frag->test, frag); +} + +static struct string_stream_fragment *alloc_string_stream_fragment( + struct kunit *test, int len, gfp_t gfp) +{ + struct string_stream_fragment_alloc_context context = { + .test = test, + .len = len, + .gfp = gfp + }; + + return kunit_alloc_resource(test, + string_stream_fragment_init, + string_stream_fragment_free, + gfp, + &context); +} + +static int string_stream_fragment_destroy(struct string_stream_fragment *frag) +{ + return kunit_resource_destroy(frag->test, + kunit_resource_instance_match, + string_stream_fragment_free, + frag); +} + +int string_stream_vadd(struct string_stream *stream, + const char *fmt, + va_list args) +{ + struct string_stream_fragment *frag_container; + int len; + va_list args_for_counting; + + /* Make a copy because `vsnprintf` could change it */ + va_copy(args_for_counting, args); + + /* Need space for null byte. */ + len = vsnprintf(NULL, 0, fmt, args_for_counting) + 1; + + va_end(args_for_counting); + + frag_container = alloc_string_stream_fragment(stream->test, + len, + stream->gfp); + if (!frag_container) + return -ENOMEM; + + len = vsnprintf(frag_container->fragment, len, fmt, args); + spin_lock(&stream->lock); + stream->length += len; + list_add_tail(&frag_container->node, &stream->fragments); + spin_unlock(&stream->lock); + + return 0; +} + +int string_stream_add(struct string_stream *stream, const char *fmt, ...) +{ + va_list args; + int result; + + va_start(args, fmt); + result = string_stream_vadd(stream, fmt, args); + va_end(args); + + return result; +} + +static void string_stream_clear(struct string_stream *stream) +{ + struct string_stream_fragment *frag_container, *frag_container_safe; + + spin_lock(&stream->lock); + list_for_each_entry_safe(frag_container, + frag_container_safe, + &stream->fragments, + node) { + string_stream_fragment_destroy(frag_container); + } + stream->length = 0; + spin_unlock(&stream->lock); +} + +char *string_stream_get_string(struct string_stream *stream) +{ + struct string_stream_fragment *frag_container; + size_t buf_len = stream->length + 1; /* +1 for null byte. */ + char *buf; + + buf = kunit_kzalloc(stream->test, buf_len, stream->gfp); + if (!buf) + return NULL; + + spin_lock(&stream->lock); + list_for_each_entry(frag_container, &stream->fragments, node) + strlcat(buf, frag_container->fragment, buf_len); + spin_unlock(&stream->lock); + + return buf; +} + +int string_stream_append(struct string_stream *stream, + struct string_stream *other) +{ + const char *other_content; + + other_content = string_stream_get_string(other); + + if (!other_content) + return -ENOMEM; + + return string_stream_add(stream, other_content); +} + +bool string_stream_is_empty(struct string_stream *stream) +{ + return list_empty(&stream->fragments); +} + +struct string_stream_alloc_context { + struct kunit *test; + gfp_t gfp; +}; + +static int string_stream_init(struct kunit_resource *res, void *context) +{ + struct string_stream *stream; + struct string_stream_alloc_context *ctx = context; + + stream = kunit_kzalloc(ctx->test, sizeof(*stream), ctx->gfp); + if (!stream) + return -ENOMEM; + + res->allocation = stream; + stream->gfp = ctx->gfp; + stream->test = ctx->test; + INIT_LIST_HEAD(&stream->fragments); + spin_lock_init(&stream->lock); + + return 0; +} + +static void string_stream_free(struct kunit_resource *res) +{ + struct string_stream *stream = res->allocation; + + string_stream_clear(stream); +} + +struct string_stream *alloc_string_stream(struct kunit *test, gfp_t gfp) +{ + struct string_stream_alloc_context context = { + .test = test, + .gfp = gfp + }; + + return kunit_alloc_resource(test, + string_stream_init, + string_stream_free, + gfp, + &context); +} + +int string_stream_destroy(struct string_stream *stream) +{ + return kunit_resource_destroy(stream->test, + kunit_resource_instance_match, + string_stream_free, + stream); +} -- 2.23.0.351.gc4317032e6-goog _______________________________________________ Linux-nvdimm mailing list Linux-nvdimm@lists.01.org https://lists.01.org/mailman/listinfo/linux-nvdimm 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 X-Spam-Level: X-Spam-Status: No, score=-17.4 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT,USER_IN_DEF_DKIM_WL autolearn=ham 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 3177EC3A5A2 for ; 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a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=ElRDx1qJcaCd9VphSUpnYDbASsESTUgM/w0RFDoqEmU=; b=TDsBhkO2O+WnIOg4eCXKMLTTWr94JGGjKQUMfPpuXREU4UyXWGLyy8C5TX2nNsuMBr ZxWjrrYWPdyFpXun3TWrpEMV8G0hsqUNpvhTDN8OaToN7C5eQ9sYKL1zSIbMNl4vuHsK 1A0WobOabj/LO3PBJt/C8e6yecYJ+HQkcOZUNcU77alJR1SB/zrZBZTvI96sSo5sQNcz kSdEJ9sIkdc+O4/f1TSFy3nYEegyu8SpQvgN+kXpQu5jXTtdlx+MIvri7BrDlAnVdveg OxkwZJZ0GRJRMsx+jbdr7zWI9/NalxOQtUtFF3uC3uWtzocmFcfxUc405HvZJBz/bie+ WbRw== X-Gm-Message-State: APjAAAXXPGBh295yrUzmc73UVgsbkAF3neG0NOkAWXh0uQDMcjScyPiU F8G4E/Kc0UJ1WxMO9YQeBx0FrJmiJT1HydvyaJ+G4Q== X-Google-Smtp-Source: APXvYqwzprpUv3Sy57r3sQtteXWHKXfGpdgcIHLQjNVIB2eFN+Njs56UhVpiXHuIqV01MQkxK/5GcVapBZZ9KRKCqd8mXw== X-Received: by 2002:a63:5807:: with SMTP id m7mr17564787pgb.371.1569021587112; Fri, 20 Sep 2019 16:19:47 -0700 (PDT) Date: Fri, 20 Sep 2019 16:19:07 -0700 In-Reply-To: <20190920231923.141900-1-brendanhiggins@google.com> Message-Id: <20190920231923.141900-4-brendanhiggins@google.com> Mime-Version: 1.0 References: <20190920231923.141900-1-brendanhiggins@google.com> X-Mailer: git-send-email 2.23.0.351.gc4317032e6-goog Subject: [PATCH v16 03/19] kunit: test: add string_stream a std::stream like string builder From: Brendan Higgins To: frowand.list@gmail.com, gregkh@linuxfoundation.org, jpoimboe@redhat.com, keescook@google.com, kieran.bingham@ideasonboard.com, mcgrof@kernel.org, peterz@infradead.org, robh@kernel.org, sboyd@kernel.org, shuah@kernel.org, tytso@mit.edu, yamada.masahiro@socionext.com Cc: devicetree@vger.kernel.org, dri-devel@lists.freedesktop.org, kunit-dev@googlegroups.com, linux-doc@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-nvdimm@lists.01.org, linux-um@lists.infradead.org, Alexander.Levin@microsoft.com, Tim.Bird@sony.com, amir73il@gmail.com, dan.carpenter@oracle.com, daniel@ffwll.ch, jdike@addtoit.com, joel@jms.id.au, julia.lawall@lip6.fr, khilman@baylibre.com, knut.omang@oracle.com, logang@deltatee.com, mpe@ellerman.id.au, pmladek@suse.com, rdunlap@infradead.org, richard@nod.at, rientjes@google.com, rostedt@goodmis.org, wfg@linux.intel.com, torvalds@linux-foundation.org, Brendan Higgins , Stephen Boyd Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org A number of test features need to do pretty complicated string printing where it may not be possible to rely on a single preallocated string with parameters. So provide a library for constructing the string as you go similar to C++'s std::string. string_stream is really just a string builder, nothing more. Signed-off-by: Brendan Higgins Reviewed-by: Greg Kroah-Hartman Reviewed-by: Logan Gunthorpe Reviewed-by: Stephen Boyd --- include/kunit/string-stream.h | 51 ++++++++ lib/kunit/Makefile | 3 +- lib/kunit/string-stream.c | 217 ++++++++++++++++++++++++++++++++++ 3 files changed, 270 insertions(+), 1 deletion(-) create mode 100644 include/kunit/string-stream.h create mode 100644 lib/kunit/string-stream.c diff --git a/include/kunit/string-stream.h b/include/kunit/string-stream.h new file mode 100644 index 000000000000..fe98a00b75a9 --- /dev/null +++ b/include/kunit/string-stream.h @@ -0,0 +1,51 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * C++ stream style string builder used in KUnit for building messages. + * + * Copyright (C) 2019, Google LLC. + * Author: Brendan Higgins + */ + +#ifndef _KUNIT_STRING_STREAM_H +#define _KUNIT_STRING_STREAM_H + +#include +#include +#include + +struct string_stream_fragment { + struct kunit *test; + struct list_head node; + char *fragment; +}; + +struct string_stream { + size_t length; + struct list_head fragments; + /* length and fragments are protected by this lock */ + spinlock_t lock; + struct kunit *test; + gfp_t gfp; +}; + +struct kunit; + +struct string_stream *alloc_string_stream(struct kunit *test, gfp_t gfp); + +int __printf(2, 3) string_stream_add(struct string_stream *stream, + const char *fmt, ...); + +int string_stream_vadd(struct string_stream *stream, + const char *fmt, + va_list args); + +char *string_stream_get_string(struct string_stream *stream); + +int string_stream_append(struct string_stream *stream, + struct string_stream *other); + +bool string_stream_is_empty(struct string_stream *stream); + +int string_stream_destroy(struct string_stream *stream); + +#endif /* _KUNIT_STRING_STREAM_H */ diff --git a/lib/kunit/Makefile b/lib/kunit/Makefile index 5efdc4dea2c0..275b565a0e81 100644 --- a/lib/kunit/Makefile +++ b/lib/kunit/Makefile @@ -1 +1,2 @@ -obj-$(CONFIG_KUNIT) += test.o +obj-$(CONFIG_KUNIT) += test.o \ + string-stream.o diff --git a/lib/kunit/string-stream.c b/lib/kunit/string-stream.c new file mode 100644 index 000000000000..e6d17aacca30 --- /dev/null +++ b/lib/kunit/string-stream.c @@ -0,0 +1,217 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * C++ stream style string builder used in KUnit for building messages. + * + * Copyright (C) 2019, Google LLC. + * Author: Brendan Higgins + */ + +#include +#include +#include +#include + +struct string_stream_fragment_alloc_context { + struct kunit *test; + int len; + gfp_t gfp; +}; + +static int string_stream_fragment_init(struct kunit_resource *res, + void *context) +{ + struct string_stream_fragment_alloc_context *ctx = context; + struct string_stream_fragment *frag; + + frag = kunit_kzalloc(ctx->test, sizeof(*frag), ctx->gfp); + if (!frag) + return -ENOMEM; + + frag->test = ctx->test; + frag->fragment = kunit_kmalloc(ctx->test, ctx->len, ctx->gfp); + if (!frag->fragment) + return -ENOMEM; + + res->allocation = frag; + + return 0; +} + +static void string_stream_fragment_free(struct kunit_resource *res) +{ + struct string_stream_fragment *frag = res->allocation; + + list_del(&frag->node); + kunit_kfree(frag->test, frag->fragment); + kunit_kfree(frag->test, frag); +} + +static struct string_stream_fragment *alloc_string_stream_fragment( + struct kunit *test, int len, gfp_t gfp) +{ + struct string_stream_fragment_alloc_context context = { + .test = test, + .len = len, + .gfp = gfp + }; + + return kunit_alloc_resource(test, + string_stream_fragment_init, + string_stream_fragment_free, + gfp, + &context); +} + +static int string_stream_fragment_destroy(struct string_stream_fragment *frag) +{ + return kunit_resource_destroy(frag->test, + kunit_resource_instance_match, + string_stream_fragment_free, + frag); +} + +int string_stream_vadd(struct string_stream *stream, + const char *fmt, + va_list args) +{ + struct string_stream_fragment *frag_container; + int len; + va_list args_for_counting; + + /* Make a copy because `vsnprintf` could change it */ + va_copy(args_for_counting, args); + + /* Need space for null byte. */ + len = vsnprintf(NULL, 0, fmt, args_for_counting) + 1; + + va_end(args_for_counting); + + frag_container = alloc_string_stream_fragment(stream->test, + len, + stream->gfp); + if (!frag_container) + return -ENOMEM; + + len = vsnprintf(frag_container->fragment, len, fmt, args); + spin_lock(&stream->lock); + stream->length += len; + list_add_tail(&frag_container->node, &stream->fragments); + spin_unlock(&stream->lock); + + return 0; +} + +int string_stream_add(struct string_stream *stream, const char *fmt, ...) +{ + va_list args; + int result; + + va_start(args, fmt); + result = string_stream_vadd(stream, fmt, args); + va_end(args); + + return result; +} + +static void string_stream_clear(struct string_stream *stream) +{ + struct string_stream_fragment *frag_container, *frag_container_safe; + + spin_lock(&stream->lock); + list_for_each_entry_safe(frag_container, + frag_container_safe, + &stream->fragments, + node) { + string_stream_fragment_destroy(frag_container); + } + stream->length = 0; + spin_unlock(&stream->lock); +} + +char *string_stream_get_string(struct string_stream *stream) +{ + struct string_stream_fragment *frag_container; + size_t buf_len = stream->length + 1; /* +1 for null byte. */ + char *buf; + + buf = kunit_kzalloc(stream->test, buf_len, stream->gfp); + if (!buf) + return NULL; + + spin_lock(&stream->lock); + list_for_each_entry(frag_container, &stream->fragments, node) + strlcat(buf, frag_container->fragment, buf_len); + spin_unlock(&stream->lock); + + return buf; +} + +int string_stream_append(struct string_stream *stream, + struct string_stream *other) +{ + const char *other_content; + + other_content = string_stream_get_string(other); + + if (!other_content) + return -ENOMEM; + + return string_stream_add(stream, other_content); +} + +bool string_stream_is_empty(struct string_stream *stream) +{ + return list_empty(&stream->fragments); +} + +struct string_stream_alloc_context { + struct kunit *test; + gfp_t gfp; +}; + +static int string_stream_init(struct kunit_resource *res, void *context) +{ + struct string_stream *stream; + struct string_stream_alloc_context *ctx = context; + + stream = kunit_kzalloc(ctx->test, sizeof(*stream), ctx->gfp); + if (!stream) + return -ENOMEM; + + res->allocation = stream; + stream->gfp = ctx->gfp; + stream->test = ctx->test; + INIT_LIST_HEAD(&stream->fragments); + spin_lock_init(&stream->lock); + + return 0; +} + +static void string_stream_free(struct kunit_resource *res) +{ + struct string_stream *stream = res->allocation; + + string_stream_clear(stream); +} + +struct string_stream *alloc_string_stream(struct kunit *test, gfp_t gfp) +{ + struct string_stream_alloc_context context = { + .test = test, + .gfp = gfp + }; + + return kunit_alloc_resource(test, + string_stream_init, + string_stream_free, + gfp, + &context); +} + +int string_stream_destroy(struct string_stream *stream) +{ + return kunit_resource_destroy(stream->test, + kunit_resource_instance_match, + string_stream_free, + stream); +} -- 2.23.0.351.gc4317032e6-goog From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf1-x449.google.com ([2607:f8b0:4864:20::449]) by bombadil.infradead.org with esmtps (Exim 4.92.2 #3 (Red Hat Linux)) id 1iBSBo-0003Da-Uz for linux-um@lists.infradead.org; Fri, 20 Sep 2019 23:19:50 +0000 Received: by mail-pf1-x449.google.com with SMTP id i187so5752158pfc.10 for ; Fri, 20 Sep 2019 16:19:47 -0700 (PDT) Date: Fri, 20 Sep 2019 16:19:07 -0700 In-Reply-To: <20190920231923.141900-1-brendanhiggins@google.com> Message-Id: <20190920231923.141900-4-brendanhiggins@google.com> Mime-Version: 1.0 References: <20190920231923.141900-1-brendanhiggins@google.com> Subject: [PATCH v16 03/19] kunit: test: add string_stream a std::stream like string builder From: Brendan Higgins List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-um" Errors-To: linux-um-bounces+geert=linux-m68k.org@lists.infradead.org To: frowand.list@gmail.com, gregkh@linuxfoundation.org, jpoimboe@redhat.com, keescook@google.com, kieran.bingham@ideasonboard.com, mcgrof@kernel.org, peterz@infradead.org, robh@kernel.org, sboyd@kernel.org, shuah@kernel.org, tytso@mit.edu, yamada.masahiro@socionext.com Cc: pmladek@suse.com, linux-doc@vger.kernel.org, amir73il@gmail.com, Brendan Higgins , dri-devel@lists.freedesktop.org, Alexander.Levin@microsoft.com, linux-kselftest@vger.kernel.org, linux-nvdimm@lists.01.org, khilman@baylibre.com, knut.omang@oracle.com, wfg@linux.intel.com, joel@jms.id.au, rientjes@google.com, jdike@addtoit.com, dan.carpenter@oracle.com, devicetree@vger.kernel.org, linux-kbuild@vger.kernel.org, Tim.Bird@sony.com, linux-um@lists.infradead.org, rostedt@goodmis.org, Stephen Boyd , julia.lawall@lip6.fr, kunit-dev@googlegroups.com, richard@nod.at, torvalds@linux-foundation.org, rdunlap@infradead.org, linux-kernel@vger.kernel.org, daniel@ffwll.ch, mpe@ellerman.id.au, linux-fsdevel@vger.kernel.org, logang@deltatee.com A number of test features need to do pretty complicated string printing where it may not be possible to rely on a single preallocated string with parameters. So provide a library for constructing the string as you go similar to C++'s std::string. string_stream is really just a string builder, nothing more. Signed-off-by: Brendan Higgins Reviewed-by: Greg Kroah-Hartman Reviewed-by: Logan Gunthorpe Reviewed-by: Stephen Boyd --- include/kunit/string-stream.h | 51 ++++++++ lib/kunit/Makefile | 3 +- lib/kunit/string-stream.c | 217 ++++++++++++++++++++++++++++++++++ 3 files changed, 270 insertions(+), 1 deletion(-) create mode 100644 include/kunit/string-stream.h create mode 100644 lib/kunit/string-stream.c diff --git a/include/kunit/string-stream.h b/include/kunit/string-stream.h new file mode 100644 index 000000000000..fe98a00b75a9 --- /dev/null +++ b/include/kunit/string-stream.h @@ -0,0 +1,51 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * C++ stream style string builder used in KUnit for building messages. + * + * Copyright (C) 2019, Google LLC. + * Author: Brendan Higgins + */ + +#ifndef _KUNIT_STRING_STREAM_H +#define _KUNIT_STRING_STREAM_H + +#include +#include +#include + +struct string_stream_fragment { + struct kunit *test; + struct list_head node; + char *fragment; +}; + +struct string_stream { + size_t length; + struct list_head fragments; + /* length and fragments are protected by this lock */ + spinlock_t lock; + struct kunit *test; + gfp_t gfp; +}; + +struct kunit; + +struct string_stream *alloc_string_stream(struct kunit *test, gfp_t gfp); + +int __printf(2, 3) string_stream_add(struct string_stream *stream, + const char *fmt, ...); + +int string_stream_vadd(struct string_stream *stream, + const char *fmt, + va_list args); + +char *string_stream_get_string(struct string_stream *stream); + +int string_stream_append(struct string_stream *stream, + struct string_stream *other); + +bool string_stream_is_empty(struct string_stream *stream); + +int string_stream_destroy(struct string_stream *stream); + +#endif /* _KUNIT_STRING_STREAM_H */ diff --git a/lib/kunit/Makefile b/lib/kunit/Makefile index 5efdc4dea2c0..275b565a0e81 100644 --- a/lib/kunit/Makefile +++ b/lib/kunit/Makefile @@ -1 +1,2 @@ -obj-$(CONFIG_KUNIT) += test.o +obj-$(CONFIG_KUNIT) += test.o \ + string-stream.o diff --git a/lib/kunit/string-stream.c b/lib/kunit/string-stream.c new file mode 100644 index 000000000000..e6d17aacca30 --- /dev/null +++ b/lib/kunit/string-stream.c @@ -0,0 +1,217 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * C++ stream style string builder used in KUnit for building messages. + * + * Copyright (C) 2019, Google LLC. + * Author: Brendan Higgins + */ + +#include +#include +#include +#include + +struct string_stream_fragment_alloc_context { + struct kunit *test; + int len; + gfp_t gfp; +}; + +static int string_stream_fragment_init(struct kunit_resource *res, + void *context) +{ + struct string_stream_fragment_alloc_context *ctx = context; + struct string_stream_fragment *frag; + + frag = kunit_kzalloc(ctx->test, sizeof(*frag), ctx->gfp); + if (!frag) + return -ENOMEM; + + frag->test = ctx->test; + frag->fragment = kunit_kmalloc(ctx->test, ctx->len, ctx->gfp); + if (!frag->fragment) + return -ENOMEM; + + res->allocation = frag; + + return 0; +} + +static void string_stream_fragment_free(struct kunit_resource *res) +{ + struct string_stream_fragment *frag = res->allocation; + + list_del(&frag->node); + kunit_kfree(frag->test, frag->fragment); + kunit_kfree(frag->test, frag); +} + +static struct string_stream_fragment *alloc_string_stream_fragment( + struct kunit *test, int len, gfp_t gfp) +{ + struct string_stream_fragment_alloc_context context = { + .test = test, + .len = len, + .gfp = gfp + }; + + return kunit_alloc_resource(test, + string_stream_fragment_init, + string_stream_fragment_free, + gfp, + &context); +} + +static int string_stream_fragment_destroy(struct string_stream_fragment *frag) +{ + return kunit_resource_destroy(frag->test, + kunit_resource_instance_match, + string_stream_fragment_free, + frag); +} + +int string_stream_vadd(struct string_stream *stream, + const char *fmt, + va_list args) +{ + struct string_stream_fragment *frag_container; + int len; + va_list args_for_counting; + + /* Make a copy because `vsnprintf` could change it */ + va_copy(args_for_counting, args); + + /* Need space for null byte. */ + len = vsnprintf(NULL, 0, fmt, args_for_counting) + 1; + + va_end(args_for_counting); + + frag_container = alloc_string_stream_fragment(stream->test, + len, + stream->gfp); + if (!frag_container) + return -ENOMEM; + + len = vsnprintf(frag_container->fragment, len, fmt, args); + spin_lock(&stream->lock); + stream->length += len; + list_add_tail(&frag_container->node, &stream->fragments); + spin_unlock(&stream->lock); + + return 0; +} + +int string_stream_add(struct string_stream *stream, const char *fmt, ...) +{ + va_list args; + int result; + + va_start(args, fmt); + result = string_stream_vadd(stream, fmt, args); + va_end(args); + + return result; +} + +static void string_stream_clear(struct string_stream *stream) +{ + struct string_stream_fragment *frag_container, *frag_container_safe; + + spin_lock(&stream->lock); + list_for_each_entry_safe(frag_container, + frag_container_safe, + &stream->fragments, + node) { + string_stream_fragment_destroy(frag_container); + } + stream->length = 0; + spin_unlock(&stream->lock); +} + +char *string_stream_get_string(struct string_stream *stream) +{ + struct string_stream_fragment *frag_container; + size_t buf_len = stream->length + 1; /* +1 for null byte. */ + char *buf; + + buf = kunit_kzalloc(stream->test, buf_len, stream->gfp); + if (!buf) + return NULL; + + spin_lock(&stream->lock); + list_for_each_entry(frag_container, &stream->fragments, node) + strlcat(buf, frag_container->fragment, buf_len); + spin_unlock(&stream->lock); + + return buf; +} + +int string_stream_append(struct string_stream *stream, + struct string_stream *other) +{ + const char *other_content; + + other_content = string_stream_get_string(other); + + if (!other_content) + return -ENOMEM; + + return string_stream_add(stream, other_content); +} + +bool string_stream_is_empty(struct string_stream *stream) +{ + return list_empty(&stream->fragments); +} + +struct string_stream_alloc_context { + struct kunit *test; + gfp_t gfp; +}; + +static int string_stream_init(struct kunit_resource *res, void *context) +{ + struct string_stream *stream; + struct string_stream_alloc_context *ctx = context; + + stream = kunit_kzalloc(ctx->test, sizeof(*stream), ctx->gfp); + if (!stream) + return -ENOMEM; + + res->allocation = stream; + stream->gfp = ctx->gfp; + stream->test = ctx->test; + INIT_LIST_HEAD(&stream->fragments); + spin_lock_init(&stream->lock); + + return 0; +} + +static void string_stream_free(struct kunit_resource *res) +{ + struct string_stream *stream = res->allocation; + + string_stream_clear(stream); +} + +struct string_stream *alloc_string_stream(struct kunit *test, gfp_t gfp) +{ + struct string_stream_alloc_context context = { + .test = test, + .gfp = gfp + }; + + return kunit_alloc_resource(test, + string_stream_init, + string_stream_free, + gfp, + &context); +} + +int string_stream_destroy(struct string_stream *stream) +{ + return kunit_resource_destroy(stream->test, + kunit_resource_instance_match, + string_stream_free, + stream); +} -- 2.23.0.351.gc4317032e6-goog _______________________________________________ linux-um mailing list linux-um@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-um