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envelope-from=steven.sistare@oracle.com; helo=mx0a-00069f02.pphosted.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_MED=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Generalize hmp_split_at_comma() to take any delimiter string, rename as str_split(), and move it to util/strList.c. No functional change. Signed-off-by: Steve Sistare Reviewed-by: Philippe Mathieu-Daudé --- include/monitor/hmp.h | 1 - include/qemu/strList.h | 24 ++++++++++++++++++++++++ monitor/hmp-cmds.c | 19 ------------------- net/net-hmp-cmds.c | 3 ++- stats/stats-hmp-cmds.c | 3 ++- util/meson.build | 1 + util/strList.c | 24 ++++++++++++++++++++++++ 7 files changed, 53 insertions(+), 22 deletions(-) create mode 100644 include/qemu/strList.h create mode 100644 util/strList.c diff --git a/include/monitor/hmp.h b/include/monitor/hmp.h index 13f9a2d..2df661e 100644 --- a/include/monitor/hmp.h +++ b/include/monitor/hmp.h @@ -19,7 +19,6 @@ bool hmp_handle_error(Monitor *mon, Error *err); void hmp_help_cmd(Monitor *mon, const char *name); -strList *hmp_split_at_comma(const char *str); void hmp_info_name(Monitor *mon, const QDict *qdict); void hmp_info_version(Monitor *mon, const QDict *qdict); diff --git a/include/qemu/strList.h b/include/qemu/strList.h new file mode 100644 index 0000000..0f26116 --- /dev/null +++ b/include/qemu/strList.h @@ -0,0 +1,24 @@ +/* + * Copyright (c) 2022 - 2024 Oracle and/or its affiliates. + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + */ + +#ifndef QEMU_STR_LIST_H +#define QEMU_STR_LIST_H + +#include "qapi/qapi-builtin-types.h" + +/* + * Split @str into a strList using the delimiter string @delim. + * The delimiter is not included in the result. + * Return NULL if @str is NULL or an empty string. + * A leading, trailing, or consecutive delimiter produces an + * empty string at that position in the output. + * All strings are g_strdup'd, and the result can be freed + * using qapi_free_strList. + */ +strList *str_split(const char *str, const char *delim); + +#endif diff --git a/monitor/hmp-cmds.c b/monitor/hmp-cmds.c index 871898a..66b68a0 100644 --- a/monitor/hmp-cmds.c +++ b/monitor/hmp-cmds.c @@ -38,25 +38,6 @@ bool hmp_handle_error(Monitor *mon, Error *err) return false; } -/* - * Split @str at comma. - * A null @str defaults to "". - */ -strList *hmp_split_at_comma(const char *str) -{ - char **split = g_strsplit(str ?: "", ",", -1); - strList *res = NULL; - strList **tail = &res; - int i; - - for (i = 0; split[i]; i++) { - QAPI_LIST_APPEND(tail, split[i]); - } - - g_free(split); - return res; -} - void hmp_info_name(Monitor *mon, const QDict *qdict) { NameInfo *info; diff --git a/net/net-hmp-cmds.c b/net/net-hmp-cmds.c index 41d326b..969cdd1 100644 --- a/net/net-hmp-cmds.c +++ b/net/net-hmp-cmds.c @@ -26,6 +26,7 @@ #include "qemu/config-file.h" #include "qemu/help_option.h" #include "qemu/option.h" +#include "qemu/strList.h" void hmp_info_network(Monitor *mon, const QDict *qdict) { @@ -72,7 +73,7 @@ void hmp_announce_self(Monitor *mon, const QDict *qdict) migrate_announce_params()); qapi_free_strList(params->interfaces); - params->interfaces = hmp_split_at_comma(interfaces_str); + params->interfaces = str_split(interfaces_str, ","); params->has_interfaces = params->interfaces != NULL; params->id = g_strdup(id); qmp_announce_self(params, NULL); diff --git a/stats/stats-hmp-cmds.c b/stats/stats-hmp-cmds.c index 1f91bf8..62db8c6 100644 --- a/stats/stats-hmp-cmds.c +++ b/stats/stats-hmp-cmds.c @@ -10,6 +10,7 @@ #include "monitor/hmp.h" #include "monitor/monitor.h" #include "qemu/cutils.h" +#include "qemu/strList.h" #include "hw/core/cpu.h" #include "qapi/qmp/qdict.h" #include "qapi/error.h" @@ -176,7 +177,7 @@ static StatsFilter *stats_filter(StatsTarget target, const char *names, request->provider = provider_idx; if (names && !g_str_equal(names, "*")) { request->has_names = true; - request->names = hmp_split_at_comma(names); + request->names = str_split(names, ","); } QAPI_LIST_PREPEND(request_list, request); } diff --git a/util/meson.build b/util/meson.build index 0ef9886..bd125a4 100644 --- a/util/meson.build +++ b/util/meson.build @@ -1,4 +1,5 @@ util_ss.add(files('osdep.c', 'cutils.c', 'unicode.c', 'qemu-timer-common.c')) +util_ss.add(files('strList.c')) util_ss.add(files('thread-context.c'), numa) if not config_host_data.get('CONFIG_ATOMIC64') util_ss.add(files('atomic64.c')) diff --git a/util/strList.c b/util/strList.c new file mode 100644 index 0000000..7588c7c --- /dev/null +++ b/util/strList.c @@ -0,0 +1,24 @@ +/* + * Copyright (c) 2023 Red Hat, Inc. + * Copyright (c) 2022 - 2024 Oracle and/or its affiliates. + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + */ + +#include "qemu/osdep.h" +#include "qemu/strList.h" + +strList *str_split(const char *str, const char *delim) +{ + g_autofree char **split = g_strsplit(str ?: "", delim, -1); + strList *res = NULL; + strList **tail = &res; + int i; + + for (i = 0; split[i]; i++) { + QAPI_LIST_APPEND(tail, split[i]); + } + + return res; +} From patchwork Thu Feb 22 21:47:47 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Steven Sistare X-Patchwork-Id: 13568172 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 lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id BDD6CC54E49 for ; Thu, 22 Feb 2024 21:49:04 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rdGvY-0000sG-6k; Thu, 22 Feb 2024 16:48:25 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rdGvS-0000pO-QJ for qemu-devel@nongnu.org; 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(tail) = &(*(tail))->next; \ } while (0) +/* + * For any GenericList @list, return its length. + */ +#define QAPI_LIST_LENGTH(list) \ + ({ \ + size_t _len = 0; \ + typeof(list) _tail; \ + for (_tail = list; _tail != NULL; _tail = _tail->next) { \ + _len++; \ + } \ + _len; \ + }) + #endif From patchwork Thu Feb 22 21:47:48 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Steven Sistare X-Patchwork-Id: 13568175 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 lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E37A1C47DD9 for ; Thu, 22 Feb 2024 21:49:18 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rdGvi-0000td-Dg; 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+/* + * Produce and return a NULL-terminated array of strings from @list. + * The result is g_malloc'd and all strings are g_strdup'd. + */ +char **strv_from_strList(const strList *list); + #endif diff --git a/util/strList.c b/util/strList.c index 7588c7c..6da6762 100644 --- a/util/strList.c +++ b/util/strList.c @@ -22,3 +22,17 @@ strList *str_split(const char *str, const char *delim) return res; } + +char **strv_from_strList(const strList *list) +{ + const strList *tail; + int i = 0; + char **argv = g_new(char *, QAPI_LIST_LENGTH(list) + 1); + + for (tail = list; tail != NULL; tail = tail->next) { + argv[i++] = g_strdup(tail->value); + } + argv[i] = NULL; + + return argv; +} From patchwork Thu Feb 22 21:47:49 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Steven Sistare X-Patchwork-Id: 13568173 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 lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id C07AFC54E4A for ; 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+ + while (length--) { + list = *prev = g_new0(strList, 1); + list->value = g_strdup("aaa"); + prev = &list->next; + } + return head; +} + +static void test_length(void) +{ + strList *list; + int i; + + for (i = 0; i < 5; i++) { + list = make_list(i); + g_assert_cmpint(i, ==, QAPI_LIST_LENGTH(list)); + qapi_free_strList(list); + } +} + +struct { + const char *string; + const char *delim; + const char *argv[5]; +} list_data[] = { + { NULL, ",", { NULL } }, + { "", ",", { NULL } }, + { "a", ",", { "a", NULL } }, + { "a,b", ",", { "a", "b", NULL } }, + { "a,b,c", ",", { "a", "b", "c", NULL } }, + { "first last", " ", { "first", "last", NULL } }, + { "a:", ":", { "a", "", NULL } }, + { "a::b", ":", { "a", "", "b", NULL } }, + { ":", ":", { "", "", NULL } }, + { ":a", ":", { "", "a", NULL } }, + { "::a", ":", { "", "", "a", NULL } }, +}; + +static void test_strv(void) +{ + int i, j; + const char **expect; + strList *list; + char **argv; + + for (i = 0; i < ARRAY_SIZE(list_data); i++) { + expect = list_data[i].argv; + list = str_split(list_data[i].string, list_data[i].delim); + argv = strv_from_strList(list); + qapi_free_strList(list); + for (j = 0; expect[j] && argv[j]; j++) { + g_assert_cmpstr(expect[j], ==, argv[j]); + } + g_assert_null(expect[j]); + g_assert_null(argv[j]); + g_strfreev(argv); + } +} + +int main(int argc, char **argv) +{ + g_test_init(&argc, &argv, NULL); + g_test_add_func("/test-string/length", test_length); + g_test_add_func("/test-string/strv", test_strv); + return g_test_run(); +} From patchwork Thu Feb 22 21:47:50 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Steven Sistare X-Patchwork-Id: 13568174 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 lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id BAB93C47DD9 for ; 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Thu, 22 Feb 2024 21:47:58 +0000 Received: from iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com (iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 41MLlqUH037274; Thu, 22 Feb 2024 21:47:58 GMT Received: from ca-dev63.us.oracle.com (ca-dev63.us.oracle.com [10.211.8.221]) by iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTP id 3wak8bft40-6; Thu, 22 Feb 2024 21:47:58 +0000 From: Steve Sistare To: qemu-devel@nongnu.org Cc: Markus Armbruster , Michael Roth , Peter Xu , Fabiano Rosas , =?utf-8?q?Marc-Andr=C3=A9_Lureau?= , Steve Sistare Subject: [PATCH V5 5/5] migration: simplify exec migration functions Date: Thu, 22 Feb 2024 13:47:50 -0800 Message-Id: <1708638470-114846-6-git-send-email-steven.sistare@oracle.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1708638470-114846-1-git-send-email-steven.sistare@oracle.com> References: <1708638470-114846-1-git-send-email-steven.sistare@oracle.com> X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.1011,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2024-02-22_15,2024-02-22_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 malwarescore=0 suspectscore=0 mlxscore=0 spamscore=0 mlxlogscore=999 phishscore=0 bulkscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311290000 definitions=main-2402220169 X-Proofpoint-GUID: TDdBlGcP0R9rqKEUyAAGzTkjC2x-rghH X-Proofpoint-ORIG-GUID: TDdBlGcP0R9rqKEUyAAGzTkjC2x-rghH Received-SPF: pass client-ip=205.220.177.32; envelope-from=steven.sistare@oracle.com; helo=mx0b-00069f02.pphosted.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_MED=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Simplify the exec migration code by using list utility functions. As a side effect, this also fixes a minor memory leak. On function return, "g_auto(GStrv) argv" frees argv and each element, which is wrong, because the function does not own the individual elements. To compensate, the code uses g_steal_pointer which NULLs argv and prevents the destructor from running, but argv is leaked. Fixes: cbab4face57b ("migration: convert exec backend ...") Signed-off-by: Steve Sistare Reviewed-by: Fabiano Rosas --- migration/exec.c | 57 ++++++++------------------------------------------------ 1 file changed, 8 insertions(+), 49 deletions(-) diff --git a/migration/exec.c b/migration/exec.c index 47d2f3b..1518409 100644 --- a/migration/exec.c +++ b/migration/exec.c @@ -19,6 +19,7 @@ #include "qemu/osdep.h" #include "qemu/error-report.h" +#include "qemu/strList.h" #include "channel.h" #include "exec.h" #include "migration.h" @@ -39,51 +40,16 @@ const char *exec_get_cmd_path(void) } #endif -/* provides the length of strList */ -static int -str_list_length(strList *list) -{ - int len = 0; - strList *elem; - - for (elem = list; elem != NULL; elem = elem->next) { - len++; - } - - return len; -} - -static void -init_exec_array(strList *command, char **argv, Error **errp) -{ - int i = 0; - strList *lst; - - for (lst = command; lst; lst = lst->next) { - argv[i++] = lst->value; - } - - argv[i] = NULL; - return; -} - void exec_start_outgoing_migration(MigrationState *s, strList *command, Error **errp) { - QIOChannel *ioc; - - int length = str_list_length(command); - g_auto(GStrv) argv = (char **) g_new0(const char *, length + 1); - - init_exec_array(command, argv, errp); + QIOChannel *ioc = NULL; + g_auto(GStrv) argv = strv_from_strList(command); + const char * const *args = (const char * const *) argv; g_autofree char *new_command = g_strjoinv(" ", (char **)argv); trace_migration_exec_outgoing(new_command); - ioc = QIO_CHANNEL( - qio_channel_command_new_spawn( - (const char * const *) g_steal_pointer(&argv), - O_RDWR, - errp)); + ioc = QIO_CHANNEL(qio_channel_command_new_spawn(args, O_RDWR, errp)); if (!ioc) { return; } @@ -105,19 +71,12 @@ static gboolean exec_accept_incoming_migration(QIOChannel *ioc, void exec_start_incoming_migration(strList *command, Error **errp) { QIOChannel *ioc; - - int length = str_list_length(command); - g_auto(GStrv) argv = (char **) g_new0(const char *, length + 1); - - init_exec_array(command, argv, errp); + g_auto(GStrv) argv = strv_from_strList(command); + const char * const *args = (const char * const *) argv; g_autofree char *new_command = g_strjoinv(" ", (char **)argv); trace_migration_exec_incoming(new_command); - ioc = QIO_CHANNEL( - qio_channel_command_new_spawn( - (const char * const *) g_steal_pointer(&argv), - O_RDWR, - errp)); + ioc = QIO_CHANNEL(qio_channel_command_new_spawn(args, O_RDWR, errp)); if (!ioc) { return; }