From 3a445acb491131c27636363eff607cf2344e1cf3 Mon Sep 17 00:00:00 2001 From: Mahmoud Mandour Date: Fri, 30 Jul 2021 15:58:05 +0200 Subject: [PATCH] plugins: allow plugin arguments to be passed directly MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Passing arguments to plugins had to be done through "arg=". This is redundant and introduces confusion especially when the argument has a name and value (e.g. `-plugin plugin_name,arg="argname=argvalue"`). This allows passing plugin arguments directly e.g: `-plugin plugin_name,argname=argvalue` For now, passing arguments through "arg=" is still supports but outputs a deprecation warning. Also, this commit makes boolean arguments passed to plugins in the `argname=on|off` form instead of the deprecated short-boolean form. Signed-off-by: Mahmoud Mandour Tested-by: Alex Bennée Reviewed-by: Alex Bennée Signed-off-by: Alex Bennée Message-Id: <20210730135817.17816-2-ma.mandourr@gmail.com> --- linux-user/main.c | 2 +- plugins/loader.c | 24 ++++++++++++++++++++---- qemu-options.hx | 9 ++++----- 3 files changed, 25 insertions(+), 10 deletions(-) diff --git a/linux-user/main.c b/linux-user/main.c index 37ed50d98e..a6094563b6 100644 --- a/linux-user/main.c +++ b/linux-user/main.c @@ -463,7 +463,7 @@ static const struct qemu_argument arg_table[] = { "", "[[enable=]][,events=][,file=]"}, #ifdef CONFIG_PLUGIN {"plugin", "QEMU_PLUGIN", true, handle_arg_plugin, - "", "[file=][,arg=]"}, + "", "[file=][,=]"}, #endif {"version", "QEMU_VERSION", false, handle_arg_version, "", "display version information and exit"}, diff --git a/plugins/loader.c b/plugins/loader.c index 05df40398d..a4ec281692 100644 --- a/plugins/loader.c +++ b/plugins/loader.c @@ -94,6 +94,8 @@ static int plugin_add(void *opaque, const char *name, const char *value, { struct qemu_plugin_parse_arg *arg = opaque; struct qemu_plugin_desc *p; + bool is_on; + char *fullarg; if (strcmp(name, "file") == 0) { if (strcmp(value, "") == 0) { @@ -107,18 +109,32 @@ static int plugin_add(void *opaque, const char *name, const char *value, QTAILQ_INSERT_TAIL(arg->head, p, entry); } arg->curr = p; - } else if (strcmp(name, "arg") == 0) { + } else { if (arg->curr == NULL) { error_setg(errp, "missing earlier '-plugin file=' option"); return 1; } + + if (g_strcmp0(name, "arg") == 0 && + !qapi_bool_parse(name, value, &is_on, NULL)) { + if (strchr(value, '=') == NULL) { + /* Will treat arg="argname" as "argname=on" */ + fullarg = g_strdup_printf("%s=%s", value, "on"); + } else { + fullarg = g_strdup_printf("%s", value); + } + warn_report("using 'arg=%s' is deprecated", value); + error_printf("Please use '%s' directly\n", fullarg); + } else { + fullarg = g_strdup_printf("%s=%s", name, value); + } + p = arg->curr; p->argc++; p->argv = g_realloc_n(p->argv, p->argc, sizeof(char *)); - p->argv[p->argc - 1] = g_strdup(value); - } else { - error_setg(errp, "-plugin: unexpected parameter '%s'; ignored", name); + p->argv[p->argc - 1] = fullarg; } + return 0; } diff --git a/qemu-options.hx b/qemu-options.hx index 83aa59a920..4a9ee722c9 100644 --- a/qemu-options.hx +++ b/qemu-options.hx @@ -4532,19 +4532,18 @@ SRST ERST DEF("plugin", HAS_ARG, QEMU_OPTION_plugin, - "-plugin [file=][,arg=]\n" + "-plugin [file=][,=]\n" " load a plugin\n", QEMU_ARCH_ALL) SRST -``-plugin file=file[,arg=string]`` +``-plugin file=file[,argname=argvalue]`` Load a plugin. ``file=file`` Load the given plugin from a shared library file. - ``arg=string`` - Argument string passed to the plugin. (Can be given multiple - times.) + ``argname=argvalue`` + Argument passed to the plugin. (Can be given multiple times.) ERST HXCOMM Internal use