From 0572f558cbc45acdd13ae3548c06ce650641f292 Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Tue, 27 Oct 2020 04:58:26 -0400 Subject: [PATCH] plugin: propagate errors qemu_finish_machine_init currently can only exit QEMU if it fails. Prepare for giving it proper error propagation, and possibly for adding a plugin_add monitor command that calls an accelerator method. While at it, make all errors from plugin_load look the same. Reviewed-by: Igor Mammedov Signed-off-by: Paolo Bonzini --- include/qemu/plugin.h | 4 ++-- linux-user/main.c | 4 +--- plugins/loader.c | 34 +++++++++++++++++----------------- softmmu/vl.c | 4 +--- 4 files changed, 21 insertions(+), 25 deletions(-) diff --git a/include/qemu/plugin.h b/include/qemu/plugin.h index ab790ad105..841deed79c 100644 --- a/include/qemu/plugin.h +++ b/include/qemu/plugin.h @@ -45,7 +45,7 @@ static inline void qemu_plugin_add_opts(void) } void qemu_plugin_opt_parse(const char *optarg, QemuPluginList *head); -int qemu_plugin_load_list(QemuPluginList *head); +int qemu_plugin_load_list(QemuPluginList *head, Error **errp); union qemu_plugin_cb_sig { qemu_plugin_simple_cb_t simple; @@ -199,7 +199,7 @@ static inline void qemu_plugin_opt_parse(const char *optarg, exit(1); } -static inline int qemu_plugin_load_list(QemuPluginList *head) +static inline int qemu_plugin_load_list(QemuPluginList *head, Error **errp) { return 0; } diff --git a/linux-user/main.c b/linux-user/main.c index 24d1eb73ad..750a01118f 100644 --- a/linux-user/main.c +++ b/linux-user/main.c @@ -671,9 +671,7 @@ int main(int argc, char **argv, char **envp) exit(1); } trace_init_file(); - if (qemu_plugin_load_list(&plugins)) { - exit(1); - } + qemu_plugin_load_list(&plugins, &error_fatal); /* Zero out regs */ memset(regs, 0, sizeof(struct target_pt_regs)); diff --git a/plugins/loader.c b/plugins/loader.c index 8ac5dbc20f..5cb9794fda 100644 --- a/plugins/loader.c +++ b/plugins/loader.c @@ -150,7 +150,7 @@ static uint64_t xorshift64star(uint64_t x) return x * UINT64_C(2685821657736338717); } -static int plugin_load(struct qemu_plugin_desc *desc, const qemu_info_t *info) +static int plugin_load(struct qemu_plugin_desc *desc, const qemu_info_t *info, Error **errp) { qemu_plugin_install_func_t install; struct qemu_plugin_ctx *ctx; @@ -163,37 +163,37 @@ static int plugin_load(struct qemu_plugin_desc *desc, const qemu_info_t *info) ctx->handle = g_module_open(desc->path, G_MODULE_BIND_LOCAL); if (ctx->handle == NULL) { - error_report("%s: %s", __func__, g_module_error()); + error_setg(errp, "Could not load plugin %s: %s", desc->path, g_module_error()); goto err_dlopen; } if (!g_module_symbol(ctx->handle, "qemu_plugin_install", &sym)) { - error_report("%s: %s", __func__, g_module_error()); + error_setg(errp, "Could not load plugin %s: %s", desc->path, g_module_error()); goto err_symbol; } install = (qemu_plugin_install_func_t) sym; /* symbol was found; it could be NULL though */ if (install == NULL) { - error_report("%s: %s: qemu_plugin_install is NULL", - __func__, desc->path); + error_setg(errp, "Could not load plugin %s: qemu_plugin_install is NULL", + desc->path); goto err_symbol; } if (!g_module_symbol(ctx->handle, "qemu_plugin_version", &sym)) { - error_report("TCG plugin %s does not declare API version %s", - desc->path, g_module_error()); + error_setg(errp, "Could not load plugin %s: plugin does not declare API version %s", + desc->path, g_module_error()); goto err_symbol; } else { int version = *(int *)sym; if (version < QEMU_PLUGIN_MIN_VERSION) { - error_report("TCG plugin %s requires API version %d, but " - "this QEMU supports only a minimum version of %d", - desc->path, version, QEMU_PLUGIN_MIN_VERSION); + error_setg(errp, "Could not load plugin %s: plugin requires API version %d, but " + "this QEMU supports only a minimum version of %d", + desc->path, version, QEMU_PLUGIN_MIN_VERSION); goto err_symbol; } else if (version > QEMU_PLUGIN_VERSION) { - error_report("TCG plugin %s requires API version %d, but " - "this QEMU supports only up to version %d", - desc->path, version, QEMU_PLUGIN_VERSION); + error_setg(errp, "Could not load plugin %s: plugin requires API version %d, but " + "this QEMU supports only up to version %d", + desc->path, version, QEMU_PLUGIN_VERSION); goto err_symbol; } } @@ -220,8 +220,8 @@ static int plugin_load(struct qemu_plugin_desc *desc, const qemu_info_t *info) rc = install(ctx->id, info, desc->argc, desc->argv); ctx->installing = false; if (rc) { - error_report("%s: qemu_plugin_install returned error code %d", - __func__, rc); + error_setg(errp, "Could not load plugin %s: qemu_plugin_install returned error code %d", + desc->path, rc); /* * we cannot rely on the plugin doing its own cleanup, so * call a full uninstall if the plugin did not yet call it. @@ -263,7 +263,7 @@ static void plugin_desc_free(struct qemu_plugin_desc *desc) * Note: the descriptor of each successfully installed plugin is removed * from the list given by @head. */ -int qemu_plugin_load_list(QemuPluginList *head) +int qemu_plugin_load_list(QemuPluginList *head, Error **errp) { struct qemu_plugin_desc *desc, *next; g_autofree qemu_info_t *info = g_new0(qemu_info_t, 1); @@ -283,7 +283,7 @@ int qemu_plugin_load_list(QemuPluginList *head) QTAILQ_FOREACH_SAFE(desc, head, entry, next) { int err; - err = plugin_load(desc, info); + err = plugin_load(desc, info, errp); if (err) { return err; } diff --git a/softmmu/vl.c b/softmmu/vl.c index 0f7222af31..553482ec02 100644 --- a/softmmu/vl.c +++ b/softmmu/vl.c @@ -2416,9 +2416,7 @@ static void qemu_init_board(void) } /* process plugin before CPUs are created, but once -smp has been parsed */ - if (qemu_plugin_load_list(&plugin_list)) { - exit(1); - } + qemu_plugin_load_list(&plugin_list, &error_fatal); /* From here on we enter MACHINE_PHASE_INITIALIZED. */ machine_run_board_init(current_machine);