From patchwork Tue Apr 5 02:27:03 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Linyu Yuan X-Patchwork-Id: 12801000 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 17C57C433F5 for ; Tue, 5 Apr 2022 02:48:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230263AbiDECuW (ORCPT ); Mon, 4 Apr 2022 22:50:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48128 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230121AbiDECuM (ORCPT ); Mon, 4 Apr 2022 22:50:12 -0400 Received: from alexa-out-sd-02.qualcomm.com (alexa-out-sd-02.qualcomm.com [199.106.114.39]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8DFFBE0AE3 for ; Mon, 4 Apr 2022 19:27:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; i=@quicinc.com; q=dns/txt; s=qcdkim; t=1649125637; x=1680661637; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=psfu01lJ1JBERxTudeyZgjoY+ClMj3B8i5GvLU7ahC0=; b=VLjHeDz/w/FtBwBEM3kVPa68bCvxeKk2THfSv/mvF6nq9tqpAgwUbb1K fg2K4YjuwlHAa/VQRqJOSnxjWjV7m4sm3JnRvXK0LVEjQYyVybjK46K08 XZgUyDTabiuOr24rPYEFb/lj+tHH6OCQKNntQINlviyVZLKbFtxGkp/Zy Y=; Received: from unknown (HELO ironmsg04-sd.qualcomm.com) ([10.53.140.144]) by alexa-out-sd-02.qualcomm.com with ESMTP; 04 Apr 2022 19:27:17 -0700 X-QCInternal: smtphost Received: from nasanex01c.na.qualcomm.com ([10.47.97.222]) by ironmsg04-sd.qualcomm.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 04 Apr 2022 19:27:17 -0700 Received: from nalasex01b.na.qualcomm.com (10.47.209.197) by nasanex01c.na.qualcomm.com (10.47.97.222) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.22; Mon, 4 Apr 2022 19:27:17 -0700 Received: from linyyuan-gv.qualcomm.com (10.80.80.8) by nalasex01b.na.qualcomm.com (10.47.209.197) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.22; Mon, 4 Apr 2022 19:27:15 -0700 From: Linyu Yuan To: Felipe Balbi , Greg Kroah-Hartman CC: , Jack Pham , "Linyu Yuan" Subject: [PATCH v5 3/5] usb: gadget: add trace event of configfs group operation Date: Tue, 5 Apr 2022 10:27:03 +0800 Message-ID: <1649125625-7003-4-git-send-email-quic_linyyuan@quicinc.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1649125625-7003-1-git-send-email-quic_linyyuan@quicinc.com> References: <1649125625-7003-1-git-send-email-quic_linyyuan@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nalasex01b.na.qualcomm.com (10.47.209.197) Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Add API trace_usb_configfs_make_group() and trace_usb_configfs_drop_group() to trace user create groups like gadget/function/configuration, it also trace group create in a specific function. Signed-off-by: Linyu Yuan --- v2: no change v3: add API in trace.c v4: fix memory leak v5: change return value which report by kernel test robot and Dan Carpenter drivers/usb/gadget/configfs.c | 11 ++++ drivers/usb/gadget/function/f_mass_storage.c | 4 ++ drivers/usb/gadget/function/uvc_configfs.c | 12 ++++ drivers/usb/gadget/trace.c | 83 ++++++++++++++++++++++++++++ include/linux/usb/composite.h | 9 +++ include/linux/usb/gadget_configfs.h | 2 + 6 files changed, 121 insertions(+) diff --git a/drivers/usb/gadget/configfs.c b/drivers/usb/gadget/configfs.c index b2beeda..a0599fb 100644 --- a/drivers/usb/gadget/configfs.c +++ b/drivers/usb/gadget/configfs.c @@ -621,6 +621,8 @@ static struct config_group *function_make( gi = container_of(group, struct gadget_info, functions_group); + trace_usb_configfs_make_group(&group->cg_item, &fi->group.cg_item); + mutex_lock(&gi->lock); list_add_tail(&fi->cfs_list, &gi->available_func); mutex_unlock(&gi->lock); @@ -634,6 +636,8 @@ static void function_drop( struct usb_function_instance *fi = to_usb_function_instance(item); struct gadget_info *gi; + trace_usb_configfs_drop_group(&group->cg_item, item); + gi = container_of(group, struct gadget_info, functions_group); mutex_lock(&gi->lock); @@ -729,6 +733,7 @@ static struct config_group *config_desc_make( if (ret) goto err; + trace_usb_configfs_make_group(&group->cg_item, &cfg->group.cg_item); return &cfg->group; err: kfree(cfg->c.label); @@ -740,6 +745,7 @@ static void config_desc_drop( struct config_group *group, struct config_item *item) { + trace_usb_configfs_drop_group(&group->cg_item, item); config_item_put(item); } @@ -1083,6 +1089,7 @@ static struct config_item *ext_prop_make( ext_prop_type->ct_owner = desc->owner; config_item_init_type_name(&ext_prop->item, name, ext_prop_type); + trace_usb_configfs_make_group(&group->cg_item, &ext_prop->item); ext_prop->name = kstrdup(name, GFP_KERNEL); if (!ext_prop->name) { @@ -1107,6 +1114,8 @@ static void ext_prop_drop(struct config_group *group, struct config_item *item) struct usb_os_desc_ext_prop *ext_prop = to_usb_os_desc_ext_prop(item); struct usb_os_desc *desc = to_usb_os_desc(&group->cg_item); + trace_usb_configfs_drop_group(&group->cg_item, item); + if (desc->opts_mutex) mutex_lock(desc->opts_mutex); list_del(&ext_prop->entry); @@ -1626,6 +1635,7 @@ static struct config_group *gadgets_make( if (!gi->composite.gadget_driver.function) goto err; + trace_usb_configfs_make_group(&group->cg_item, &gi->group.cg_item); return &gi->group; err: kfree(gi); @@ -1634,6 +1644,7 @@ static struct config_group *gadgets_make( static void gadgets_drop(struct config_group *group, struct config_item *item) { + trace_usb_configfs_drop_group(&group->cg_item, item); config_item_put(item); } diff --git a/drivers/usb/gadget/function/f_mass_storage.c b/drivers/usb/gadget/function/f_mass_storage.c index 3a77bca..a96eca9 100644 --- a/drivers/usb/gadget/function/f_mass_storage.c +++ b/drivers/usb/gadget/function/f_mass_storage.c @@ -3289,6 +3289,8 @@ static struct config_group *fsg_lun_make(struct config_group *group, config_group_init_type_name(&opts->group, name, &fsg_lun_type); + trace_usb_configfs_make_group(&group->cg_item, &opts->group.cg_item); + return &opts->group; out: mutex_unlock(&fsg_opts->lock); @@ -3300,6 +3302,8 @@ static void fsg_lun_drop(struct config_group *group, struct config_item *item) struct fsg_lun_opts *lun_opts; struct fsg_opts *fsg_opts; + trace_usb_configfs_drop_group(&group->cg_item, item); + lun_opts = to_fsg_lun_opts(item); fsg_opts = to_fsg_opts(&group->cg_item); diff --git a/drivers/usb/gadget/function/uvc_configfs.c b/drivers/usb/gadget/function/uvc_configfs.c index 77d6403..cc0f2eb 100644 --- a/drivers/usb/gadget/function/uvc_configfs.c +++ b/drivers/usb/gadget/function/uvc_configfs.c @@ -236,6 +236,8 @@ static struct config_item *uvcg_control_header_make(struct config_group *group, config_item_init_type_name(&h->item, name, &uvcg_control_header_type); + trace_usb_configfs_make_group(&group->cg_item, &h->item); + return &h->item; } @@ -1039,6 +1041,8 @@ static struct config_item config_item_init_type_name(&h->item, name, &uvcg_streaming_header_type); + trace_usb_configfs_make_group(&group->cg_item, &h->item); + return &h->item; } @@ -1380,6 +1384,8 @@ static struct config_item *uvcg_frame_make(struct config_group *group, config_item_init_type_name(&h->item, name, &uvcg_frame_type); + trace_usb_configfs_make_group(&group->cg_item, &h->item); + return &h->item; } @@ -1389,6 +1395,8 @@ static void uvcg_frame_drop(struct config_group *group, struct config_item *item struct f_uvc_opts *opts; struct config_item *opts_item; + trace_usb_configfs_drop_group(&group->cg_item, item); + opts_item = group->cg_item.ci_parent->ci_parent->ci_parent; opts = to_f_uvc_opts(opts_item); @@ -1649,6 +1657,8 @@ static struct config_group *uvcg_uncompressed_make(struct config_group *group, config_group_init_type_name(&h->fmt.group, name, &uvcg_uncompressed_type); + trace_usb_configfs_make_group(&group->cg_item, &h->fmt.group.cg_item); + return &h->fmt.group; } @@ -1835,6 +1845,8 @@ static struct config_group *uvcg_mjpeg_make(struct config_group *group, config_group_init_type_name(&h->fmt.group, name, &uvcg_mjpeg_type); + trace_usb_configfs_make_group(&group->cg_item, &h->fmt.group.cg_item); + return &h->fmt.group; } diff --git a/drivers/usb/gadget/trace.c b/drivers/usb/gadget/trace.c index 8b4b1db..8f8b6b7 100644 --- a/drivers/usb/gadget/trace.c +++ b/drivers/usb/gadget/trace.c @@ -6,3 +6,86 @@ #define CREATE_TRACE_POINTS #include "trace.h" +#include +#include + +extern const struct config_item_type gadgets_type; + +#ifdef CONFIG_TRACEPOINTS +#define GROUP_LEN 128 +static int gadget_configfs_group(char *group, struct config_item *item) +{ + struct config_item *parent; + char *tmpgroup; + + if (!item) + return -EINVAL; + + tmpgroup = kzalloc(GROUP_LEN, GFP_KERNEL); + if (!tmpgroup) + return -ENOMEM; + + for (parent = item->ci_parent; parent; + item = parent,parent = item->ci_parent) { + if (item->ci_type == &gadgets_type) { + kfree(tmpgroup); + return 0; + } + + if (tmpgroup[0] == '\0') + snprintf(group, GROUP_LEN, "%s", + config_item_name(item)); + else + snprintf(group, GROUP_LEN, "%s/%s", + config_item_name(item), tmpgroup); + + strcpy(tmpgroup, group); + } + + kfree(tmpgroup); + return -EINVAL; +} + +static void trace_usb_configfs_make_drop_group(struct config_item *parent, + struct config_item *item, char *make_drop) +{ + char *group, *parent_group; + int ret; + + group = kzalloc(2 * GROUP_LEN, GFP_KERNEL); + if (!group) + return; + + parent_group = group + GROUP_LEN; + ret = gadget_configfs_group(parent_group, parent); + if (ret) { + kfree(group); + return; + } + + if (parent_group[0] == '\0') + snprintf(group, GROUP_LEN, "%s %s", make_drop, + config_item_name(item)); + else + snprintf(group, GROUP_LEN, "%s %s/%s", make_drop, parent_group, + config_item_name(item)); + + trace_gadget_configfs(group); + + kfree(group); +} + +void trace_usb_configfs_make_group(struct config_item *parent, + struct config_item *item) +{ + trace_usb_configfs_make_drop_group(parent, item, "mkdir"); +} +EXPORT_SYMBOL(trace_usb_configfs_make_group); + +void trace_usb_configfs_drop_group(struct config_item *parent, + struct config_item *item) +{ + trace_usb_configfs_make_drop_group(parent, item, "rmdir"); +} +EXPORT_SYMBOL(trace_usb_configfs_drop_group); +#endif diff --git a/include/linux/usb/composite.h b/include/linux/usb/composite.h index 9d27622..e904527 100644 --- a/include/linux/usb/composite.h +++ b/include/linux/usb/composite.h @@ -603,6 +603,15 @@ void usb_put_function_instance(struct usb_function_instance *fi); void usb_put_function(struct usb_function *f); struct usb_function_instance *usb_get_function_instance(const char *name); struct usb_function *usb_get_function(struct usb_function_instance *fi); +#ifdef CONFIG_TRACEPOINTS +void trace_usb_configfs_make_group(struct config_item *parent, + struct config_item *item); +void trace_usb_configfs_drop_group(struct config_item *parent, + struct config_item *item); +#else +#define trace_usb_configfs_make_group(parent, item) do {} while(0) +#define trace_usb_configfs_drop_group(parent, item) do {} while(0) +#endif struct usb_configuration *usb_get_config(struct usb_composite_dev *cdev, int val); diff --git a/include/linux/usb/gadget_configfs.h b/include/linux/usb/gadget_configfs.h index d61aebd..a89f177 100644 --- a/include/linux/usb/gadget_configfs.h +++ b/include/linux/usb/gadget_configfs.h @@ -63,6 +63,7 @@ static struct config_item_type struct_in##_langid_type = { \ goto err; \ config_group_init_type_name(&new->group, name, \ &struct_in##_langid_type); \ + trace_usb_configfs_make_group(&group->cg_item, &new->group.cg_item); \ \ gi = container_of(group, struct struct_member, strings_group); \ ret = -EEXIST; \ @@ -86,6 +87,7 @@ static void struct_in##_strings_drop( \ struct config_group *group, \ struct config_item *item) \ { \ + trace_usb_configfs_drop_group(&group->cg_item, item); \ config_item_put(item); \ } \ \