linux-usb.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Andrey Konovalov <andreyknvl@google.com>
To: Dmitry Vyukov <dvyukov@google.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
	linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org,
	Alan Stern <stern@rowland.harvard.edu>,
	Shuah Khan <shuah@kernel.org>,
	Alexander Potapenko <glider@google.com>,
	Marco Elver <elver@google.com>,
	Aleksandr Nogikh <nogikh@google.com>,
	Nazime Hande Harputluoglu <handeharput@gmail.com>,
	Nazime Hande Harputluoglu <handeharputlu@google.com>
Subject: [PATCH v2] kcov, usbip: collect coverage from vhci_rx_loop
Date: Mon, 12 Oct 2020 19:08:35 +0200	[thread overview]
Message-ID: <c07a2deae7a75e394de272c1a33cfcc1f667af92.1602522185.git.andreyknvl@google.com> (raw)

From: Nazime Hande Harputluoglu <handeharputlu@google.com>

Add kcov_remote_start()/kcov_remote_stop() annotations to the
vhci_rx_loop() function, which is responsible for parsing USB/IP packets
coming into USB/IP client.

Since vhci_rx_loop() threads are spawned per vhci_hcd device instance, the
common kcov handle is used for kcov_remote_start()/stop() annotations
(see Documentation/dev-tools/kcov.rst for details). As the result kcov
can now be used to collect coverage from vhci_rx_loop() threads.

Signed-off-by: Nazime Hande Harputluoglu <handeharputlu@google.com>
---

Changes v1->v2:
- Fix spacing issues.
- Add ifdef CONFIG_KCOV around kcov_handle in usbip_device struct.

---
 drivers/usb/usbip/usbip_common.h |  4 ++++
 drivers/usb/usbip/vhci_rx.c      |  3 +++
 drivers/usb/usbip/vhci_sysfs.c   | 12 +++++++-----
 3 files changed, 14 insertions(+), 5 deletions(-)

diff --git a/drivers/usb/usbip/usbip_common.h b/drivers/usb/usbip/usbip_common.h
index 8be857a4fa13..0906182011d6 100644
--- a/drivers/usb/usbip/usbip_common.h
+++ b/drivers/usb/usbip/usbip_common.h
@@ -277,6 +277,10 @@ struct usbip_device {
 		void (*reset)(struct usbip_device *);
 		void (*unusable)(struct usbip_device *);
 	} eh_ops;
+
+#ifdef CONFIG_KCOV
+	u64 kcov_handle;
+#endif
 };
 
 #define kthread_get_run(threadfn, data, namefmt, ...)			   \
diff --git a/drivers/usb/usbip/vhci_rx.c b/drivers/usb/usbip/vhci_rx.c
index 266024cbb64f..473f14587bd5 100644
--- a/drivers/usb/usbip/vhci_rx.c
+++ b/drivers/usb/usbip/vhci_rx.c
@@ -3,6 +3,7 @@
  * Copyright (C) 2003-2008 Takahiro Hirofuchi
  */
 
+#include <linux/kcov.h>
 #include <linux/kthread.h>
 #include <linux/slab.h>
 
@@ -261,7 +262,9 @@ int vhci_rx_loop(void *data)
 		if (usbip_event_happened(ud))
 			break;
 
+		kcov_remote_start_common(ud->kcov_handle);
 		vhci_rx_pdu(ud);
+		kcov_remote_stop();
 	}
 
 	return 0;
diff --git a/drivers/usb/usbip/vhci_sysfs.c b/drivers/usb/usbip/vhci_sysfs.c
index be37aec250c2..966f1f5cafb1 100644
--- a/drivers/usb/usbip/vhci_sysfs.c
+++ b/drivers/usb/usbip/vhci_sysfs.c
@@ -4,6 +4,7 @@
  * Copyright (C) 2015-2016 Nobuo Iwata
  */
 
+#include <linux/kcov.h>
 #include <linux/kthread.h>
 #include <linux/file.h>
 #include <linux/net.h>
@@ -378,11 +379,12 @@ static ssize_t attach_store(struct device *dev, struct device_attribute *attr,
 	dev_info(dev, "devid(%u) speed(%u) speed_str(%s)\n",
 		 devid, speed, usb_speed_string(speed));
 
-	vdev->devid         = devid;
-	vdev->speed         = speed;
-	vdev->ud.sockfd     = sockfd;
-	vdev->ud.tcp_socket = socket;
-	vdev->ud.status     = VDEV_ST_NOTASSIGNED;
+	vdev->devid          = devid;
+	vdev->speed          = speed;
+	vdev->ud.sockfd      = sockfd;
+	vdev->ud.tcp_socket  = socket;
+	vdev->ud.status      = VDEV_ST_NOTASSIGNED;
+	vdev->ud.kcov_handle = kcov_common_handle();
 
 	spin_unlock(&vdev->ud.lock);
 	spin_unlock_irqrestore(&vhci->lock, flags);
-- 
2.28.0.1011.ga647a8990f-goog


WARNING: multiple messages have this Message-ID (diff)
From: Andrey Konovalov <andreyknvl@google.com>
To: Dmitry Vyukov <dvyukov@google.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
	linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org,
	Alan Stern <stern@rowland.harvard.edu>,
	Shuah Khan <shuah@kernel.org>,
	Alexander Potapenko <glider@google.com>,
	Marco Elver <elver@google.com>,
	Aleksandr Nogikh <nogikh@google.com>,
	Nazime Hande Harputluoglu <handeharput@gmail.com>,
	Andrey Konovalov <andreyknvl@google.com>,
	Nazime Hande Harputluoglu <handeharputlu@google.com>
Subject: [PATCH v2] kcov, usbip: collect coverage from vhci_rx_loop
Date: Mon, 12 Oct 2020 19:10:21 +0200	[thread overview]
Message-ID: <c07a2deae7a75e394de272c1a33cfcc1f667af92.1602522185.git.andreyknvl@google.com> (raw)
Message-ID: <20201012171021.epBPN1jHgkT2EPDILdN_yHysvdVhfVhxVajr4o2hQkc@z> (raw)

From: Nazime Hande Harputluoglu <handeharputlu@google.com>

Add kcov_remote_start()/kcov_remote_stop() annotations to the
vhci_rx_loop() function, which is responsible for parsing USB/IP packets
coming into USB/IP client.

Since vhci_rx_loop() threads are spawned per vhci_hcd device instance, the
common kcov handle is used for kcov_remote_start()/stop() annotations
(see Documentation/dev-tools/kcov.rst for details). As the result kcov
can now be used to collect coverage from vhci_rx_loop() threads.

Signed-off-by: Nazime Hande Harputluoglu <handeharputlu@google.com>
---

Changes v1->v2:
- Fix spacing issues.
- Add ifdef CONFIG_KCOV around kcov_handle in usbip_device struct.

---
 drivers/usb/usbip/usbip_common.h |  4 ++++
 drivers/usb/usbip/vhci_rx.c      |  3 +++
 drivers/usb/usbip/vhci_sysfs.c   | 12 +++++++-----
 3 files changed, 14 insertions(+), 5 deletions(-)

diff --git a/drivers/usb/usbip/usbip_common.h b/drivers/usb/usbip/usbip_common.h
index 8be857a4fa13..0906182011d6 100644
--- a/drivers/usb/usbip/usbip_common.h
+++ b/drivers/usb/usbip/usbip_common.h
@@ -277,6 +277,10 @@ struct usbip_device {
 		void (*reset)(struct usbip_device *);
 		void (*unusable)(struct usbip_device *);
 	} eh_ops;
+
+#ifdef CONFIG_KCOV
+	u64 kcov_handle;
+#endif
 };
 
 #define kthread_get_run(threadfn, data, namefmt, ...)			   \
diff --git a/drivers/usb/usbip/vhci_rx.c b/drivers/usb/usbip/vhci_rx.c
index 266024cbb64f..473f14587bd5 100644
--- a/drivers/usb/usbip/vhci_rx.c
+++ b/drivers/usb/usbip/vhci_rx.c
@@ -3,6 +3,7 @@
  * Copyright (C) 2003-2008 Takahiro Hirofuchi
  */
 
+#include <linux/kcov.h>
 #include <linux/kthread.h>
 #include <linux/slab.h>
 
@@ -261,7 +262,9 @@ int vhci_rx_loop(void *data)
 		if (usbip_event_happened(ud))
 			break;
 
+		kcov_remote_start_common(ud->kcov_handle);
 		vhci_rx_pdu(ud);
+		kcov_remote_stop();
 	}
 
 	return 0;
diff --git a/drivers/usb/usbip/vhci_sysfs.c b/drivers/usb/usbip/vhci_sysfs.c
index be37aec250c2..966f1f5cafb1 100644
--- a/drivers/usb/usbip/vhci_sysfs.c
+++ b/drivers/usb/usbip/vhci_sysfs.c
@@ -4,6 +4,7 @@
  * Copyright (C) 2015-2016 Nobuo Iwata
  */
 
+#include <linux/kcov.h>
 #include <linux/kthread.h>
 #include <linux/file.h>
 #include <linux/net.h>
@@ -378,11 +379,12 @@ static ssize_t attach_store(struct device *dev, struct device_attribute *attr,
 	dev_info(dev, "devid(%u) speed(%u) speed_str(%s)\n",
 		 devid, speed, usb_speed_string(speed));
 
-	vdev->devid         = devid;
-	vdev->speed         = speed;
-	vdev->ud.sockfd     = sockfd;
-	vdev->ud.tcp_socket = socket;
-	vdev->ud.status     = VDEV_ST_NOTASSIGNED;
+	vdev->devid          = devid;
+	vdev->speed          = speed;
+	vdev->ud.sockfd      = sockfd;
+	vdev->ud.tcp_socket  = socket;
+	vdev->ud.status      = VDEV_ST_NOTASSIGNED;
+	vdev->ud.kcov_handle = kcov_common_handle();
 
 	spin_unlock(&vdev->ud.lock);
 	spin_unlock_irqrestore(&vhci->lock, flags);
-- 
2.28.0.1011.ga647a8990f-goog


             reply	other threads:[~2020-10-12 17:09 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-12 17:08 Andrey Konovalov [this message]
2020-10-12 17:10 ` [PATCH v2] kcov, usbip: collect coverage from vhci_rx_loop Andrey Konovalov
2020-10-13 17:28 ` Shuah Khan
2020-10-14 15:54   ` Andrey Konovalov
2020-10-16 14:18   ` Andrey Konovalov
2020-10-16 17:03     ` Shuah Khan

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=c07a2deae7a75e394de272c1a33cfcc1f667af92.1602522185.git.andreyknvl@google.com \
    --to=andreyknvl@google.com \
    --cc=akpm@linux-foundation.org \
    --cc=dvyukov@google.com \
    --cc=elver@google.com \
    --cc=glider@google.com \
    --cc=gregkh@linuxfoundation.org \
    --cc=handeharput@gmail.com \
    --cc=handeharputlu@google.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-usb@vger.kernel.org \
    --cc=nogikh@google.com \
    --cc=shuah@kernel.org \
    --cc=stern@rowland.harvard.edu \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).