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Message-ID: <20240228165709.82089-2-jose.souza@intel.com>
Date: Wed, 28 Feb 2024 08:57:07 -0800
From: José Roberto de Souza <jose.souza@...el.com>
To: linux-kernel@...r.kernel.org,
intel-xe@...ts.freedesktop.org
Cc: Rodrigo Vivi <rodrigo.vivi@...el.com>,
Mukesh Ojha <quic_mojha@...cinc.com>,
Johannes Berg <johannes@...solutions.net>,
Jonathan Cavitt <jonathan.cavitt@...el.com>,
José Roberto de Souza <jose.souza@...el.com>
Subject: [PATCH v2 2/4] devcoredump: Add dev_coredumpm_timeout()
Add function to set a custom coredump timeout.
Current 5-minute timeout may be too short for users to search and
understand what needs to be done to capture coredump to report bugs.
v2:
- replace dev_coredump_timeout_set() by dev_coredumpm_timeout() (Mukesh)
Cc: Rodrigo Vivi <rodrigo.vivi@...el.com>
Cc: Mukesh Ojha <quic_mojha@...cinc.com>
Cc: Johannes Berg <johannes@...solutions.net>
Cc: Jonathan Cavitt <jonathan.cavitt@...el.com>
Signed-off-by: José Roberto de Souza <jose.souza@...el.com>
---
drivers/base/devcoredump.c | 44 +++++++++++++++++++++++++++++++------
include/linux/devcoredump.h | 18 +++++++++++++++
2 files changed, 55 insertions(+), 7 deletions(-)
diff --git a/drivers/base/devcoredump.c b/drivers/base/devcoredump.c
index 82aeb09b3d1b5..07b89f7f735d8 100644
--- a/drivers/base/devcoredump.c
+++ b/drivers/base/devcoredump.c
@@ -328,7 +328,8 @@ void dev_coredump_put(struct device *dev)
EXPORT_SYMBOL_GPL(dev_coredump_put);
/**
- * dev_coredumpm - create device coredump with read/free methods
+ * dev_coredumpm_timeout - create device coredump with read/free methods with a
+ * custom timeout.
* @dev: the struct device for the crashed device
* @owner: the module that contains the read/free functions, use %THIS_MODULE
* @data: data cookie for the @read/@...e functions
@@ -336,17 +337,20 @@ EXPORT_SYMBOL_GPL(dev_coredump_put);
* @gfp: allocation flags
* @read: function to read from the given buffer
* @free: function to free the given buffer
+ * @timeout: time in jiffies to remove coredump
*
* Creates a new device coredump for the given device. If a previous one hasn't
* been read yet, the new coredump is discarded. The data lifetime is determined
* by the device coredump framework and when it is no longer needed the @free
* function will be called to free the data.
*/
-void dev_coredumpm(struct device *dev, struct module *owner,
- void *data, size_t datalen, gfp_t gfp,
- ssize_t (*read)(char *buffer, loff_t offset, size_t count,
- void *data, size_t datalen),
- void (*free)(void *data))
+void dev_coredumpm_timeout(struct device *dev, struct module *owner,
+ void *data, size_t datalen, gfp_t gfp,
+ ssize_t (*read)(char *buffer, loff_t offset,
+ size_t count, void *data,
+ size_t datalen),
+ void (*free)(void *data),
+ unsigned long timeout)
{
static atomic_t devcd_count = ATOMIC_INIT(0);
struct devcd_entry *devcd;
@@ -403,7 +407,7 @@ void dev_coredumpm(struct device *dev, struct module *owner,
dev_set_uevent_suppress(&devcd->devcd_dev, false);
kobject_uevent(&devcd->devcd_dev.kobj, KOBJ_ADD);
INIT_DELAYED_WORK(&devcd->del_wk, devcd_del);
- schedule_delayed_work(&devcd->del_wk, DEVCD_TIMEOUT);
+ schedule_delayed_work(&devcd->del_wk, timeout);
mutex_unlock(&devcd->mutex);
return;
put_device:
@@ -414,6 +418,32 @@ void dev_coredumpm(struct device *dev, struct module *owner,
free:
free(data);
}
+EXPORT_SYMBOL_GPL(dev_coredumpm_timeout);
+
+/**
+ * dev_coredumpm - create device coredump with read/free methods
+ * @dev: the struct device for the crashed device
+ * @owner: the module that contains the read/free functions, use %THIS_MODULE
+ * @data: data cookie for the @read/@...e functions
+ * @datalen: length of the data
+ * @gfp: allocation flags
+ * @read: function to read from the given buffer
+ * @free: function to free the given buffer
+ *
+ * Creates a new device coredump for the given device. If a previous one hasn't
+ * been read yet, the new coredump is discarded. The data lifetime is determined
+ * by the device coredump framework and when it is no longer needed the @free
+ * function will be called to free the data.
+ */
+void dev_coredumpm(struct device *dev, struct module *owner,
+ void *data, size_t datalen, gfp_t gfp,
+ ssize_t (*read)(char *buffer, loff_t offset, size_t count,
+ void *data, size_t datalen),
+ void (*free)(void *data))
+{
+ dev_coredumpm_timeout(dev, owner, data, datalen, gfp, read, free,
+ DEVCD_TIMEOUT);
+}
EXPORT_SYMBOL_GPL(dev_coredumpm);
/**
diff --git a/include/linux/devcoredump.h b/include/linux/devcoredump.h
index c8f7eb6cc1915..5e1e4deab07a6 100644
--- a/include/linux/devcoredump.h
+++ b/include/linux/devcoredump.h
@@ -55,6 +55,14 @@ static inline void _devcd_free_sgtable(struct scatterlist *table)
void dev_coredumpv(struct device *dev, void *data, size_t datalen,
gfp_t gfp);
+void dev_coredumpm_timeout(struct device *dev, struct module *owner,
+ void *data, size_t datalen, gfp_t gfp,
+ ssize_t (*read)(char *buffer, loff_t offset,
+ size_t count, void *data,
+ size_t datalen),
+ void (*free)(void *data),
+ unsigned long timeout);
+
void dev_coredumpm(struct device *dev, struct module *owner,
void *data, size_t datalen, gfp_t gfp,
ssize_t (*read)(char *buffer, loff_t offset, size_t count,
@@ -72,6 +80,16 @@ static inline void dev_coredumpv(struct device *dev, void *data,
vfree(data);
}
+void dev_coredumpm_timeout(struct device *dev, struct module *owner,
+ void *data, size_t datalen, gfp_t gfp,
+ ssize_t (*read)(char *buffer, loff_t offset,
+ size_t count, void *data,
+ size_t datalen),
+ void (*free)(void *data),
+ unsigned long timeout)
+{
+}
+
static inline void
dev_coredumpm(struct device *dev, struct module *owner,
void *data, size_t datalen, gfp_t gfp,
--
2.44.0
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