@@ -2281,6 +2281,30 @@ int dev_set_name(struct device *dev, const char *fmt, ...)
}
EXPORT_SYMBOL_GPL(dev_set_name);
+/**
+ * dev_durable_name - Write "DURABLE_NAME"=<durable name> in buffer
+ * @dev: device
+ * @buffer: character buffer to write results
+ * @len: length of buffer
+ * @return: Number of bytes written to buffer
+ */
+int dev_durable_name(const struct device *dev, char *buffer, size_t len)
+{
+ int tmp, dlen;
+
+ if (dev && dev->durable_name) {
+ tmp = snprintf(buffer, len, "DURABLE_NAME=");
+ if (tmp < len) {
+ dlen = dev->durable_name(dev, buffer + tmp,
+ len - tmp);
+ if (dlen > 0 && ((dlen + tmp) < len))
+ return dlen + tmp;
+ }
+ }
+ return 0;
+}
+EXPORT_SYMBOL_GPL(dev_durable_name);
+
/**
* device_to_dev_kobj - select a /sys/dev/ directory for the device
* @dev: device
@@ -616,6 +616,8 @@ struct device {
struct iommu_fwspec *iommu_fwspec;
struct iommu_param *iommu_param;
+ int (*durable_name)(const struct device *dev, char *buff, size_t len);
+
bool offline_disabled:1;
bool offline:1;
bool of_node_reused:1;
@@ -657,6 +659,8 @@ static inline const char *dev_name(const struct device *dev)
extern __printf(2, 3)
int dev_set_name(struct device *dev, const char *name, ...);
+int dev_durable_name(const struct device *d, char *buffer, size_t len);
+
#ifdef CONFIG_NUMA
static inline int dev_to_node(struct device *dev)
{
Function callback and function to be used to write a persistent durable name to the supplied character buffer. This will be used to add structured key-value data to log messages for hardware related errors which allows end users to correlate message and specific hardware. Signed-off-by: Tony Asleson <tasleson@redhat.com> --- drivers/base/core.c | 24 ++++++++++++++++++++++++ include/linux/device.h | 4 ++++ 2 files changed, 28 insertions(+)