From: Tony Asleson <tasleson@redhat.com>
To: linux-scsi@vger.kernel.org, linux-block@vger.kernel.org,
linux-ide@vger.kernel.org
Subject: [v5 01/12] struct device: Add function callback durable_name
Date: Fri, 25 Sep 2020 11:19:18 -0500 [thread overview]
Message-ID: <20200925161929.1136806-2-tasleson@redhat.com> (raw)
In-Reply-To: <20200925161929.1136806-1-tasleson@redhat.com>
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(+)
diff --git a/drivers/base/core.c b/drivers/base/core.c
index 05d414e9e8a4..88696ade8bfc 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -2489,6 +2489,30 @@ 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
diff --git a/include/linux/device.h b/include/linux/device.h
index 5efed864b387..074125999dd8 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -614,6 +614,8 @@ struct device {
struct iommu_group *iommu_group;
struct dev_iommu *iommu;
+ int (*durable_name)(const struct device *dev, char *buff, size_t len);
+
bool offline_disabled:1;
bool offline:1;
bool of_node_reused:1;
@@ -655,6 +657,8 @@ 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)
{
--
2.26.2
next prev parent reply other threads:[~2020-09-25 16:19 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-25 16:19 [v5 00/12] Add persistent durable identifier to storage log messages Tony Asleson
2020-09-25 16:19 ` Tony Asleson [this message]
2020-09-26 9:08 ` [v5 01/12] struct device: Add function callback durable_name Sergei Shtylyov
2020-09-27 14:22 ` Tony Asleson
2020-09-27 16:15 ` Sergei Shtylyov
2020-09-29 17:51 ` Christoph Hellwig
2020-09-29 18:04 ` Greg Kroah-Hartman
2020-09-29 22:04 ` Tony Asleson
2020-09-30 7:38 ` Greg Kroah-Hartman
2020-09-30 7:40 ` Greg Kroah-Hartman
2020-09-30 14:35 ` Tony Asleson
2020-10-01 11:48 ` Greg Kroah-Hartman
2020-10-07 20:10 ` Tony Asleson
2020-10-08 4:48 ` Greg Kroah-Hartman
2020-10-08 20:49 ` Martin K. Petersen
2020-10-08 5:54 ` Hannes Reinecke
2020-10-08 6:22 ` Finn Thain
2020-09-25 16:19 ` [v5 02/12] create_syslog_header: Add durable name Tony Asleson
2020-09-25 16:19 ` [v5 03/12] dev_vprintk_emit: Increase hdr size Tony Asleson
2020-09-25 16:19 ` [v5 04/12] scsi: Add durable_name for dev_printk Tony Asleson
2020-09-25 16:19 ` [v5 05/12] nvme: Add durable name " Tony Asleson
2020-09-25 16:19 ` [v5 06/12] libata: Add ata_scsi_durable_name Tony Asleson
2020-09-25 16:19 ` [v5 07/12] libata: Make ata_scsi_durable_name static Tony Asleson
2020-09-26 8:40 ` Sergei Shtylyov
2020-09-26 14:17 ` Tony Asleson
2020-09-26 15:57 ` James Bottomley
2020-09-28 20:35 ` Tony Asleson
2020-09-25 16:19 ` [v5 08/12] Add durable_name_printk Tony Asleson
2020-09-26 23:53 ` Randy Dunlap
2020-09-28 15:52 ` Tony Asleson
2020-09-28 17:32 ` Randy Dunlap
2020-09-25 16:19 ` [v5 09/12] libata: use durable_name_printk Tony Asleson
2020-09-25 16:19 ` [v5 10/12] Add durable_name_printk_ratelimited Tony Asleson
2020-09-25 16:19 ` [v5 11/12] print_req_error: Use durable_name_printk_ratelimited Tony Asleson
2020-09-25 16:19 ` [v5 12/12] buffer_io_error: " Tony Asleson
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