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Message-ID: <20250807230648.1112569-4-corey@minyard.net>
Date: Thu, 7 Aug 2025 18:02:34 -0500
From: Corey Minyard <corey@...yard.net>
To: Frederick Lawler <fred@...udflare.com>
Cc: openipmi-developer@...ts.sourceforge.net,
linux-kernel@...r.kernel.org,
kernel-team@...udflare.com,
Corey Minyard <corey@...yard.net>
Subject: [PATCH 3/4] ipmi: Add a maintenance mode sysfs file
So you can see if it's in maintenance mode and see how long is left.
Signed-off-by: Corey Minyard <corey@...yard.net>
---
drivers/char/ipmi/ipmi_msghandler.c | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/drivers/char/ipmi/ipmi_msghandler.c b/drivers/char/ipmi/ipmi_msghandler.c
index 72f5f4a0c056..5ff35c473b50 100644
--- a/drivers/char/ipmi/ipmi_msghandler.c
+++ b/drivers/char/ipmi/ipmi_msghandler.c
@@ -432,6 +432,7 @@ struct ipmi_smi {
atomic_t nr_users;
struct device_attribute nr_users_devattr;
struct device_attribute nr_msgs_devattr;
+ struct device_attribute maintenance_mode_devattr;
/* Used for wake ups at startup. */
@@ -3545,6 +3546,19 @@ static ssize_t nr_msgs_show(struct device *dev,
}
static DEVICE_ATTR_RO(nr_msgs);
+static ssize_t maintenance_mode_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct ipmi_smi *intf = container_of(attr,
+ struct ipmi_smi,
+ maintenance_mode_devattr);
+
+ return sysfs_emit(buf, "%u %d\n", intf->maintenance_mode_state,
+ intf->auto_maintenance_timeout);
+}
+static DEVICE_ATTR_RO(maintenance_mode);
+
static void redo_bmc_reg(struct work_struct *work)
{
struct ipmi_smi *intf = container_of(work, struct ipmi_smi,
@@ -3681,6 +3695,14 @@ int ipmi_add_smi(struct module *owner,
goto out_err_bmc_reg;
}
+ intf->maintenance_mode_devattr = dev_attr_maintenance_mode;
+ sysfs_attr_init(&intf->maintenance_mode_devattr.attr);
+ rv = device_create_file(intf->si_dev, &intf->maintenance_mode_devattr);
+ if (rv) {
+ device_remove_file(intf->si_dev, &intf->nr_users_devattr);
+ goto out_err_bmc_reg;
+ }
+
intf->intf_num = i;
mutex_unlock(&ipmi_interfaces_mutex);
@@ -3788,6 +3810,7 @@ void ipmi_unregister_smi(struct ipmi_smi *intf)
if (intf->handlers->shutdown)
intf->handlers->shutdown(intf->send_info);
+ device_remove_file(intf->si_dev, &intf->maintenance_mode_devattr);
device_remove_file(intf->si_dev, &intf->nr_msgs_devattr);
device_remove_file(intf->si_dev, &intf->nr_users_devattr);
--
2.43.0
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