The administrator reads the user_count file corresponding the ipmi device, ipmi
traverse all intf, and count the number of user.
Signed-off-by: Chen Guanqiao <chen.chencha...@foxmail.com>
---
drivers/char/ipmi/ipmi_msghandler.c | 33 +++++++++++++++++++++++++++++
1 file changed, 33 insertions(+)
diff --git a/drivers/char/ipmi/ipmi_msghandler.c
b/drivers/char/ipmi/ipmi_msghandler.c
index c59265146e9c..e14beb51cae4 100644
--- a/drivers/char/ipmi/ipmi_msghandler.c
+++ b/drivers/char/ipmi/ipmi_msghandler.c
@@ -2706,6 +2706,29 @@ static int bmc_get_device_id(struct ipmi_smi *intf,
struct bmc_device *bmc,
return __bmc_get_device_id(intf, bmc, id, guid_set, guid, -1);
}
+static unsigned int get_user_count(void)
+{
+ struct ipmi_smi *intf;
+ int index;
+ unsigned int total_count = 0;
+
+ index = srcu_read_lock(&ipmi_interfaces_srcu);
+ list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
+ struct ipmi_user *user;
+ int intf_index, count = 0;
+
+ intf_index = srcu_read_lock(&intf->users_srcu);
+ list_for_each_entry_rcu(user, &intf->users, link)
+ count++;
+ srcu_read_unlock(&intf->users_srcu, intf_index);
+
+ total_count += count;
+ }
+ srcu_read_unlock(&ipmi_interfaces_srcu, index);
+
+ return total_count;
+}
+
static ssize_t device_id_show(struct device *dev,
struct device_attribute *attr,
char *buf)
@@ -2875,6 +2898,15 @@ static ssize_t guid_show(struct device *dev, struct
device_attribute *attr,
}
static DEVICE_ATTR_RO(guid);
+static ssize_t user_count_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ unsigned int user_count = get_user_count();
+
+ return snprintf(buf, 20, "%u\n", user_count);
+}
+static DEVICE_ATTR_ADMIN_RO(user_count);
+
static struct attribute *bmc_dev_attrs[] = {
&dev_attr_device_id.attr,
&dev_attr_provides_device_sdrs.attr,
@@ -2886,6 +2918,7 @@ static struct attribute *bmc_dev_attrs[] = {
&dev_attr_product_id.attr,
&dev_attr_aux_firmware_revision.attr,
&dev_attr_guid.attr,
+ &dev_attr_user_count.attr,
NULL
};
--
2.25.1
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