@@ -426,6 +426,20 @@ static ssize_t sysdata_cpu_nr_enabled_show(struct config_item *item, char *buf)
return sysfs_emit(buf, "%d\n", cpu_nr_enabled);
}
+/* configfs helper to display if taskname sysdata feature is enabled */
+static ssize_t sysdata_taskname_enabled_show(struct config_item *item,
+ char *buf)
+{
+ struct netconsole_target *nt = to_target(item->ci_parent);
+ bool taskname_enabled;
+
+ mutex_lock(&dynamic_netconsole_mutex);
+ taskname_enabled = !!(nt->sysdata_fields & SYSDATA_TASKNAME);
+ mutex_unlock(&dynamic_netconsole_mutex);
+
+ return sysfs_emit(buf, "%d\n", taskname_enabled);
+}
+
/*
* This one is special -- targets created through the configfs interface
* are not enabled (and the corresponding netpoll activated) by default.
@@ -841,6 +855,40 @@ static void disable_sysdata_feature(struct netconsole_target *nt,
nt->extradata_complete[nt->userdata_length] = 0;
}
+static ssize_t sysdata_taskname_enabled_store(struct config_item *item,
+ const char *buf, size_t count)
+{
+ struct netconsole_target *nt = to_target(item->ci_parent);
+ bool taskname_enabled, curr;
+ ssize_t ret;
+
+ ret = kstrtobool(buf, &taskname_enabled);
+ if (ret)
+ return ret;
+
+ mutex_lock(&dynamic_netconsole_mutex);
+ curr = nt->sysdata_fields & SYSDATA_TASKNAME;
+ if (taskname_enabled == curr)
+ goto unlock_ok;
+
+ if (taskname_enabled &&
+ count_extradata_entries(nt) >= MAX_EXTRADATA_ITEMS) {
+ ret = -ENOSPC;
+ goto unlock;
+ }
+
+ if (taskname_enabled)
+ nt->sysdata_fields |= SYSDATA_TASKNAME;
+ else
+ disable_sysdata_feature(nt, SYSDATA_TASKNAME);
+
+unlock_ok:
+ ret = strnlen(buf, count);
+unlock:
+ mutex_unlock(&dynamic_netconsole_mutex);
+ return ret;
+}
+
/* configfs helper to sysdata cpu_nr feature */
static ssize_t sysdata_cpu_nr_enabled_store(struct config_item *item,
const char *buf, size_t count)
@@ -886,6 +934,7 @@ static ssize_t sysdata_cpu_nr_enabled_store(struct config_item *item,
CONFIGFS_ATTR(userdatum_, value);
CONFIGFS_ATTR(sysdata_, cpu_nr_enabled);
+CONFIGFS_ATTR(sysdata_, taskname_enabled);
static struct configfs_attribute *userdatum_attrs[] = {
&userdatum_attr_value,
@@ -946,6 +995,7 @@ static void userdatum_drop(struct config_group *group, struct config_item *item)
static struct configfs_attribute *userdata_attrs[] = {
&sysdata_attr_cpu_nr_enabled,
+ &sysdata_attr_taskname_enabled,
NULL,
};
Add configfs interface to enable/disable the taskname sysdata feature. This adds the following functionality: The implementation follows the same pattern as the existing CPU number feature, ensuring consistent behavior and error handling across sysdata features. Signed-off-by: Breno Leitao <leitao@debian.org> --- drivers/net/netconsole.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+)