LU-12330 obdclass: allow per-session jobids.

[fs/lustre-release.git] / lustre / obdclass / obd_sysfs.c

diff --git a/lustre/obdclass/obd_sysfs.c b/lustre/obdclass/obd_sysfs.c
index f83c6f3..7e1b277 100644 (file)
--- a/lustre/obdclass/obd_sysfs.c
+++ b/lustre/obdclass/obd_sysfs.c
@@ -311,6 +311,44 @@ static ssize_t jobid_name_store(struct kobject *kobj, struct attribute *attr,
        return count;
 }
 
+static ssize_t jobid_this_session_show(struct kobject *kobj,
+                                      struct attribute *attr,
+                                      char *buf)
+{
+       char *jid;
+       int ret = -ENOENT;
+
+       rcu_read_lock();
+       jid = jobid_current();
+       if (jid)
+               ret = snprintf(buf, PAGE_SIZE, "%s\n", jid);
+       rcu_read_unlock();
+       return ret;
+}
+
+static ssize_t jobid_this_session_store(struct kobject *kobj,
+                                       struct attribute *attr,
+                                       const char *buffer,
+                                       size_t count)
+{
+       char *jobid;
+       int len;
+       int ret;
+
+       if (!count || count > LUSTRE_JOBID_SIZE)
+               return -EINVAL;
+
+       jobid = kstrndup(buffer, count, GFP_KERNEL);
+       if (!jobid)
+               return -ENOMEM;
+       len = strcspn(jobid, "\n ");
+       jobid[len] = '\0';
+       ret = jobid_set_current(jobid);
+       kfree(jobid);
+
+       return ret ?: count;
+}
+
 /* Root for /sys/kernel/debug/lustre */
 struct dentry *debugfs_lustre_root;
 EXPORT_SYMBOL_GPL(debugfs_lustre_root);
@@ -328,6 +366,7 @@ LUSTRE_RO_ATTR(pinger);
 LUSTRE_RO_ATTR(health_check);
 LUSTRE_RW_ATTR(jobid_var);
 LUSTRE_RW_ATTR(jobid_name);
+LUSTRE_RW_ATTR(jobid_this_session);
 
 static struct attribute *lustre_attrs[] = {
        &lustre_attr_version.attr,
@@ -335,6 +374,7 @@ static struct attribute *lustre_attrs[] = {
        &lustre_attr_health_check.attr,
        &lustre_attr_jobid_name.attr,
        &lustre_attr_jobid_var.attr,
+       &lustre_attr_jobid_this_session.attr,
        &lustre_sattr_timeout.u.attr,
        &lustre_attr_max_dirty_mb.attr,
        &lustre_sattr_debug_peer_on_timeout.u.attr,