*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; If not, see
- * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
+ * http://www.gnu.org/licenses/gpl-2.0.html
*
* GPL HEADER END
*/
* Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
- * Copyright (c) 2011, Intel Corporation.
+ * Copyright (c) 2011, 2015, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
#include "mdt_internal.h"
-int mdt_export_stats_init(struct obd_device *obd,
- struct obd_export *exp,
- void *localdata)
-{
- lnet_nid_t *client_nid = localdata;
- int rc, newnid;
- ENTRY;
+static const struct file_operations mdt_open_files_seq_fops = {
+ .owner = THIS_MODULE,
+ .open = lprocfs_mdt_open_files_seq_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
- LASSERT(!obd->obd_uses_nid_stats);
+/**
+ * Initialize MDT per-export statistics.
+ *
+ * This function sets up procfs entries for various MDT export counters. These
+ * counters are for per-client statistics tracked on the server.
+ *
+ * \param[in] obd OBD device
+ * \param[in] exp OBD export
+ * \param[in] localdata NID of client
+ *
+ * \retval 0 if successful
+ * \retval negative value on error
+ */
+int mdt_export_stats_init(struct obd_device *obd, struct obd_export *exp,
+ void *localdata)
+{
+ lnet_nid_t *client_nid = localdata;
+ struct nid_stat *stats;
+ int rc;
+ ENTRY;
- rc = lprocfs_exp_setup(exp, client_nid, &newnid);
- if (rc) {
- /* Mask error for already created
- * /proc entries */
- if (rc == -EALREADY)
- rc = 0;
- RETURN(rc);
- }
- if (newnid) {
- struct nid_stat *tmp = exp->exp_nid_stats;
+ rc = lprocfs_exp_setup(exp, client_nid);
+ if (rc != 0)
+ /* Mask error for already created /proc entries */
+ RETURN(rc == -EALREADY ? 0 : rc);
- tmp->nid_stats = lprocfs_alloc_stats(LPROC_MDT_LAST,
+ stats = exp->exp_nid_stats;
+ stats->nid_stats = lprocfs_alloc_stats(LPROC_MDT_LAST,
LPROCFS_STATS_FLAG_NOPERCPU);
- if (tmp->nid_stats == NULL)
- RETURN(-ENOMEM);
- mdt_stats_counter_init(tmp->nid_stats);
- rc = lprocfs_register_stats(tmp->nid_proc, "stats",
- tmp->nid_stats);
- if (rc)
- GOTO(clean, rc);
- rc = lprocfs_nid_ldlm_stats_init(tmp);
- if (rc)
- GOTO(clean, rc);
- }
- RETURN(0);
- clean:
- return rc;
+ if (stats->nid_stats == NULL)
+ RETURN(-ENOMEM);
+
+ mdt_stats_counter_init(stats->nid_stats);
+
+ rc = lprocfs_register_stats(stats->nid_proc, "stats", stats->nid_stats);
+ if (rc != 0) {
+ lprocfs_free_stats(&stats->nid_stats);
+ GOTO(out, rc);
+ }
+
+ rc = lprocfs_nid_ldlm_stats_init(stats);
+ if (rc != 0)
+ GOTO(out, rc);
+
+ rc = lprocfs_seq_create(stats->nid_proc, "open_files",
+ 0444, &mdt_open_files_seq_fops, stats);
+ if (rc != 0) {
+ CWARN("%s: error adding the open_files file: rc = %d\n",
+ obd->obd_name, rc);
+ GOTO(out, rc);
+ }
+out:
+ RETURN(rc);
}