4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2013, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
38 * Lustre Metadata Server (MDS) filesystem interface code
41 #define DEBUG_SUBSYSTEM S_MDS
43 #include "mdt_internal.h"
45 static const struct file_operations mdt_open_files_seq_fops = {
47 .open = lprocfs_mdt_open_files_seq_open,
50 .release = seq_release,
54 * Initialize MDT per-export statistics.
56 * This function sets up procfs entries for various MDT export counters. These
57 * counters are for per-client statistics tracked on the server.
59 * \param[in] obd OBD device
60 * \param[in] exp OBD export
61 * \param[in] localdata NID of client
63 * \retval 0 if successful
64 * \retval negative value on error
66 int mdt_export_stats_init(struct obd_device *obd, struct obd_export *exp,
69 lnet_nid_t *client_nid = localdata;
70 struct nid_stat *stats;
74 LASSERT(!obd->obd_uses_nid_stats);
76 rc = lprocfs_exp_setup(exp, client_nid);
78 /* Mask error for already created /proc entries */
79 RETURN(rc == -EALREADY ? 0 : rc);
81 stats = exp->exp_nid_stats;
82 stats->nid_stats = lprocfs_alloc_stats(LPROC_MDT_LAST,
83 LPROCFS_STATS_FLAG_NOPERCPU);
84 if (stats->nid_stats == NULL)
87 mdt_stats_counter_init(stats->nid_stats);
89 rc = lprocfs_register_stats(stats->nid_proc, "stats", stats->nid_stats);
91 lprocfs_free_stats(&stats->nid_stats);
95 rc = lprocfs_nid_ldlm_stats_init(stats);
99 rc = lprocfs_seq_create(stats->nid_proc, "open_files",
100 0444, &mdt_open_files_seq_fops, stats);
102 CWARN("%s: error adding the open_files file: rc = %d\n",