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.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2011, 2015, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
34 * Lustre Metadata Server (MDS) filesystem interface code
37 #define DEBUG_SUBSYSTEM S_MDS
40 #include <libcfs/linux/linux-fs.h>
41 #include "mdt_internal.h"
43 static const struct proc_ops mdt_open_files_seq_fops = {
44 PROC_OWNER(THIS_MODULE)
45 .proc_open = lprocfs_mdt_open_files_seq_open,
46 .proc_read = seq_read,
47 .proc_lseek = seq_lseek,
48 .proc_release = seq_release,
52 * Initialize MDT per-export statistics.
54 * This function sets up procfs entries for various MDT export counters. These
55 * counters are for per-client statistics tracked on the server.
57 * \param[in] obd OBD device
58 * \param[in] exp OBD export
59 * \param[in] localdata NID of client
61 * \retval 0 if successful
62 * \retval negative value on error
64 int mdt_export_stats_init(struct obd_device *obd, struct obd_export *exp,
67 lnet_nid_t *client_nid = localdata;
68 struct nid_stat *stats;
72 rc = lprocfs_exp_setup(exp, client_nid);
74 /* Mask error for already created /proc entries */
75 RETURN(rc == -EALREADY ? 0 : rc);
77 stats = exp->exp_nid_stats;
78 stats->nid_stats = lprocfs_alloc_stats(LPROC_MDT_LAST,
79 LPROCFS_STATS_FLAG_NOPERCPU);
80 if (stats->nid_stats == NULL)
83 mdt_stats_counter_init(stats->nid_stats, 0);
85 rc = lprocfs_register_stats(stats->nid_proc, "stats", stats->nid_stats);
87 lprocfs_free_stats(&stats->nid_stats);
91 rc = lprocfs_nid_ldlm_stats_init(stats);
95 rc = lprocfs_seq_create(stats->nid_proc, "open_files",
96 0444, &mdt_open_files_seq_fops, stats);
98 CWARN("%s: error adding the open_files file: rc = %d\n",