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) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2012, 2015, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
32 * lustre/fld/lproc_fld.c
34 * FLD (FIDs Location Database)
36 * Author: Yury Umanets <umka@clusterfs.com>
37 * Di Wang <di.wang@whamcloud.com>
40 #define DEBUG_SUBSYSTEM S_FLD
42 #include "../../include/linux/libcfs/libcfs.h"
43 #include <linux/module.h>
45 #include "../include/obd.h"
46 #include "../include/obd_class.h"
47 #include "../include/obd_support.h"
48 #include "../include/lustre_req_layout.h"
49 #include "../include/lustre_fld.h"
50 #include "../include/lustre_fid.h"
51 #include "fld_internal.h"
54 fld_debugfs_targets_seq_show(struct seq_file *m, void *unused)
56 struct lu_client_fld *fld = (struct lu_client_fld *)m->private;
57 struct lu_fld_target *target;
59 spin_lock(&fld->lcf_lock);
60 list_for_each_entry(target, &fld->lcf_targets, ft_chain)
61 seq_printf(m, "%s\n", fld_target_name(target));
62 spin_unlock(&fld->lcf_lock);
68 fld_debugfs_hash_seq_show(struct seq_file *m, void *unused)
70 struct lu_client_fld *fld = (struct lu_client_fld *)m->private;
72 spin_lock(&fld->lcf_lock);
73 seq_printf(m, "%s\n", fld->lcf_hash->fh_name);
74 spin_unlock(&fld->lcf_lock);
80 fld_debugfs_hash_seq_write(struct file *file,
81 const char __user *buffer,
82 size_t count, loff_t *off)
84 struct lu_client_fld *fld;
85 struct lu_fld_hash *hash = NULL;
89 if (count > sizeof(fh_name))
92 if (copy_from_user(fh_name, buffer, count) != 0)
95 fld = ((struct seq_file *)file->private_data)->private;
97 for (i = 0; fld_hash[i].fh_name; i++) {
98 if (count != strlen(fld_hash[i].fh_name))
101 if (!strncmp(fld_hash[i].fh_name, fh_name, count)) {
108 spin_lock(&fld->lcf_lock);
109 fld->lcf_hash = hash;
110 spin_unlock(&fld->lcf_lock);
112 CDEBUG(D_INFO, "%s: Changed hash to \"%s\"\n",
113 fld->lcf_name, hash->fh_name);
120 fld_debugfs_cache_flush_write(struct file *file, const char __user *buffer,
121 size_t count, loff_t *pos)
123 struct lu_client_fld *fld = file->private_data;
125 fld_cache_flush(fld->lcf_cache);
127 CDEBUG(D_INFO, "%s: Lookup cache is flushed\n", fld->lcf_name);
133 fld_debugfs_cache_flush_release(struct inode *inode, struct file *file)
135 file->private_data = NULL;
139 static struct file_operations fld_debugfs_cache_flush_fops = {
140 .owner = THIS_MODULE,
142 .write = fld_debugfs_cache_flush_write,
143 .release = fld_debugfs_cache_flush_release,
146 LPROC_SEQ_FOPS_RO(fld_debugfs_targets);
147 LPROC_SEQ_FOPS(fld_debugfs_hash);
149 struct lprocfs_vars fld_client_debugfs_list[] = {
150 { "targets", &fld_debugfs_targets_fops },
151 { "hash", &fld_debugfs_hash_fops },
152 { "cache_flush", &fld_debugfs_cache_flush_fops },