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) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2012, 2013, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/fld/lproc_fld.c
38 * FLD (FIDs Location Database)
40 * Author: Yury Umanets <umka@clusterfs.com>
41 * Di Wang <di.wang@whamcloud.com>
44 #define DEBUG_SUBSYSTEM S_FLD
46 # include <linux/libcfs/libcfs.h>
47 # include <linux/module.h>
50 #include <obd_class.h>
51 #include <dt_object.h>
52 #include <md_object.h>
53 #include <obd_support.h>
54 #include <lustre_req_layout.h>
55 #include <lustre_fld.h>
56 #include <lustre_fid.h>
57 #include "fld_internal.h"
61 fld_proc_targets_seq_show(struct seq_file
*m
, void *unused
)
63 struct lu_client_fld
*fld
= (struct lu_client_fld
*)m
->private;
64 struct lu_fld_target
*target
;
68 spin_lock(&fld
->lcf_lock
);
69 list_for_each_entry(target
,
70 &fld
->lcf_targets
, ft_chain
)
71 seq_printf(m
, "%s\n", fld_target_name(target
));
72 spin_unlock(&fld
->lcf_lock
);
78 fld_proc_hash_seq_show(struct seq_file
*m
, void *unused
)
80 struct lu_client_fld
*fld
= (struct lu_client_fld
*)m
->private;
84 spin_lock(&fld
->lcf_lock
);
85 seq_printf(m
, "%s\n", fld
->lcf_hash
->fh_name
);
86 spin_unlock(&fld
->lcf_lock
);
92 fld_proc_hash_seq_write(struct file
*file
, const char *buffer
,
93 size_t count
, loff_t
*off
)
95 struct lu_client_fld
*fld
= ((struct seq_file
*)file
->private_data
)->private;
96 struct lu_fld_hash
*hash
= NULL
;
101 for (i
= 0; fld_hash
[i
].fh_name
!= NULL
; i
++) {
102 if (count
!= strlen(fld_hash
[i
].fh_name
))
105 if (!strncmp(fld_hash
[i
].fh_name
, buffer
, count
)) {
112 spin_lock(&fld
->lcf_lock
);
113 fld
->lcf_hash
= hash
;
114 spin_unlock(&fld
->lcf_lock
);
116 CDEBUG(D_INFO
, "%s: Changed hash to \"%s\"\n",
117 fld
->lcf_name
, hash
->fh_name
);
124 fld_proc_cache_flush_write(struct file
*file
, const char __user
*buffer
,
125 size_t count
, loff_t
*pos
)
127 struct lu_client_fld
*fld
= file
->private_data
;
129 LASSERT(fld
!= NULL
);
131 fld_cache_flush(fld
->lcf_cache
);
133 CDEBUG(D_INFO
, "%s: Lookup cache is flushed\n", fld
->lcf_name
);
138 static int fld_proc_cache_flush_open(struct inode
*inode
, struct file
*file
)
140 file
->private_data
= PDE_DATA(inode
);
144 static int fld_proc_cache_flush_release(struct inode
*inode
, struct file
*file
)
146 file
->private_data
= NULL
;
150 struct file_operations fld_proc_cache_flush_fops
= {
151 .owner
= THIS_MODULE
,
152 .open
= fld_proc_cache_flush_open
,
153 .write
= fld_proc_cache_flush_write
,
154 .release
= fld_proc_cache_flush_release
,
157 LPROC_SEQ_FOPS_RO(fld_proc_targets
);
158 LPROC_SEQ_FOPS(fld_proc_hash
);
160 struct lprocfs_vars fld_client_proc_list
[] = {
161 { "targets", &fld_proc_targets_fops
},
162 { "hash", &fld_proc_hash_fops
},
163 { "cache_flush", &fld_proc_cache_flush_fops
},