Add the rt linux 4.1.3-rt3 as base
[kvmfornfv.git] / kernel / drivers / staging / lustre / lustre / fid / lproc_fid.c
1 /*
2  * GPL HEADER START
3  *
4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5  *
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.
9  *
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).
15  *
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
19  *
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
22  * have any questions.
23  *
24  * GPL HEADER END
25  */
26 /*
27  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
28  * Use is subject to license terms.
29  *
30  * Copyright (c) 2011, 2012, Intel Corporation.
31  */
32 /*
33  * This file is part of Lustre, http://www.lustre.org/
34  * Lustre is a trademark of Sun Microsystems, Inc.
35  *
36  * lustre/fid/lproc_fid.c
37  *
38  * Lustre Sequence Manager
39  *
40  * Author: Yury Umanets <umka@clusterfs.com>
41  */
42
43 #define DEBUG_SUBSYSTEM S_FID
44
45 #include "../../include/linux/libcfs/libcfs.h"
46 #include <linux/module.h>
47
48 #include "../include/obd.h"
49 #include "../include/obd_class.h"
50 #include "../include/dt_object.h"
51 #include "../include/obd_support.h"
52 #include "../include/lustre_req_layout.h"
53 #include "../include/lustre_fid.h"
54 #include "fid_internal.h"
55
56 /* Format: [0x64BIT_INT - 0x64BIT_INT] + 32 bytes just in case */
57 #define MAX_FID_RANGE_STRLEN (32 + 2 * 2 * sizeof(__u64))
58 /*
59  * Note: this function is only used for testing, it is no safe for production
60  * use.
61  */
62 static int lprocfs_fid_write_common(const char __user *buffer, size_t count,
63                                     struct lu_seq_range *range)
64 {
65         struct lu_seq_range tmp;
66         int rc;
67         char kernbuf[MAX_FID_RANGE_STRLEN];
68
69         LASSERT(range != NULL);
70
71         if (count >= sizeof(kernbuf))
72                 return -EINVAL;
73
74         if (copy_from_user(kernbuf, buffer, count))
75                 return -EFAULT;
76
77         kernbuf[count] = 0;
78
79         if (count == 5 && strcmp(kernbuf, "clear") == 0) {
80                 memset(range, 0, sizeof(*range));
81                 return count;
82         }
83
84         /* of the form "[0x0000000240000400 - 0x000000028000400]" */
85         rc = sscanf(kernbuf, "[%llx - %llx]\n",
86                     (unsigned long long *)&tmp.lsr_start,
87                     (unsigned long long *)&tmp.lsr_end);
88         if (!range_is_sane(&tmp) || range_is_zero(&tmp) ||
89             tmp.lsr_start < range->lsr_start || tmp.lsr_end > range->lsr_end)
90                 return -EINVAL;
91         *range = tmp;
92         return count;
93 }
94
95 /* Client side procfs stuff */
96 static ssize_t lprocfs_fid_space_seq_write(struct file *file,
97                                            const char __user *buffer,
98                                            size_t count, loff_t *off)
99 {
100         struct lu_client_seq *seq;
101         int rc;
102
103         seq = ((struct seq_file *)file->private_data)->private;
104         LASSERT(seq != NULL);
105
106         mutex_lock(&seq->lcs_mutex);
107         rc = lprocfs_fid_write_common(buffer, count, &seq->lcs_space);
108
109         if (rc == 0) {
110                 CDEBUG(D_INFO, "%s: Space: "DRANGE"\n",
111                        seq->lcs_name, PRANGE(&seq->lcs_space));
112         }
113
114         mutex_unlock(&seq->lcs_mutex);
115
116         return count;
117 }
118
119 static int
120 lprocfs_fid_space_seq_show(struct seq_file *m, void *unused)
121 {
122         struct lu_client_seq *seq = (struct lu_client_seq *)m->private;
123
124         LASSERT(seq != NULL);
125
126         mutex_lock(&seq->lcs_mutex);
127         seq_printf(m, "[%#llx - %#llx]:%x:%s\n", PRANGE(&seq->lcs_space));
128         mutex_unlock(&seq->lcs_mutex);
129
130         return 0;
131 }
132
133 static ssize_t lprocfs_fid_width_seq_write(struct file *file,
134                                            const char __user *buffer,
135                                            size_t count, loff_t *off)
136 {
137         struct lu_client_seq *seq;
138         __u64  max;
139         int rc, val;
140
141         seq = ((struct seq_file *)file->private_data)->private;
142         LASSERT(seq != NULL);
143
144         rc = lprocfs_write_helper(buffer, count, &val);
145         if (rc)
146                 return rc;
147
148         mutex_lock(&seq->lcs_mutex);
149         if (seq->lcs_type == LUSTRE_SEQ_DATA)
150                 max = LUSTRE_DATA_SEQ_MAX_WIDTH;
151         else
152                 max = LUSTRE_METADATA_SEQ_MAX_WIDTH;
153
154         if (val <= max && val > 0) {
155                 seq->lcs_width = val;
156
157                 if (rc == 0) {
158                         CDEBUG(D_INFO, "%s: Sequence size: %llu\n",
159                                seq->lcs_name, seq->lcs_width);
160                 }
161         }
162
163         mutex_unlock(&seq->lcs_mutex);
164
165         return count;
166 }
167
168 static int
169 lprocfs_fid_width_seq_show(struct seq_file *m, void *unused)
170 {
171         struct lu_client_seq *seq = (struct lu_client_seq *)m->private;
172
173         LASSERT(seq != NULL);
174
175         mutex_lock(&seq->lcs_mutex);
176         seq_printf(m, "%llu\n", seq->lcs_width);
177         mutex_unlock(&seq->lcs_mutex);
178
179         return 0;
180 }
181
182 static int
183 lprocfs_fid_fid_seq_show(struct seq_file *m, void *unused)
184 {
185         struct lu_client_seq *seq = (struct lu_client_seq *)m->private;
186
187         LASSERT(seq != NULL);
188
189         mutex_lock(&seq->lcs_mutex);
190         seq_printf(m, DFID "\n", PFID(&seq->lcs_fid));
191         mutex_unlock(&seq->lcs_mutex);
192
193         return 0;
194 }
195
196 static int
197 lprocfs_fid_server_seq_show(struct seq_file *m, void *unused)
198 {
199         struct lu_client_seq *seq = (struct lu_client_seq *)m->private;
200         struct client_obd *cli;
201
202         LASSERT(seq != NULL);
203
204         if (seq->lcs_exp != NULL) {
205                 cli = &seq->lcs_exp->exp_obd->u.cli;
206                 seq_printf(m, "%s\n", cli->cl_target_uuid.uuid);
207         } else {
208                 seq_printf(m, "%s\n", seq->lcs_srv->lss_name);
209         }
210
211         return 0;
212 }
213
214 LPROC_SEQ_FOPS(lprocfs_fid_space);
215 LPROC_SEQ_FOPS(lprocfs_fid_width);
216 LPROC_SEQ_FOPS_RO(lprocfs_fid_server);
217 LPROC_SEQ_FOPS_RO(lprocfs_fid_fid);
218
219 struct lprocfs_vars seq_client_proc_list[] = {
220         { "space", &lprocfs_fid_space_fops },
221         { "width", &lprocfs_fid_width_fops },
222         { "server", &lprocfs_fid_server_fops },
223         { "fid", &lprocfs_fid_fid_fops },
224         { NULL }
225 };