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) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
29 *
30 * Copyright (c) 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
37 #define DEBUG_SUBSYSTEM S_CLASS
38
39 #include <linux/seq_file.h>
40 #include <linux/statfs.h>
41 #include "../include/lprocfs_status.h"
42 #include "../include/obd_class.h"
43 #include "lmv_internal.h"
44
lmv_numobd_seq_show(struct seq_file * m,void * v)45 static int lmv_numobd_seq_show(struct seq_file *m, void *v)
46 {
47 struct obd_device *dev = (struct obd_device *)m->private;
48 struct lmv_desc *desc;
49
50 LASSERT(dev != NULL);
51 desc = &dev->u.lmv.desc;
52 seq_printf(m, "%u\n", desc->ld_tgt_count);
53 return 0;
54 }
55 LPROC_SEQ_FOPS_RO(lmv_numobd);
56
57 static const char *placement_name[] = {
58 [PLACEMENT_CHAR_POLICY] = "CHAR",
59 [PLACEMENT_NID_POLICY] = "NID",
60 [PLACEMENT_INVAL_POLICY] = "INVAL"
61 };
62
placement_name2policy(char * name,int len)63 static enum placement_policy placement_name2policy(char *name, int len)
64 {
65 int i;
66
67 for (i = 0; i < PLACEMENT_MAX_POLICY; i++) {
68 if (!strncmp(placement_name[i], name, len))
69 return i;
70 }
71 return PLACEMENT_INVAL_POLICY;
72 }
73
placement_policy2name(enum placement_policy placement)74 static const char *placement_policy2name(enum placement_policy placement)
75 {
76 LASSERT(placement < PLACEMENT_MAX_POLICY);
77 return placement_name[placement];
78 }
79
lmv_placement_seq_show(struct seq_file * m,void * v)80 static int lmv_placement_seq_show(struct seq_file *m, void *v)
81 {
82 struct obd_device *dev = (struct obd_device *)m->private;
83 struct lmv_obd *lmv;
84
85 LASSERT(dev != NULL);
86 lmv = &dev->u.lmv;
87 seq_printf(m, "%s\n", placement_policy2name(lmv->lmv_placement));
88 return 0;
89 }
90
91 #define MAX_POLICY_STRING_SIZE 64
92
lmv_placement_seq_write(struct file * file,const char __user * buffer,size_t count,loff_t * off)93 static ssize_t lmv_placement_seq_write(struct file *file,
94 const char __user *buffer,
95 size_t count, loff_t *off)
96 {
97 struct obd_device *dev = ((struct seq_file *)file->private_data)->private;
98 char dummy[MAX_POLICY_STRING_SIZE + 1];
99 int len = count;
100 enum placement_policy policy;
101 struct lmv_obd *lmv;
102
103 if (copy_from_user(dummy, buffer, MAX_POLICY_STRING_SIZE))
104 return -EFAULT;
105
106 LASSERT(dev != NULL);
107 lmv = &dev->u.lmv;
108
109 if (len > MAX_POLICY_STRING_SIZE)
110 len = MAX_POLICY_STRING_SIZE;
111
112 if (dummy[len - 1] == '\n')
113 len--;
114 dummy[len] = '\0';
115
116 policy = placement_name2policy(dummy, len);
117 if (policy != PLACEMENT_INVAL_POLICY) {
118 spin_lock(&lmv->lmv_lock);
119 lmv->lmv_placement = policy;
120 spin_unlock(&lmv->lmv_lock);
121 } else {
122 CERROR("Invalid placement policy \"%s\"!\n", dummy);
123 return -EINVAL;
124 }
125 return count;
126 }
127 LPROC_SEQ_FOPS(lmv_placement);
128
lmv_activeobd_seq_show(struct seq_file * m,void * v)129 static int lmv_activeobd_seq_show(struct seq_file *m, void *v)
130 {
131 struct obd_device *dev = (struct obd_device *)m->private;
132 struct lmv_desc *desc;
133
134 LASSERT(dev != NULL);
135 desc = &dev->u.lmv.desc;
136 seq_printf(m, "%u\n", desc->ld_active_tgt_count);
137 return 0;
138 }
139 LPROC_SEQ_FOPS_RO(lmv_activeobd);
140
lmv_desc_uuid_seq_show(struct seq_file * m,void * v)141 static int lmv_desc_uuid_seq_show(struct seq_file *m, void *v)
142 {
143 struct obd_device *dev = (struct obd_device *)m->private;
144 struct lmv_obd *lmv;
145
146 LASSERT(dev != NULL);
147 lmv = &dev->u.lmv;
148 seq_printf(m, "%s\n", lmv->desc.ld_uuid.uuid);
149 return 0;
150 }
151 LPROC_SEQ_FOPS_RO(lmv_desc_uuid);
152
lmv_tgt_seq_start(struct seq_file * p,loff_t * pos)153 static void *lmv_tgt_seq_start(struct seq_file *p, loff_t *pos)
154 {
155 struct obd_device *dev = p->private;
156 struct lmv_obd *lmv = &dev->u.lmv;
157 return (*pos >= lmv->desc.ld_tgt_count) ? NULL : lmv->tgts[*pos];
158 }
159
lmv_tgt_seq_stop(struct seq_file * p,void * v)160 static void lmv_tgt_seq_stop(struct seq_file *p, void *v)
161 {
162 return;
163 }
164
lmv_tgt_seq_next(struct seq_file * p,void * v,loff_t * pos)165 static void *lmv_tgt_seq_next(struct seq_file *p, void *v, loff_t *pos)
166 {
167 struct obd_device *dev = p->private;
168 struct lmv_obd *lmv = &dev->u.lmv;
169 ++*pos;
170 return (*pos >= lmv->desc.ld_tgt_count) ? NULL : lmv->tgts[*pos];
171 }
172
lmv_tgt_seq_show(struct seq_file * p,void * v)173 static int lmv_tgt_seq_show(struct seq_file *p, void *v)
174 {
175 struct lmv_tgt_desc *tgt = v;
176
177 if (tgt == NULL)
178 return 0;
179 seq_printf(p, "%d: %s %sACTIVE\n",
180 tgt->ltd_idx, tgt->ltd_uuid.uuid,
181 tgt->ltd_active ? "" : "IN");
182 return 0;
183 }
184
185 static struct seq_operations lmv_tgt_sops = {
186 .start = lmv_tgt_seq_start,
187 .stop = lmv_tgt_seq_stop,
188 .next = lmv_tgt_seq_next,
189 .show = lmv_tgt_seq_show,
190 };
191
lmv_target_seq_open(struct inode * inode,struct file * file)192 static int lmv_target_seq_open(struct inode *inode, struct file *file)
193 {
194 struct seq_file *seq;
195 int rc;
196
197 rc = seq_open(file, &lmv_tgt_sops);
198 if (rc)
199 return rc;
200
201 seq = file->private_data;
202 seq->private = PDE_DATA(inode);
203
204 return 0;
205 }
206
207 LPROC_SEQ_FOPS_RO_TYPE(lmv, uuid);
208
209 static struct lprocfs_vars lprocfs_lmv_obd_vars[] = {
210 { "numobd", &lmv_numobd_fops, NULL, 0 },
211 { "placement", &lmv_placement_fops, NULL, 0 },
212 { "activeobd", &lmv_activeobd_fops, NULL, 0 },
213 { "uuid", &lmv_uuid_fops, NULL, 0 },
214 { "desc_uuid", &lmv_desc_uuid_fops, NULL, 0 },
215 { NULL }
216 };
217
218 LPROC_SEQ_FOPS_RO_TYPE(lmv, numrefs);
219
220 static struct lprocfs_vars lprocfs_lmv_module_vars[] = {
221 { "num_refs", &lmv_numrefs_fops, NULL, 0 },
222 { NULL }
223 };
224
225 struct file_operations lmv_proc_target_fops = {
226 .owner = THIS_MODULE,
227 .open = lmv_target_seq_open,
228 .read = seq_read,
229 .llseek = seq_lseek,
230 .release = seq_release,
231 };
232
lprocfs_lmv_init_vars(struct lprocfs_static_vars * lvars)233 void lprocfs_lmv_init_vars(struct lprocfs_static_vars *lvars)
234 {
235 lvars->module_vars = lprocfs_lmv_module_vars;
236 lvars->obd_vars = lprocfs_lmv_obd_vars;
237 }
238