1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
37 #define DEBUG_SUBSYSTEM S_CLASS
39 #include <linux/version.h>
40 #include <linux/seq_file.h>
41 #include <asm/statfs.h>
42 #include <lprocfs_status.h>
43 #include <obd_class.h>
46 static struct lprocfs_vars lprocfs_module_vars[] = { {0} };
47 static struct lprocfs_vars lprocfs_obd_vars[] = { {0} };
49 static int lmv_rd_numobd(char *page, char **start, off_t off, int count,
52 struct obd_device *dev = (struct obd_device*)data;
53 struct lmv_desc *desc;
56 desc = &dev->u.lmv.desc;
58 return snprintf(page, count, "%u\n", desc->ld_tgt_count);
62 static const char *placement_name[] = {
63 [PLACEMENT_CHAR_POLICY] = "CHAR",
64 [PLACEMENT_NID_POLICY] = "NID"
67 static placement_policy_t placement_name2policy(char *name, int len)
71 for (i = 0; i < PLACEMENT_MAX_POLICY; i++) {
72 if (!strncmp(placement_name[i], name, len))
75 return PLACEMENT_INVAL_POLICY;
78 static const char *placement_policy2name(placement_policy_t placement)
80 LASSERT(placement < PLACEMENT_MAX_POLICY);
81 return placement_name[placement];
84 static int lmv_rd_placement(char *page, char **start, off_t off, int count,
87 struct obd_device *dev = (struct obd_device*)data;
93 return snprintf(page, count, "%s\n",
94 placement_policy2name(lmv->lmv_placement));
98 #define MAX_POLICY_STRING_SIZE 64
100 static int lmv_wr_placement(struct file *file, const char *buffer,
101 unsigned long count, void *data)
103 struct obd_device *dev = (struct obd_device *)data;
104 char dummy[MAX_POLICY_STRING_SIZE + 1];
106 placement_policy_t policy;
109 if (cfs_copy_from_user(dummy, buffer, MAX_POLICY_STRING_SIZE))
112 LASSERT(dev != NULL);
115 if (len > MAX_POLICY_STRING_SIZE)
116 len = MAX_POLICY_STRING_SIZE;
118 if (dummy[len - 1] == '\n')
122 policy = placement_name2policy(dummy, len);
123 if (policy != PLACEMENT_INVAL_POLICY) {
124 cfs_spin_lock(&lmv->lmv_lock);
125 lmv->lmv_placement = policy;
126 cfs_spin_unlock(&lmv->lmv_lock);
128 CERROR("Invalid placement policy \"%s\"!\n", dummy);
134 static int lmv_rd_activeobd(char *page, char **start, off_t off, int count,
135 int *eof, void *data)
137 struct obd_device *dev = (struct obd_device*)data;
138 struct lmv_desc *desc;
140 LASSERT(dev != NULL);
141 desc = &dev->u.lmv.desc;
143 return snprintf(page, count, "%u\n", desc->ld_active_tgt_count);
146 static int lmv_rd_desc_uuid(char *page, char **start, off_t off, int count,
147 int *eof, void *data)
149 struct obd_device *dev = (struct obd_device*) data;
152 LASSERT(dev != NULL);
155 return snprintf(page, count, "%s\n", lmv->desc.ld_uuid.uuid);
158 static void *lmv_tgt_seq_start(struct seq_file *p, loff_t *pos)
160 struct obd_device *dev = p->private;
161 struct lmv_obd *lmv = &dev->u.lmv;
162 return (*pos >= lmv->desc.ld_tgt_count) ? NULL : &(lmv->tgts[*pos]);
166 static void lmv_tgt_seq_stop(struct seq_file *p, void *v)
171 static void *lmv_tgt_seq_next(struct seq_file *p, void *v, loff_t *pos)
173 struct obd_device *dev = p->private;
174 struct lmv_obd *lmv = &dev->u.lmv;
176 return (*pos >=lmv->desc.ld_tgt_count) ? NULL : &(lmv->tgts[*pos]);
179 static int lmv_tgt_seq_show(struct seq_file *p, void *v)
181 struct lmv_tgt_desc *tgt = v;
182 struct obd_device *dev = p->private;
183 struct lmv_obd *lmv = &dev->u.lmv;
184 int idx = tgt - &(lmv->tgts[0]);
186 return seq_printf(p, "%d: %s %sACTIVE\n", idx, tgt->ltd_uuid.uuid,
187 tgt->ltd_active ? "" : "IN");
190 struct seq_operations lmv_tgt_sops = {
191 .start = lmv_tgt_seq_start,
192 .stop = lmv_tgt_seq_stop,
193 .next = lmv_tgt_seq_next,
194 .show = lmv_tgt_seq_show,
197 static int lmv_target_seq_open(struct inode *inode, struct file *file)
199 struct proc_dir_entry *dp = PDE(inode);
200 struct seq_file *seq;
203 rc = seq_open(file, &lmv_tgt_sops);
207 seq = file->private_data;
208 seq->private = dp->data;
213 struct lprocfs_vars lprocfs_lmv_obd_vars[] = {
214 { "numobd", lmv_rd_numobd, 0, 0 },
215 { "placement", lmv_rd_placement, lmv_wr_placement, 0 },
216 { "activeobd", lmv_rd_activeobd, 0, 0 },
217 { "uuid", lprocfs_rd_uuid, 0, 0 },
218 { "desc_uuid", lmv_rd_desc_uuid, 0, 0 },
222 static struct lprocfs_vars lprocfs_lmv_module_vars[] = {
223 { "num_refs", lprocfs_rd_numrefs, 0, 0 },
227 struct file_operations lmv_proc_target_fops = {
228 .owner = THIS_MODULE,
229 .open = lmv_target_seq_open,
232 .release = seq_release,
236 void lprocfs_lmv_init_vars(struct lprocfs_static_vars *lvars)
238 lvars->module_vars = lprocfs_lmv_module_vars;
239 lvars->obd_vars = lprocfs_lmv_obd_vars;