kernel/drivers/staging/lustre/lustre/lov/lproc_lov.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) 2002, 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 #define DEBUG_SUBSYSTEM S_CLASS
  37
  38 #include <linux/statfs.h>
  39 #include "../include/lprocfs_status.h"
  40 #include "../include/obd_class.h"
  41 #include <linux/seq_file.h>
  42 #include "lov_internal.h"
  43
  44 static int lov_stripesize_seq_show(struct seq_file *m, void *v)
  45 {
  46         struct obd_device *dev = (struct obd_device *)m->private;
  47         struct lov_desc *desc;
  48
  49         LASSERT(dev != NULL);
  50         desc = &dev->u.lov.desc;
  51         seq_printf(m, "%llu\n", desc->ld_default_stripe_size);
  52         return 0;
  53 }
  54
  55 static ssize_t lov_stripesize_seq_write(struct file *file,
  56                                 const char __user *buffer,
  57                                 size_t count, loff_t *off)
  58 {
  59         struct obd_device *dev = ((struct seq_file *)file->private_data)->private;
  60         struct lov_desc *desc;
  61         __u64 val;
  62         int rc;
  63
  64         LASSERT(dev != NULL);
  65         desc = &dev->u.lov.desc;
  66         rc = lprocfs_write_u64_helper(buffer, count, &val);
  67         if (rc)
  68                 return rc;
  69
  70         lov_fix_desc_stripe_size(&val);
  71         desc->ld_default_stripe_size = val;
  72         return count;
  73 }
  74
  75 LPROC_SEQ_FOPS(lov_stripesize);
  76
  77 static int lov_stripeoffset_seq_show(struct seq_file *m, void *v)
  78 {
  79         struct obd_device *dev = (struct obd_device *)m->private;
  80         struct lov_desc *desc;
  81
  82         LASSERT(dev != NULL);
  83         desc = &dev->u.lov.desc;
  84         seq_printf(m, "%llu\n", desc->ld_default_stripe_offset);
  85         return 0;
  86 }
  87
  88 static ssize_t lov_stripeoffset_seq_write(struct file *file,
  89                                 const char __user *buffer,
  90                                 size_t count, loff_t *off)
  91 {
  92         struct obd_device *dev = ((struct seq_file *)file->private_data)->private;
  93         struct lov_desc *desc;
  94         __u64 val;
  95         int rc;
  96
  97         LASSERT(dev != NULL);
  98         desc = &dev->u.lov.desc;
  99         rc = lprocfs_write_u64_helper(buffer, count, &val);
 100         if (rc)
 101                 return rc;
 102
 103         desc->ld_default_stripe_offset = val;
 104         return count;
 105 }
 106
 107 LPROC_SEQ_FOPS(lov_stripeoffset);
 108
 109 static int lov_stripetype_seq_show(struct seq_file *m, void *v)
 110 {
 111         struct obd_device *dev = (struct obd_device *)m->private;
 112         struct lov_desc *desc;
 113
 114         LASSERT(dev != NULL);
 115         desc = &dev->u.lov.desc;
 116         seq_printf(m, "%u\n", desc->ld_pattern);
 117         return 0;
 118 }
 119
 120 static ssize_t lov_stripetype_seq_write(struct file *file,
 121                                 const char __user *buffer,
 122                                 size_t count, loff_t *off)
 123 {
 124         struct obd_device *dev = ((struct seq_file *)file->private_data)->private;
 125         struct lov_desc *desc;
 126         int val, rc;
 127
 128         LASSERT(dev != NULL);
 129         desc = &dev->u.lov.desc;
 130         rc = lprocfs_write_helper(buffer, count, &val);
 131         if (rc)
 132                 return rc;
 133
 134         lov_fix_desc_pattern(&val);
 135         desc->ld_pattern = val;
 136         return count;
 137 }
 138
 139 LPROC_SEQ_FOPS(lov_stripetype);
 140
 141 static int lov_stripecount_seq_show(struct seq_file *m, void *v)
 142 {
 143         struct obd_device *dev = (struct obd_device *)m->private;
 144         struct lov_desc *desc;
 145
 146         LASSERT(dev != NULL);
 147         desc = &dev->u.lov.desc;
 148         seq_printf(m, "%d\n", (__s16)(desc->ld_default_stripe_count + 1) - 1);
 149         return 0;
 150 }
 151
 152 static ssize_t lov_stripecount_seq_write(struct file *file,
 153                                 const char __user *buffer,
 154                                 size_t count, loff_t *off)
 155 {
 156         struct obd_device *dev = ((struct seq_file *)file->private_data)->private;
 157         struct lov_desc *desc;
 158         int val, rc;
 159
 160         LASSERT(dev != NULL);
 161         desc = &dev->u.lov.desc;
 162         rc = lprocfs_write_helper(buffer, count, &val);
 163         if (rc)
 164                 return rc;
 165
 166         lov_fix_desc_stripe_count(&val);
 167         desc->ld_default_stripe_count = val;
 168         return count;
 169 }
 170
 171 LPROC_SEQ_FOPS(lov_stripecount);
 172
 173 static ssize_t numobd_show(struct kobject *kobj, struct attribute *attr,
 174                            char *buf)
 175 {
 176         struct obd_device *dev = container_of(kobj, struct obd_device,
 177                                               obd_kobj);
 178         struct lov_desc *desc;
 179
 180         desc = &dev->u.lov.desc;
 181         return sprintf(buf, "%u\n", desc->ld_tgt_count);
 182 }
 183 LUSTRE_RO_ATTR(numobd);
 184
 185 static ssize_t activeobd_show(struct kobject *kobj, struct attribute *attr,
 186                               char *buf)
 187 {
 188         struct obd_device *dev = container_of(kobj, struct obd_device,
 189                                               obd_kobj);
 190         struct lov_desc *desc;
 191
 192         desc = &dev->u.lov.desc;
 193         return sprintf(buf, "%u\n", desc->ld_active_tgt_count);
 194 }
 195 LUSTRE_RO_ATTR(activeobd);
 196
 197 static int lov_desc_uuid_seq_show(struct seq_file *m, void *v)
 198 {
 199         struct obd_device *dev = (struct obd_device *)m->private;
 200         struct lov_obd *lov;
 201
 202         LASSERT(dev != NULL);
 203         lov = &dev->u.lov;
 204         seq_printf(m, "%s\n", lov->desc.ld_uuid.uuid);
 205         return 0;
 206 }
 207
 208 LPROC_SEQ_FOPS_RO(lov_desc_uuid);
 209
 210 static void *lov_tgt_seq_start(struct seq_file *p, loff_t *pos)
 211 {
 212         struct obd_device *dev = p->private;
 213         struct lov_obd *lov = &dev->u.lov;
 214
 215         while (*pos < lov->desc.ld_tgt_count) {
 216                 if (lov->lov_tgts[*pos])
 217                         return lov->lov_tgts[*pos];
 218                 ++*pos;
 219         }
 220         return NULL;
 221 }
 222
 223 static void lov_tgt_seq_stop(struct seq_file *p, void *v)
 224 {
 225 }
 226
 227 static void *lov_tgt_seq_next(struct seq_file *p, void *v, loff_t *pos)
 228 {
 229         struct obd_device *dev = p->private;
 230         struct lov_obd *lov = &dev->u.lov;
 231
 232         while (++*pos < lov->desc.ld_tgt_count) {
 233                 if (lov->lov_tgts[*pos])
 234                         return lov->lov_tgts[*pos];
 235         }
 236         return NULL;
 237 }
 238
 239 static int lov_tgt_seq_show(struct seq_file *p, void *v)
 240 {
 241         struct lov_tgt_desc *tgt = v;
 242
 243         seq_printf(p, "%d: %s %sACTIVE\n",
 244                    tgt->ltd_index, obd_uuid2str(&tgt->ltd_uuid),
 245                    tgt->ltd_active ? "" : "IN");
 246         return 0;
 247 }
 248
 249 static const struct seq_operations lov_tgt_sops = {
 250         .start = lov_tgt_seq_start,
 251         .stop = lov_tgt_seq_stop,
 252         .next = lov_tgt_seq_next,
 253         .show = lov_tgt_seq_show,
 254 };
 255
 256 static int lov_target_seq_open(struct inode *inode, struct file *file)
 257 {
 258         struct seq_file *seq;
 259         int rc;
 260
 261         rc = seq_open(file, &lov_tgt_sops);
 262         if (rc)
 263                 return rc;
 264
 265         seq = file->private_data;
 266         seq->private = inode->i_private;
 267         return 0;
 268 }
 269
 270 static struct lprocfs_vars lprocfs_lov_obd_vars[] = {
 271         { "stripesize",   &lov_stripesize_fops,   NULL },
 272         { "stripeoffset", &lov_stripeoffset_fops, NULL },
 273         { "stripecount",  &lov_stripecount_fops,  NULL },
 274         { "stripetype",   &lov_stripetype_fops,   NULL },
 275         /*{ "filegroups", lprocfs_rd_filegroups,  NULL, 0 },*/
 276         { "desc_uuid",    &lov_desc_uuid_fops,    NULL, 0 },
 277         { NULL }
 278 };
 279
 280 static struct attribute *lov_attrs[] = {
 281         &lustre_attr_activeobd.attr,
 282         &lustre_attr_numobd.attr,
 283         NULL,
 284 };
 285
 286 static struct attribute_group lov_attr_group = {
 287         .attrs = lov_attrs,
 288 };
 289
 290 void lprocfs_lov_init_vars(struct lprocfs_static_vars *lvars)
 291 {
 292         lvars->sysfs_vars = &lov_attr_group;
 293         lvars->obd_vars = lprocfs_lov_obd_vars;
 294 }
 295
 296 const struct file_operations lov_proc_target_fops = {
 297         .owner   = THIS_MODULE,
 298         .open    = lov_target_seq_open,
 299         .read    = seq_read,
 300         .llseek  = seq_lseek,
 301         .release = lprocfs_seq_release,
 302 };