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.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2012, 2017, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  * Lustre is a trademark of Sun Microsystems, Inc.
  31  */
  32 #define DEBUG_SUBSYSTEM S_CLASS
  33
  34 #include <linux/version.h>
  35 #include <asm/statfs.h>
  36 #include <lprocfs_status.h>
  37 #include <obd_class.h>
  38 #include <uapi/linux/lustre/lustre_param.h>
  39 #include "lov_internal.h"
  40
  41 static int lov_stripesize_seq_show(struct seq_file *m, void *v)
  42 {
  43         struct obd_device *dev = (struct obd_device *)m->private;
  44         struct lov_desc *desc;
  45
  46         LASSERT(dev != NULL);
  47         desc = &dev->u.lov.desc;
  48
  49         seq_printf(m, "%llu\n", desc->ld_default_stripe_size);
  50         return 0;
  51 }
  52
  53 static ssize_t lov_stripesize_seq_write(struct file *file,
  54                                         const char __user *buffer,
  55                                         size_t count, loff_t *off)
  56 {
  57         struct obd_device *dev = ((struct seq_file *)file->private_data)->private;
  58         struct lov_desc *desc;
  59         s64 val;
  60         int rc;
  61
  62         LASSERT(dev != NULL);
  63         desc = &dev->u.lov.desc;
  64         rc = lprocfs_str_with_units_to_s64(buffer, count, &val, '1');
  65         if (rc)
  66                 return rc;
  67         if (val < 0)
  68                 return -ERANGE;
  69
  70         lov_fix_desc_stripe_size(&val);
  71         desc->ld_default_stripe_size = val;
  72
  73         return count;
  74 }
  75 LPROC_SEQ_FOPS(lov_stripesize);
  76
  77 static ssize_t stripeoffset_show(struct kobject *kobj, struct attribute *attr,
  78                                  char *buf)
  79 {
  80         struct obd_device *dev = container_of(kobj, struct obd_device,
  81                                               obd_kset.kobj);
  82         struct lov_desc *desc = &dev->u.lov.desc;
  83
  84         return sprintf(buf, "%lld\n", desc->ld_default_stripe_offset);
  85 }
  86
  87 static ssize_t stripeoffset_store(struct kobject *kobj, struct attribute *attr,
  88                                   const char *buf, size_t count)
  89 {
  90         struct obd_device *dev = container_of(kobj, struct obd_device,
  91                                               obd_kset.kobj);
  92         struct lov_desc *desc = &dev->u.lov.desc;
  93         long val;
  94         int rc;
  95
  96         rc = kstrtol(buf, 0, &val);
  97         if (rc)
  98                 return rc;
  99         if (val < -1 || val > LOV_MAX_STRIPE_COUNT)
 100                 return -ERANGE;
 101
 102         desc->ld_default_stripe_offset = val;
 103
 104         return count;
 105 }
 106 LUSTRE_RW_ATTR(stripeoffset);
 107
 108 static ssize_t stripetype_show(struct kobject *kobj, struct attribute *attr,
 109                                char *buf)
 110 {
 111         struct obd_device *dev = container_of(kobj, struct obd_device,
 112                                               obd_kset.kobj);
 113         struct lov_desc *desc = &dev->u.lov.desc;
 114
 115         return sprintf(buf, "%u\n", desc->ld_pattern);
 116 }
 117
 118 static ssize_t stripetype_store(struct kobject *kobj, struct attribute *attr,
 119                                 const char *buffer, size_t count)
 120 {
 121         struct obd_device *dev = container_of(kobj, struct obd_device,
 122                                               obd_kset.kobj);
 123         struct lov_desc *desc = &dev->u.lov.desc;
 124         u32 pattern;
 125         int rc;
 126
 127         rc = kstrtouint(buffer, 0, &pattern);
 128         if (rc)
 129                 return rc;
 130
 131         lov_fix_desc_pattern(&pattern);
 132         desc->ld_pattern = pattern;
 133
 134         return count;
 135 }
 136 LUSTRE_RW_ATTR(stripetype);
 137
 138 static ssize_t stripecount_show(struct kobject *kobj, struct attribute *attr,
 139                                 char *buf)
 140 {
 141         struct obd_device *dev = container_of(kobj, struct obd_device,
 142                                               obd_kset.kobj);
 143         struct lov_desc *desc = &dev->u.lov.desc;
 144
 145         return sprintf(buf, "%d\n",
 146                        (__s16)(desc->ld_default_stripe_count + 1) - 1);
 147 }
 148
 149 static ssize_t stripecount_store(struct kobject *kobj, struct attribute *attr,
 150                                  const char *buffer, size_t count)
 151 {
 152         struct obd_device *dev = container_of(kobj, struct obd_device,
 153                                               obd_kset.kobj);
 154         struct lov_desc *desc = &dev->u.lov.desc;
 155         int stripe_count;
 156         int rc;
 157
 158         rc = kstrtoint(buffer, 0, &stripe_count);
 159         if (rc)
 160                 return rc;
 161
 162         if (stripe_count < -1)
 163                 return -ERANGE;
 164
 165         lov_fix_desc_stripe_count(&stripe_count);
 166         desc->ld_default_stripe_count = stripe_count;
 167
 168         return count;
 169 }
 170 LUSTRE_RW_ATTR(stripecount);
 171
 172 static ssize_t numobd_show(struct kobject *kobj, struct attribute *attr,
 173                            char *buf)
 174 {
 175         struct obd_device *dev = container_of(kobj, struct obd_device,
 176                                               obd_kset.kobj);
 177         struct lov_desc *desc = &dev->u.lov.desc;
 178
 179         return sprintf(buf, "%u\n", desc->ld_tgt_count);
 180 }
 181 LUSTRE_RO_ATTR(numobd);
 182
 183 static ssize_t activeobd_show(struct kobject *kobj, struct attribute *attr,
 184                               char *buf)
 185 {
 186         struct obd_device *dev = container_of(kobj, struct obd_device,
 187                                               obd_kset.kobj);
 188         struct lov_desc *desc = &dev->u.lov.desc;
 189
 190         return sprintf(buf, "%u\n", desc->ld_active_tgt_count);
 191 }
 192 LUSTRE_RO_ATTR(activeobd);
 193
 194 static ssize_t desc_uuid_show(struct kobject *kobj, struct attribute *attr,
 195                               char *buf)
 196 {
 197         struct obd_device *dev = container_of(kobj, struct obd_device,
 198                                               obd_kset.kobj);
 199         struct lov_desc *desc = &dev->u.lov.desc;
 200
 201         return sprintf(buf, "%s\n", desc->ld_uuid.uuid);
 202 }
 203 LUSTRE_RO_ATTR(desc_uuid);
 204
 205 #ifdef CONFIG_PROC_FS
 206 static void *lov_tgt_seq_start(struct seq_file *p, loff_t *pos)
 207 {
 208         struct obd_device *dev = p->private;
 209         struct lov_obd *lov = &dev->u.lov;
 210
 211         while (*pos < lov->desc.ld_tgt_count) {
 212                 if (lov->lov_tgts[*pos])
 213                         return lov->lov_tgts[*pos];
 214                 ++*pos;
 215         }
 216         return NULL;
 217 }
 218
 219 static void lov_tgt_seq_stop(struct seq_file *p, void *v)
 220 {
 221 }
 222
 223 static void *lov_tgt_seq_next(struct seq_file *p, void *v, loff_t *pos)
 224 {
 225         struct obd_device *dev = p->private;
 226         struct lov_obd *lov = &dev->u.lov;
 227
 228         while (++*pos < lov->desc.ld_tgt_count) {
 229                 if (lov->lov_tgts[*pos])
 230                         return lov->lov_tgts[*pos];
 231         }
 232         return NULL;
 233 }
 234
 235 static int lov_tgt_seq_show(struct seq_file *p, void *v)
 236 {
 237         struct lov_tgt_desc *tgt = v;
 238
 239         seq_printf(p, "%d: %s %sACTIVE\n", tgt->ltd_index,
 240                    obd_uuid2str(&tgt->ltd_uuid),
 241                    tgt->ltd_active ? "" : "IN");
 242         return 0;
 243 }
 244
 245 static const struct seq_operations lov_tgt_sops = {
 246         .start = lov_tgt_seq_start,
 247         .stop = lov_tgt_seq_stop,
 248         .next = lov_tgt_seq_next,
 249         .show = lov_tgt_seq_show,
 250 };
 251
 252 static int lov_target_seq_open(struct inode *inode, struct file *file)
 253 {
 254         struct seq_file *seq;
 255         int rc;
 256
 257         rc = seq_open(file, &lov_tgt_sops);
 258         if (rc)
 259                 return rc;
 260
 261         seq = file->private_data;
 262         seq->private = PDE_DATA(inode);
 263         return 0;
 264 }
 265
 266 struct lprocfs_vars lprocfs_lov_obd_vars[] = {
 267         { .name =       "stripesize",
 268           .fops =       &lov_stripesize_fops    },
 269         { NULL }
 270 };
 271
 272 const struct file_operations lov_proc_target_fops = {
 273         .owner   = THIS_MODULE,
 274         .open    = lov_target_seq_open,
 275         .read    = seq_read,
 276         .llseek  = seq_lseek,
 277         .release = lprocfs_seq_release,
 278 };
 279 #endif /* CONFIG_PROC_FS */
 280
 281 static struct attribute *lov_attrs[] = {
 282         &lustre_attr_activeobd.attr,
 283         &lustre_attr_numobd.attr,
 284         &lustre_attr_desc_uuid.attr,
 285         &lustre_attr_stripeoffset.attr,
 286         &lustre_attr_stripetype.attr,
 287         &lustre_attr_stripecount.attr,
 288         NULL,
 289 };
 290
 291 int lov_tunables_init(struct obd_device *obd)
 292 {
 293         struct lov_obd *lov = &obd->u.lov;
 294 #if defined(CONFIG_PROC_FS) && defined(HAVE_SERVER_SUPPORT)
 295         struct obd_type *type;
 296 #endif
 297         int rc;
 298
 299         obd->obd_vars = lprocfs_lov_obd_vars;
 300 #if defined(CONFIG_PROC_FS) && defined(HAVE_SERVER_SUPPORT)
 301         /* If this is true then both client (lov) and server
 302          * (lod) are on the same node. The lod layer if loaded
 303          * first will register the lov proc directory. In that
 304          * case obd->obd_type->typ_procroot will be not set.
 305          * Instead we use type->typ_procsym as the parent.
 306          */
 307         type = class_search_type(LUSTRE_LOD_NAME);
 308         if (type && type->typ_procsym) {
 309                 obd->obd_proc_entry = lprocfs_register(obd->obd_name,
 310                                                        type->typ_procsym,
 311                                                        obd->obd_vars, obd);
 312                 if (IS_ERR(obd->obd_proc_entry)) {
 313                         rc = PTR_ERR(obd->obd_proc_entry);
 314                         CERROR("error %d setting up lprocfs for %s\n", rc,
 315                                obd->obd_name);
 316                         obd->obd_proc_entry = NULL;
 317                 }
 318         }
 319 #endif
 320         obd->obd_ktype.default_attrs = lov_attrs;
 321         rc = lprocfs_obd_setup(obd, false);
 322         if (rc)
 323                 GOTO(out, rc);
 324
 325 #ifdef CONFIG_PROC_FS
 326         rc = lprocfs_seq_create(obd->obd_proc_entry, "target_obd", 0444,
 327                                 &lov_proc_target_fops, obd);
 328         if (rc)
 329                 CWARN("%s: Error adding the target_obd file : rc %d\n",
 330                       obd->obd_name, rc);
 331
 332         lov->lov_pool_proc_entry = lprocfs_register("pools",
 333                                                     obd->obd_proc_entry,
 334                                                     NULL, NULL);
 335         if (IS_ERR(lov->lov_pool_proc_entry)) {
 336                 rc = PTR_ERR(lov->lov_pool_proc_entry);
 337                 CERROR("%s: error setting up debugfs for pools : rc %d\n",
 338                        obd->obd_name, rc);
 339                 lov->lov_pool_proc_entry = NULL;
 340         }
 341 #endif /* CONFIG_FS_PROC */
 342 out:
 343         return rc;
 344 }