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         char kernbuf[22] = "";
  60         u64 val;
  61         int rc;
  62
  63         LASSERT(dev != NULL);
  64         desc = &dev->u.lov.desc;
  65
  66         if (count >= sizeof(kernbuf))
  67                 return -EINVAL;
  68
  69         if (copy_from_user(kernbuf, buffer, count))
  70                 return -EFAULT;
  71         kernbuf[count] = 0;
  72
  73         rc = sysfs_memparse(kernbuf, count, &val, "B");
  74         if (rc < 0)
  75                 return rc;
  76
  77         lov_fix_desc_stripe_size(&val);
  78         desc->ld_default_stripe_size = val;
  79
  80         return count;
  81 }
  82 LPROC_SEQ_FOPS(lov_stripesize);
  83
  84 static ssize_t stripeoffset_show(struct kobject *kobj, struct attribute *attr,
  85                                  char *buf)
  86 {
  87         struct obd_device *dev = container_of(kobj, struct obd_device,
  88                                               obd_kset.kobj);
  89         struct lov_desc *desc = &dev->u.lov.desc;
  90
  91         return sprintf(buf, "%lld\n", desc->ld_default_stripe_offset);
  92 }
  93
  94 static ssize_t stripeoffset_store(struct kobject *kobj, struct attribute *attr,
  95                                   const char *buf, size_t count)
  96 {
  97         struct obd_device *dev = container_of(kobj, struct obd_device,
  98                                               obd_kset.kobj);
  99         struct lov_desc *desc = &dev->u.lov.desc;
 100         long val;
 101         int rc;
 102
 103         rc = kstrtol(buf, 0, &val);
 104         if (rc)
 105                 return rc;
 106         if (val < -1 || val > LOV_MAX_STRIPE_COUNT)
 107                 return -ERANGE;
 108
 109         desc->ld_default_stripe_offset = val;
 110
 111         return count;
 112 }
 113 LUSTRE_RW_ATTR(stripeoffset);
 114
 115 static ssize_t stripetype_show(struct kobject *kobj, struct attribute *attr,
 116                                char *buf)
 117 {
 118         struct obd_device *dev = container_of(kobj, struct obd_device,
 119                                               obd_kset.kobj);
 120         struct lov_desc *desc = &dev->u.lov.desc;
 121
 122         return sprintf(buf, "%u\n", desc->ld_pattern);
 123 }
 124
 125 static ssize_t stripetype_store(struct kobject *kobj, struct attribute *attr,
 126                                 const char *buffer, size_t count)
 127 {
 128         struct obd_device *dev = container_of(kobj, struct obd_device,
 129                                               obd_kset.kobj);
 130         struct lov_desc *desc = &dev->u.lov.desc;
 131         u32 pattern;
 132         int rc;
 133
 134         rc = kstrtouint(buffer, 0, &pattern);
 135         if (rc)
 136                 return rc;
 137
 138         lov_fix_desc_pattern(&pattern);
 139         desc->ld_pattern = pattern;
 140
 141         return count;
 142 }
 143 LUSTRE_RW_ATTR(stripetype);
 144
 145 static ssize_t stripecount_show(struct kobject *kobj, struct attribute *attr,
 146                                 char *buf)
 147 {
 148         struct obd_device *dev = container_of(kobj, struct obd_device,
 149                                               obd_kset.kobj);
 150         struct lov_desc *desc = &dev->u.lov.desc;
 151
 152         return sprintf(buf, "%d\n",
 153                        (__s16)(desc->ld_default_stripe_count + 1) - 1);
 154 }
 155
 156 static ssize_t stripecount_store(struct kobject *kobj, struct attribute *attr,
 157                                  const char *buffer, size_t count)
 158 {
 159         struct obd_device *dev = container_of(kobj, struct obd_device,
 160                                               obd_kset.kobj);
 161         struct lov_desc *desc = &dev->u.lov.desc;
 162         int stripe_count;
 163         int rc;
 164
 165         rc = kstrtoint(buffer, 0, &stripe_count);
 166         if (rc)
 167                 return rc;
 168
 169         if (stripe_count < -1)
 170                 return -ERANGE;
 171
 172         lov_fix_desc_stripe_count(&stripe_count);
 173         desc->ld_default_stripe_count = stripe_count;
 174
 175         return count;
 176 }
 177 LUSTRE_RW_ATTR(stripecount);
 178
 179 static ssize_t numobd_show(struct kobject *kobj, struct attribute *attr,
 180                            char *buf)
 181 {
 182         struct obd_device *dev = container_of(kobj, struct obd_device,
 183                                               obd_kset.kobj);
 184         struct lov_desc *desc = &dev->u.lov.desc;
 185
 186         return sprintf(buf, "%u\n", desc->ld_tgt_count);
 187 }
 188 LUSTRE_RO_ATTR(numobd);
 189
 190 static ssize_t activeobd_show(struct kobject *kobj, struct attribute *attr,
 191                               char *buf)
 192 {
 193         struct obd_device *dev = container_of(kobj, struct obd_device,
 194                                               obd_kset.kobj);
 195         struct lov_desc *desc = &dev->u.lov.desc;
 196
 197         return sprintf(buf, "%u\n", desc->ld_active_tgt_count);
 198 }
 199 LUSTRE_RO_ATTR(activeobd);
 200
 201 static ssize_t desc_uuid_show(struct kobject *kobj, struct attribute *attr,
 202                               char *buf)
 203 {
 204         struct obd_device *dev = container_of(kobj, struct obd_device,
 205                                               obd_kset.kobj);
 206         struct lov_desc *desc = &dev->u.lov.desc;
 207
 208         return sprintf(buf, "%s\n", desc->ld_uuid.uuid);
 209 }
 210 LUSTRE_RO_ATTR(desc_uuid);
 211
 212 #ifdef CONFIG_PROC_FS
 213 static void *lov_tgt_seq_start(struct seq_file *p, loff_t *pos)
 214 {
 215         struct obd_device *dev = p->private;
 216         struct lov_obd *lov = &dev->u.lov;
 217
 218         while (*pos < lov->desc.ld_tgt_count) {
 219                 if (lov->lov_tgts[*pos])
 220                         return lov->lov_tgts[*pos];
 221                 ++*pos;
 222         }
 223         return NULL;
 224 }
 225
 226 static void lov_tgt_seq_stop(struct seq_file *p, void *v)
 227 {
 228 }
 229
 230 static void *lov_tgt_seq_next(struct seq_file *p, void *v, loff_t *pos)
 231 {
 232         struct obd_device *dev = p->private;
 233         struct lov_obd *lov = &dev->u.lov;
 234
 235         while (++*pos < lov->desc.ld_tgt_count) {
 236                 if (lov->lov_tgts[*pos])
 237                         return lov->lov_tgts[*pos];
 238         }
 239         return NULL;
 240 }
 241
 242 static int lov_tgt_seq_show(struct seq_file *p, void *v)
 243 {
 244         struct lov_tgt_desc *tgt = v;
 245
 246         seq_printf(p, "%d: %s %sACTIVE\n", tgt->ltd_index,
 247                    obd_uuid2str(&tgt->ltd_uuid),
 248                    tgt->ltd_active ? "" : "IN");
 249         return 0;
 250 }
 251
 252 static const struct seq_operations lov_tgt_sops = {
 253         .start = lov_tgt_seq_start,
 254         .stop = lov_tgt_seq_stop,
 255         .next = lov_tgt_seq_next,
 256         .show = lov_tgt_seq_show,
 257 };
 258
 259 static int lov_target_seq_open(struct inode *inode, struct file *file)
 260 {
 261         struct seq_file *seq;
 262         int rc;
 263
 264         rc = seq_open(file, &lov_tgt_sops);
 265         if (rc)
 266                 return rc;
 267
 268         seq = file->private_data;
 269         seq->private = PDE_DATA(inode);
 270         return 0;
 271 }
 272
 273 struct lprocfs_vars lprocfs_lov_obd_vars[] = {
 274         { .name =       "stripesize",
 275           .fops =       &lov_stripesize_fops    },
 276         { NULL }
 277 };
 278
 279 const struct file_operations lov_proc_target_fops = {
 280         .owner   = THIS_MODULE,
 281         .open    = lov_target_seq_open,
 282         .read    = seq_read,
 283         .llseek  = seq_lseek,
 284         .release = lprocfs_seq_release,
 285 };
 286 #endif /* CONFIG_PROC_FS */
 287
 288 static struct attribute *lov_attrs[] = {
 289         &lustre_attr_activeobd.attr,
 290         &lustre_attr_numobd.attr,
 291         &lustre_attr_desc_uuid.attr,
 292         &lustre_attr_stripeoffset.attr,
 293         &lustre_attr_stripetype.attr,
 294         &lustre_attr_stripecount.attr,
 295         NULL,
 296 };
 297
 298 int lov_tunables_init(struct obd_device *obd)
 299 {
 300         struct lov_obd *lov = &obd->u.lov;
 301         int rc;
 302
 303         obd->obd_vars = lprocfs_lov_obd_vars;
 304         obd->obd_ktype.default_attrs = lov_attrs;
 305         rc = lprocfs_obd_setup(obd, false);
 306         if (rc)
 307                 GOTO(out, rc);
 308
 309 #ifdef CONFIG_PROC_FS
 310         rc = lprocfs_seq_create(obd->obd_proc_entry, "target_obd", 0444,
 311                                 &lov_proc_target_fops, obd);
 312         if (rc)
 313                 CWARN("%s: Error adding the target_obd file : rc %d\n",
 314                       obd->obd_name, rc);
 315
 316         lov->lov_pool_proc_entry = lprocfs_register("pools",
 317                                                     obd->obd_proc_entry,
 318                                                     NULL, NULL);
 319         if (IS_ERR(lov->lov_pool_proc_entry)) {
 320                 rc = PTR_ERR(lov->lov_pool_proc_entry);
 321                 CERROR("%s: error setting up debugfs for pools : rc %d\n",
 322                        obd->obd_name, rc);
 323                 lov->lov_pool_proc_entry = NULL;
 324         }
 325 #endif /* CONFIG_FS_PROC */
 326 out:
 327         return rc;
 328 }