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  */
  31 #define DEBUG_SUBSYSTEM S_CLASS
  32
  33 #include <linux/version.h>
  34 #include <asm/statfs.h>
  35 #include <lprocfs_status.h>
  36 #include <obd_class.h>
  37 #include <uapi/linux/lustre/lustre_param.h>
  38 #include "lov_internal.h"
  39
  40 static ssize_t stripesize_show(struct kobject *kobj, struct attribute *attr,
  41                                char *buf)
  42 {
  43         struct obd_device *obd = container_of(kobj, struct obd_device,
  44                                               obd_kset.kobj);
  45         struct lov_desc *desc = &obd->u.lov.desc;
  46
  47         return scnprintf(buf, PAGE_SIZE, "%llu\n", desc->ld_default_stripe_size);
  48 }
  49
  50 static ssize_t stripesize_store(struct kobject *kobj, struct attribute *attr,
  51                                 const char *buf, size_t count)
  52 {
  53         struct obd_device *obd = container_of(kobj, struct obd_device,
  54                                               obd_kset.kobj);
  55         struct lov_desc *desc = &obd->u.lov.desc;
  56         u64 val;
  57         int rc;
  58
  59         rc = sysfs_memparse(buf, count, &val, "B");
  60         if (rc < 0)
  61                 return rc;
  62
  63         lov_fix_desc_stripe_size(&val);
  64         desc->ld_default_stripe_size = val;
  65
  66         return count;
  67 }
  68 LUSTRE_RW_ATTR(stripesize);
  69
  70 static ssize_t stripeoffset_show(struct kobject *kobj, struct attribute *attr,
  71                                  char *buf)
  72 {
  73         struct obd_device *obd = container_of(kobj, struct obd_device,
  74                                               obd_kset.kobj);
  75         struct lov_desc *desc = &obd->u.lov.desc;
  76
  77         return sprintf(buf, "%lld\n", desc->ld_default_stripe_offset);
  78 }
  79
  80 static ssize_t stripeoffset_store(struct kobject *kobj, struct attribute *attr,
  81                                   const char *buf, size_t count)
  82 {
  83         struct obd_device *obd = container_of(kobj, struct obd_device,
  84                                               obd_kset.kobj);
  85         struct lov_desc *desc = &obd->u.lov.desc;
  86         long val;
  87         int rc;
  88
  89         rc = kstrtol(buf, 0, &val);
  90         if (rc)
  91                 return rc;
  92         if (val < -1 || val > LOV_MAX_STRIPE_COUNT)
  93                 return -ERANGE;
  94
  95         desc->ld_default_stripe_offset = val;
  96
  97         return count;
  98 }
  99 LUSTRE_RW_ATTR(stripeoffset);
 100
 101 static ssize_t stripetype_show(struct kobject *kobj, struct attribute *attr,
 102                                char *buf)
 103 {
 104         struct obd_device *obd = container_of(kobj, struct obd_device,
 105                                               obd_kset.kobj);
 106         struct lov_desc *desc = &obd->u.lov.desc;
 107
 108         return sprintf(buf, "%u\n", desc->ld_pattern);
 109 }
 110
 111 static ssize_t stripetype_store(struct kobject *kobj, struct attribute *attr,
 112                                 const char *buffer, size_t count)
 113 {
 114         struct obd_device *obd = container_of(kobj, struct obd_device,
 115                                               obd_kset.kobj);
 116         struct lov_desc *desc = &obd->u.lov.desc;
 117         u32 pattern;
 118         int rc;
 119
 120         rc = kstrtouint(buffer, 0, &pattern);
 121         if (rc)
 122                 return rc;
 123
 124         lov_fix_desc_pattern(&pattern);
 125         desc->ld_pattern = pattern;
 126
 127         return count;
 128 }
 129 LUSTRE_RW_ATTR(stripetype);
 130
 131 static ssize_t stripecount_show(struct kobject *kobj, struct attribute *attr,
 132                                 char *buf)
 133 {
 134         struct obd_device *obd = container_of(kobj, struct obd_device,
 135                                               obd_kset.kobj);
 136         struct lov_desc *desc = &obd->u.lov.desc;
 137
 138         return sprintf(buf, "%d\n",
 139                        (__s16)(desc->ld_default_stripe_count + 1) - 1);
 140 }
 141
 142 static ssize_t stripecount_store(struct kobject *kobj, struct attribute *attr,
 143                                  const char *buffer, size_t count)
 144 {
 145         struct obd_device *obd = container_of(kobj, struct obd_device,
 146                                               obd_kset.kobj);
 147         struct lov_desc *desc = &obd->u.lov.desc;
 148         int stripe_count;
 149         int rc;
 150
 151         rc = kstrtoint(buffer, 0, &stripe_count);
 152         if (rc)
 153                 return rc;
 154
 155         if (stripe_count < -1)
 156                 return -ERANGE;
 157
 158         lov_fix_desc_stripe_count(&stripe_count);
 159         desc->ld_default_stripe_count = stripe_count;
 160
 161         return count;
 162 }
 163 LUSTRE_RW_ATTR(stripecount);
 164
 165 static ssize_t numobd_show(struct kobject *kobj, struct attribute *attr,
 166                            char *buf)
 167 {
 168         struct obd_device *obd = container_of(kobj, struct obd_device,
 169                                               obd_kset.kobj);
 170         struct lov_desc *desc = &obd->u.lov.desc;
 171
 172         return sprintf(buf, "%u\n", desc->ld_tgt_count);
 173 }
 174 LUSTRE_RO_ATTR(numobd);
 175
 176 static ssize_t activeobd_show(struct kobject *kobj, struct attribute *attr,
 177                               char *buf)
 178 {
 179         struct obd_device *obd = container_of(kobj, struct obd_device,
 180                                               obd_kset.kobj);
 181         struct lov_desc *desc = &obd->u.lov.desc;
 182
 183         return sprintf(buf, "%u\n", desc->ld_active_tgt_count);
 184 }
 185 LUSTRE_RO_ATTR(activeobd);
 186
 187 static ssize_t desc_uuid_show(struct kobject *kobj, struct attribute *attr,
 188                               char *buf)
 189 {
 190         struct obd_device *obd = container_of(kobj, struct obd_device,
 191                                               obd_kset.kobj);
 192         struct lov_desc *desc = &obd->u.lov.desc;
 193
 194         return sprintf(buf, "%s\n", desc->ld_uuid.uuid);
 195 }
 196 LUSTRE_RO_ATTR(desc_uuid);
 197
 198 #ifdef CONFIG_PROC_FS
 199 static void *lov_tgt_seq_start(struct seq_file *p, loff_t *pos)
 200 {
 201         struct obd_device *obd = p->private;
 202         struct lov_obd *lov = &obd->u.lov;
 203
 204         while (*pos < lov->desc.ld_tgt_count) {
 205                 if (lov->lov_tgts[*pos])
 206                         return lov->lov_tgts[*pos];
 207                 ++*pos;
 208         }
 209         return NULL;
 210 }
 211
 212 static void lov_tgt_seq_stop(struct seq_file *p, void *v)
 213 {
 214 }
 215
 216 static void *lov_tgt_seq_next(struct seq_file *p, void *v, loff_t *pos)
 217 {
 218         struct obd_device *obd = p->private;
 219         struct lov_obd *lov = &obd->u.lov;
 220
 221         while (++*pos < lov->desc.ld_tgt_count) {
 222                 if (lov->lov_tgts[*pos])
 223                         return lov->lov_tgts[*pos];
 224         }
 225         return NULL;
 226 }
 227
 228 static int lov_tgt_seq_show(struct seq_file *p, void *v)
 229 {
 230         struct lov_tgt_desc *tgt = v;
 231
 232         seq_printf(p, "%d: %s %sACTIVE\n", tgt->ltd_index,
 233                    obd_uuid2str(&tgt->ltd_uuid),
 234                    tgt->ltd_active ? "" : "IN");
 235         return 0;
 236 }
 237
 238 static const struct seq_operations lov_tgt_sops = {
 239         .start = lov_tgt_seq_start,
 240         .stop = lov_tgt_seq_stop,
 241         .next = lov_tgt_seq_next,
 242         .show = lov_tgt_seq_show,
 243 };
 244
 245 static int lov_target_seq_open(struct inode *inode, struct file *file)
 246 {
 247         struct seq_file *seq;
 248         int rc;
 249
 250         rc = seq_open(file, &lov_tgt_sops);
 251         if (rc)
 252                 return rc;
 253
 254         seq = file->private_data;
 255         seq->private = pde_data(inode);
 256         return 0;
 257 }
 258
 259 static const struct proc_ops lov_proc_target_fops = {
 260         PROC_OWNER(THIS_MODULE)
 261         .proc_open      = lov_target_seq_open,
 262         .proc_read      = seq_read,
 263         .proc_lseek     = seq_lseek,
 264         .proc_release   = lprocfs_seq_release,
 265 };
 266 #endif /* CONFIG_PROC_FS */
 267
 268 static struct attribute *lov_attrs[] = {
 269         &lustre_attr_activeobd.attr,
 270         &lustre_attr_numobd.attr,
 271         &lustre_attr_desc_uuid.attr,
 272         &lustre_attr_stripesize.attr,
 273         &lustre_attr_stripeoffset.attr,
 274         &lustre_attr_stripetype.attr,
 275         &lustre_attr_stripecount.attr,
 276         NULL,
 277 };
 278
 279 KOBJ_ATTRIBUTE_GROUPS(lov); /* creates lov_groups */
 280
 281 int lov_tunables_init(struct obd_device *obd)
 282 {
 283         struct lov_obd *lov = &obd->u.lov;
 284         int rc;
 285
 286         obd->obd_ktype.default_groups = KOBJ_ATTR_GROUPS(lov);
 287         rc = lprocfs_obd_setup(obd, false);
 288         if (rc)
 289                 GOTO(out, rc);
 290
 291 #ifdef CONFIG_PROC_FS
 292         rc = lprocfs_seq_create(obd->obd_proc_entry, "target_obd", 0444,
 293                                 &lov_proc_target_fops, obd);
 294         if (rc)
 295                 CWARN("%s: Error adding the target_obd file : rc %d\n",
 296                       obd->obd_name, rc);
 297
 298         lov->lov_pool_proc_entry = lprocfs_register("pools",
 299                                                     obd->obd_proc_entry,
 300                                                     NULL, NULL);
 301         if (IS_ERR(lov->lov_pool_proc_entry)) {
 302                 rc = PTR_ERR(lov->lov_pool_proc_entry);
 303                 CERROR("%s: error setting up debugfs for pools : rc %d\n",
 304                        obd->obd_name, rc);
 305                 lov->lov_pool_proc_entry = NULL;
 306         }
 307 #endif /* CONFIG_FS_PROC */
 308 out:
 309         return rc;
 310 }