lustre/lmv/lproc_lmv.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) 2004, 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
  32 #define DEBUG_SUBSYSTEM S_CLASS
  33
  34 #include <linux/seq_file.h>
  35 #include <linux/statfs.h>
  36 #include <lprocfs_status.h>
  37 #include <obd_class.h>
  38
  39 #include "lmv_internal.h"
  40
  41 static ssize_t numobd_show(struct kobject *kobj, struct attribute *attr,
  42                            char *buf)
  43 {
  44         struct obd_device *obd = container_of(kobj, struct obd_device,
  45                                               obd_kset.kobj);
  46
  47         return scnprintf(buf, PAGE_SIZE, "%u\n", obd->u.lmv.lmv_mdt_count);
  48 }
  49 LUSTRE_RO_ATTR(numobd);
  50
  51 static ssize_t activeobd_show(struct kobject *kobj, struct attribute *attr,
  52                               char *buf)
  53 {
  54         struct obd_device *obd = container_of(kobj, struct obd_device,
  55                                               obd_kset.kobj);
  56
  57         return scnprintf(buf, PAGE_SIZE, "%u\n",
  58                 obd->u.lmv.lmv_mdt_descs.ltd_lmv_desc.ld_active_tgt_count);
  59 }
  60 LUSTRE_RO_ATTR(activeobd);
  61
  62 static ssize_t desc_uuid_show(struct kobject *kobj, struct attribute *attr,
  63                               char *buf)
  64 {
  65         struct obd_device *obd = container_of(kobj, struct obd_device,
  66                                               obd_kset.kobj);
  67
  68         return scnprintf(buf, PAGE_SIZE, "%s\n",
  69                         obd->u.lmv.lmv_mdt_descs.ltd_lmv_desc.ld_uuid.uuid);
  70 }
  71 LUSTRE_RO_ATTR(desc_uuid);
  72
  73 static ssize_t qos_maxage_show(struct kobject *kobj,
  74                                struct attribute *attr,
  75                                char *buf)
  76 {
  77         struct obd_device *obd = container_of(kobj, struct obd_device,
  78                                               obd_kset.kobj);
  79
  80         return scnprintf(buf, PAGE_SIZE, "%u\n",
  81                         obd->u.lmv.lmv_mdt_descs.ltd_lmv_desc.ld_qos_maxage);
  82 }
  83
  84 static ssize_t qos_maxage_store(struct kobject *kobj,
  85                                 struct attribute *attr,
  86                                 const char *buffer,
  87                                 size_t count)
  88 {
  89         struct obd_device *obd = container_of(kobj, struct obd_device,
  90                                               obd_kset.kobj);
  91         unsigned int val;
  92         int rc;
  93
  94         rc = kstrtouint(buffer, 0, &val);
  95         if (rc)
  96                 return rc;
  97
  98         obd->u.lmv.lmv_mdt_descs.ltd_lmv_desc.ld_qos_maxage = val;
  99
 100         return count;
 101 }
 102 LUSTRE_RW_ATTR(qos_maxage);
 103
 104 static ssize_t qos_prio_free_show(struct kobject *kobj,
 105                                   struct attribute *attr,
 106                                   char *buf)
 107 {
 108         struct obd_device *obd = container_of(kobj, struct obd_device,
 109                                               obd_kset.kobj);
 110
 111         return scnprintf(buf, PAGE_SIZE, "%u%%\n",
 112                         (obd->u.lmv.lmv_qos.lq_prio_free * 100 + 255) >> 8);
 113 }
 114
 115 static ssize_t qos_prio_free_store(struct kobject *kobj,
 116                                    struct attribute *attr,
 117                                    const char *buffer,
 118                                    size_t count)
 119 {
 120         struct obd_device *obd = container_of(kobj, struct obd_device,
 121                                               obd_kset.kobj);
 122         struct lmv_obd *lmv = &obd->u.lmv;
 123         char buf[6], *tmp;
 124         unsigned int val;
 125         int rc;
 126
 127         /* "100%\n\0" should be largest string */
 128         if (count >= sizeof(buf))
 129                 return -ERANGE;
 130
 131         strncpy(buf, buffer, sizeof(buf));
 132         buf[sizeof(buf) - 1] = '\0';
 133         tmp = strchr(buf, '%');
 134         if (tmp)
 135                 *tmp = '\0';
 136
 137         rc = kstrtouint(buf, 0, &val);
 138         if (rc)
 139                 return rc;
 140
 141         if (val > 100)
 142                 return -EINVAL;
 143
 144         lmv->lmv_qos.lq_prio_free = (val << 8) / 100;
 145         set_bit(LQ_DIRTY, &lmv->lmv_qos.lq_flags);
 146         set_bit(LQ_RESET, &lmv->lmv_qos.lq_flags);
 147
 148         return count;
 149 }
 150 LUSTRE_RW_ATTR(qos_prio_free);
 151
 152 static ssize_t qos_threshold_rr_show(struct kobject *kobj,
 153                                      struct attribute *attr,
 154                                      char *buf)
 155 {
 156         struct obd_device *obd = container_of(kobj, struct obd_device,
 157                                               obd_kset.kobj);
 158
 159         return scnprintf(buf, PAGE_SIZE, "%u%%\n",
 160                         (obd->u.lmv.lmv_qos.lq_threshold_rr * 100 + 255) >> 8);
 161 }
 162
 163 static ssize_t qos_threshold_rr_store(struct kobject *kobj,
 164                                       struct attribute *attr,
 165                                       const char *buffer,
 166                                       size_t count)
 167 {
 168         struct obd_device *obd = container_of(kobj, struct obd_device,
 169                                               obd_kset.kobj);
 170         struct lmv_obd *lmv = &obd->u.lmv;
 171         char buf[6], *tmp;
 172         unsigned int val;
 173         int rc;
 174
 175         /* "100%\n\0" should be largest string */
 176         if (count >= sizeof(buf))
 177                 return -ERANGE;
 178
 179         strncpy(buf, buffer, sizeof(buf));
 180         buf[sizeof(buf) - 1] = '\0';
 181         tmp = strchr(buf, '%');
 182         if (tmp)
 183                 *tmp = '\0';
 184
 185         rc = kstrtouint(buf, 0, &val);
 186         if (rc)
 187                 return rc;
 188
 189         if (val > 100)
 190                 return -EINVAL;
 191
 192         lmv->lmv_qos.lq_threshold_rr = (val << 8) / 100;
 193         set_bit(LQ_DIRTY, &lmv->lmv_qos.lq_flags);
 194
 195         return count;
 196 }
 197 LUSTRE_RW_ATTR(qos_threshold_rr);
 198
 199 #ifdef CONFIG_PROC_FS
 200 static void *lmv_tgt_seq_start(struct seq_file *p, loff_t *pos)
 201 {
 202         struct obd_device *obd = p->private;
 203         struct lmv_obd *lmv = &obd->u.lmv;
 204         struct lu_tgt_desc *tgt;
 205
 206         while (*pos < lmv->lmv_mdt_descs.ltd_tgts_size) {
 207                 tgt = lmv_tgt(lmv, (__u32)*pos);
 208                 if (tgt)
 209                         return tgt;
 210
 211                 ++*pos;
 212         }
 213
 214         return NULL;
 215 }
 216
 217 static void lmv_tgt_seq_stop(struct seq_file *p, void *v)
 218 {
 219 }
 220
 221 static void *lmv_tgt_seq_next(struct seq_file *p, void *v, loff_t *pos)
 222 {
 223         struct obd_device *obd = p->private;
 224         struct lmv_obd *lmv = &obd->u.lmv;
 225         struct lu_tgt_desc *tgt;
 226
 227         ++*pos;
 228         while (*pos < lmv->lmv_mdt_descs.ltd_tgts_size) {
 229                 tgt = lmv_tgt(lmv, (__u32)*pos);
 230                 if (tgt)
 231                         return tgt;
 232
 233                 ++*pos;
 234         }
 235
 236         return NULL;
 237 }
 238
 239 static int lmv_tgt_seq_show(struct seq_file *p, void *v)
 240 {
 241         struct lmv_tgt_desc     *tgt = v;
 242
 243         if (!tgt)
 244                 return 0;
 245
 246         seq_printf(p, "%u: %s %sACTIVE\n",
 247                    tgt->ltd_index, tgt->ltd_uuid.uuid,
 248                    tgt->ltd_active ? "" : "IN");
 249         return 0;
 250 }
 251
 252 static const struct seq_operations lmv_tgt_sops = {
 253         .start                 = lmv_tgt_seq_start,
 254         .stop                  = lmv_tgt_seq_stop,
 255         .next                  = lmv_tgt_seq_next,
 256         .show                  = lmv_tgt_seq_show,
 257 };
 258
 259 static int lmv_target_seq_open(struct inode *inode, struct file *file)
 260 {
 261         struct seq_file         *seq;
 262         int                     rc;
 263
 264         rc = seq_open(file, &lmv_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 static const struct proc_ops lmv_proc_target_fops = {
 274         PROC_OWNER(THIS_MODULE)
 275         .proc_open      = lmv_target_seq_open,
 276         .proc_read      = seq_read,
 277         .proc_lseek     = seq_lseek,
 278         .proc_release   = seq_release,
 279 };
 280 #endif /* CONFIG_PROC_FS */
 281
 282 static struct attribute *lmv_attrs[] = {
 283         &lustre_attr_activeobd.attr,
 284         &lustre_attr_desc_uuid.attr,
 285         &lustre_attr_numobd.attr,
 286         &lustre_attr_qos_maxage.attr,
 287         &lustre_attr_qos_prio_free.attr,
 288         &lustre_attr_qos_threshold_rr.attr,
 289         NULL,
 290 };
 291
 292 int lmv_tunables_init(struct obd_device *obd)
 293 {
 294         int rc;
 295
 296         obd->obd_ktype.default_attrs = lmv_attrs;
 297         rc = lprocfs_obd_setup(obd, true);
 298         if (rc)
 299                 goto out_failed;
 300 #ifdef CONFIG_PROC_FS
 301         rc = lprocfs_alloc_md_stats(obd, 0);
 302         if (rc) {
 303                 lprocfs_obd_cleanup(obd);
 304                 goto out_failed;
 305         }
 306
 307         rc = lprocfs_seq_create(obd->obd_proc_entry, "target_obd",
 308                                 0444, &lmv_proc_target_fops, obd);
 309         if (rc) {
 310                 lprocfs_free_md_stats(obd);
 311                 lprocfs_obd_cleanup(obd);
 312                 CWARN("%s: error adding LMV target_obd file: rc = %d\n",
 313                       obd->obd_name, rc);
 314                 rc = 0;
 315         }
 316 #endif /* CONFIG_PROC_FS */
 317 out_failed:
 318         return rc;
 319 }