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 +
 161                         (QOS_THRESHOLD_MAX - 1)) / QOS_THRESHOLD_MAX);
 162 }
 163
 164 static ssize_t qos_threshold_rr_store(struct kobject *kobj,
 165                                       struct attribute *attr,
 166                                       const char *buffer,
 167                                       size_t count)
 168 {
 169         struct obd_device *obd = container_of(kobj, struct obd_device,
 170                                               obd_kset.kobj);
 171         struct lmv_obd *lmv = &obd->u.lmv;
 172         char buf[6], *tmp;
 173         unsigned int val;
 174         int rc;
 175
 176         /* "100%\n\0" should be largest string */
 177         if (count >= sizeof(buf))
 178                 return -ERANGE;
 179
 180         strncpy(buf, buffer, sizeof(buf));
 181         buf[sizeof(buf) - 1] = '\0';
 182         tmp = strchr(buf, '%');
 183         if (tmp)
 184                 *tmp = '\0';
 185
 186         rc = kstrtouint(buf, 0, &val);
 187         if (rc)
 188                 return rc;
 189
 190         if (val > 100)
 191                 return -EINVAL;
 192
 193         lmv->lmv_qos.lq_threshold_rr = (val * QOS_THRESHOLD_MAX) / 100;
 194         set_bit(LQ_DIRTY, &lmv->lmv_qos.lq_flags);
 195
 196         return count;
 197 }
 198 LUSTRE_RW_ATTR(qos_threshold_rr);
 199
 200 #ifdef CONFIG_PROC_FS
 201 static void *lmv_tgt_seq_start(struct seq_file *p, loff_t *pos)
 202 {
 203         struct obd_device *obd = p->private;
 204         struct lmv_obd *lmv = &obd->u.lmv;
 205         struct lu_tgt_desc *tgt;
 206
 207         while (*pos < lmv->lmv_mdt_descs.ltd_tgts_size) {
 208                 tgt = lmv_tgt(lmv, (__u32)*pos);
 209                 if (tgt)
 210                         return tgt;
 211
 212                 ++*pos;
 213         }
 214
 215         return NULL;
 216 }
 217
 218 static void lmv_tgt_seq_stop(struct seq_file *p, void *v)
 219 {
 220 }
 221
 222 static void *lmv_tgt_seq_next(struct seq_file *p, void *v, loff_t *pos)
 223 {
 224         struct obd_device *obd = p->private;
 225         struct lmv_obd *lmv = &obd->u.lmv;
 226         struct lu_tgt_desc *tgt;
 227
 228         ++*pos;
 229         while (*pos < lmv->lmv_mdt_descs.ltd_tgts_size) {
 230                 tgt = lmv_tgt(lmv, (__u32)*pos);
 231                 if (tgt)
 232                         return tgt;
 233
 234                 ++*pos;
 235         }
 236
 237         return NULL;
 238 }
 239
 240 static int lmv_tgt_seq_show(struct seq_file *p, void *v)
 241 {
 242         struct lmv_tgt_desc     *tgt = v;
 243
 244         if (!tgt)
 245                 return 0;
 246
 247         seq_printf(p, "%u: %s %sACTIVE\n",
 248                    tgt->ltd_index, tgt->ltd_uuid.uuid,
 249                    tgt->ltd_active ? "" : "IN");
 250         return 0;
 251 }
 252
 253 static const struct seq_operations lmv_tgt_sops = {
 254         .start                 = lmv_tgt_seq_start,
 255         .stop                  = lmv_tgt_seq_stop,
 256         .next                  = lmv_tgt_seq_next,
 257         .show                  = lmv_tgt_seq_show,
 258 };
 259
 260 static int lmv_target_seq_open(struct inode *inode, struct file *file)
 261 {
 262         struct seq_file         *seq;
 263         int                     rc;
 264
 265         rc = seq_open(file, &lmv_tgt_sops);
 266         if (rc)
 267                 return rc;
 268
 269         seq = file->private_data;
 270         seq->private = PDE_DATA(inode);
 271         return 0;
 272 }
 273
 274 static const struct proc_ops lmv_proc_target_fops = {
 275         PROC_OWNER(THIS_MODULE)
 276         .proc_open      = lmv_target_seq_open,
 277         .proc_read      = seq_read,
 278         .proc_lseek     = seq_lseek,
 279         .proc_release   = seq_release,
 280 };
 281 #endif /* CONFIG_PROC_FS */
 282
 283 static struct attribute *lmv_attrs[] = {
 284         &lustre_attr_activeobd.attr,
 285         &lustre_attr_desc_uuid.attr,
 286         &lustre_attr_numobd.attr,
 287         &lustre_attr_qos_maxage.attr,
 288         &lustre_attr_qos_prio_free.attr,
 289         &lustre_attr_qos_threshold_rr.attr,
 290         NULL,
 291 };
 292
 293 int lmv_tunables_init(struct obd_device *obd)
 294 {
 295         int rc;
 296
 297         obd->obd_ktype.default_attrs = lmv_attrs;
 298         rc = lprocfs_obd_setup(obd, true);
 299         if (rc)
 300                 goto out_failed;
 301 #ifdef CONFIG_PROC_FS
 302         rc = lprocfs_alloc_md_stats(obd, 0);
 303         if (rc) {
 304                 lprocfs_obd_cleanup(obd);
 305                 goto out_failed;
 306         }
 307
 308         rc = lprocfs_seq_create(obd->obd_proc_entry, "target_obd",
 309                                 0444, &lmv_proc_target_fops, obd);
 310         if (rc) {
 311                 lprocfs_free_md_stats(obd);
 312                 lprocfs_obd_cleanup(obd);
 313                 CWARN("%s: error adding LMV target_obd file: rc = %d\n",
 314                       obd->obd_name, rc);
 315                 rc = 0;
 316         }
 317 #endif /* CONFIG_PROC_FS */
 318 out_failed:
 319         return rc;
 320 }