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LU-12624 lod: alloc dir stripes by QoS
[fs/lustre-release.git] / lustre / lod / lproc_lod.c
index 80c6d44..8297ae3 100644 (file)
 #ifdef CONFIG_PROC_FS
 
 /**
- * Show default stripe size.
- *
- * \param[in] m                seq file
- * \param[in] v                unused for single entry
- *
- * \retval 0           on success
- * \retval negative    error code if failed
+ * Show DoM default stripe size.
  */
-static int lod_dom_stripesize_seq_show(struct seq_file *m, void *v)
+static ssize_t dom_stripesize_show(struct kobject *kobj, struct attribute *attr,
+                                  char *buf)
 {
-       struct obd_device *dev = m->private;
-       struct lod_device *lod;
+       struct dt_device *dt = container_of(kobj, struct dt_device,
+                                           dd_kobj);
+       struct lod_device *lod = dt2lod_dev(dt);
 
-       LASSERT(dev != NULL);
-       lod = lu2lod_dev(dev->obd_lu_dev);
-       seq_printf(m, "%u\n", lod->lod_dom_max_stripesize);
-       return 0;
+       return snprintf(buf, PAGE_SIZE, "%u\n", lod->lod_dom_max_stripesize);
 }
 
 /**
- * Set default stripe size.
- *
- * \param[in] file     proc file
- * \param[in] buffer   string containing the maximum number of bytes stored in
- *                     each object before moving to the next object in the
- *                     layout (if any)
- * \param[in] count    @buffer length
- * \param[in] off      unused for single entry
- *
- * \retval @count      on success
- * \retval negative    error code if failed
+ * Set DoM default stripe size.
  */
-static ssize_t
-lod_dom_stripesize_seq_write(struct file *file, const char __user *buffer,
-                             size_t count, loff_t *off)
+static ssize_t dom_stripesize_store(struct kobject *kobj,
+                                   struct attribute *attr, const char *buffer,
+                                   size_t count)
 {
-       struct seq_file *m = file->private_data;
-       struct obd_device *dev = m->private;
-       struct lod_device *lod;
+       struct dt_device *dt = container_of(kobj, struct dt_device,
+                                           dd_kobj);
+       struct lod_device *lod = dt2lod_dev(dt);
+       char tbuf[22] = "";
        s64 val;
        int rc;
 
-       LASSERT(dev != NULL);
-       lod = lu2lod_dev(dev->obd_lu_dev);
-       rc = lprocfs_str_with_units_to_s64(buffer, count, &val, '1');
+       if (count > (sizeof(tbuf) - 1))
+               return -EINVAL;
+
+       memcpy(tbuf, buffer, count);
+
+       rc = lu_str_to_s64(tbuf, count, &val, '1');
        if (rc)
                return rc;
+
        if (val < 0)
                return -ERANGE;
 
        /* 1GB is the limit */
        if (val > (1ULL << 30))
                return -ERANGE;
-       else if (val > 0) {
+
+       if (val > 0) {
                if (val < LOV_MIN_STRIPE_SIZE) {
                        LCONSOLE_INFO("Increasing provided stripe size to "
                                      "a minimum value %u\n",
@@ -117,75 +106,52 @@ lod_dom_stripesize_seq_write(struct file *file, const char __user *buffer,
 
        return count;
 }
-LPROC_SEQ_FOPS(lod_dom_stripesize);
 
-/**
- * Show default stripe size.
- *
- * \param[in] m                seq file
- * \param[in] v                unused for single entry
- *
- * \retval 0           on success
- * \retval negative    error code if failed
- */
-static int lod_stripesize_seq_show(struct seq_file *m, void *v)
+LUSTRE_RW_ATTR(dom_stripesize);
+
+static ssize_t stripesize_show(struct kobject *kobj, struct attribute *attr,
+                              char *buf)
 {
-       struct obd_device *dev = m->private;
-       struct lod_device *lod;
+       struct dt_device *dt = container_of(kobj, struct dt_device,
+                                           dd_kobj);
+       struct lod_device *lod = dt2lod_dev(dt);
 
-       LASSERT(dev != NULL);
-       lod  = lu2lod_dev(dev->obd_lu_dev);
-       seq_printf(m, "%llu\n",
-                  lod->lod_desc.ld_default_stripe_size);
-       return 0;
+       return snprintf(buf, PAGE_SIZE, "%llu\n",
+                       lod->lod_ost_descs.ltd_lov_desc.ld_default_stripe_size);
 }
 
-/**
- * Set default stripe size.
- *
- * \param[in] file     proc file
- * \param[in] buffer   string containing the maximum number of bytes stored in
- *                     each object before moving to the next object in the
- *                     layout (if any)
- * \param[in] count    @buffer length
- * \param[in] off      unused for single entry
- *
- * \retval @count      on success
- * \retval negative    error code if failed
- */
-static ssize_t
-lod_stripesize_seq_write(struct file *file, const char __user *buffer,
-                        size_t count, loff_t *off)
+static ssize_t stripesize_store(struct kobject *kobj, struct attribute *attr,
+                               const char *buffer, size_t count)
 {
-       struct seq_file *m = file->private_data;
-       struct obd_device *dev = m->private;
-       struct lod_device *lod;
+       struct dt_device *dt = container_of(kobj, struct dt_device,
+                                           dd_kobj);
+       struct lod_device *lod = dt2lod_dev(dt);
+       char tbuf[22] = "";
        s64 val;
        int rc;
 
-       LASSERT(dev != NULL);
-       lod  = lu2lod_dev(dev->obd_lu_dev);
-       rc = lprocfs_str_with_units_to_s64(buffer, count, &val, '1');
+       if (count > (sizeof(tbuf) - 1))
+               return -EINVAL;
+
+       memcpy(tbuf, buffer, count);
+
+       rc = lu_str_to_s64(tbuf, count, &val, '1');
        if (rc)
                return rc;
+
        if (val < 0)
                return -ERANGE;
 
        lod_fix_desc_stripe_size(&val);
-       lod->lod_desc.ld_default_stripe_size = val;
+       lod->lod_ost_descs.ltd_lov_desc.ld_default_stripe_size = val;
 
        return count;
 }
-LPROC_SEQ_FOPS(lod_stripesize);
+
+LUSTRE_RW_ATTR(stripesize);
 
 /**
  * Show default stripe offset.
- *
- * \param[in] m                seq file
- * \param[in] v                unused for single entry
- *
- * \retval 0           on success
- * \retval negative    error code if failed
  */
 static ssize_t stripeoffset_show(struct kobject *kobj, struct attribute *attr,
                                 char *buf)
@@ -194,7 +160,8 @@ static ssize_t stripeoffset_show(struct kobject *kobj, struct attribute *attr,
                                            dd_kobj);
        struct lod_device *lod = dt2lod_dev(dt);
 
-       return sprintf(buf, "%lld\n", lod->lod_desc.ld_default_stripe_offset);
+       return snprintf(buf, PAGE_SIZE, "%lld\n",
+               lod->lod_ost_descs.ltd_lov_desc.ld_default_stripe_offset);
 }
 
 /**
@@ -202,17 +169,10 @@ static ssize_t stripeoffset_show(struct kobject *kobj, struct attribute *attr,
  *
  * Usually contains -1 allowing Lustre to balance objects among OST
  * otherwise may cause severe OST imbalance.
- *
- * \param[in] file     proc file
- * \param[in] buffer   string describing starting OST index for new files
- * \param[in] count    @buffer length
- * \param[in] off      unused for single entry
- *
- * \retval @count      on success
- * \retval negative    error code if failed
  */
-static ssize_t stripeoffset_store(struct kobject *kobj, struct attribute *attr,
-                                 const char *buffer, size_t count)
+static ssize_t stripeoffset_store(struct kobject *kobj,
+                                   struct attribute *attr,
+                                   const char *buffer, size_t count)
 {
        struct dt_device *dt = container_of(kobj, struct dt_device,
                                            dd_kobj);
@@ -227,49 +187,51 @@ static ssize_t stripeoffset_store(struct kobject *kobj, struct attribute *attr,
        if (val < -1 || val > LOV_MAX_STRIPE_COUNT)
                return -ERANGE;
 
-       lod->lod_desc.ld_default_stripe_offset = val;
+       lod->lod_ost_descs.ltd_lov_desc.ld_default_stripe_offset = val;
 
        return count;
 }
+
 LUSTRE_RW_ATTR(stripeoffset);
 
 /**
  * Show default striping pattern (LOV_PATTERN_*).
- *
- * \param[in] m                seq file
- * \param[in] v                unused for single entry
- *
- * \retval 0           on success
- * \retval negative    error code if failed
  */
-static ssize_t stripetype_show(struct kobject *kobj, struct attribute *attr,
-                              char *buf)
+static ssize_t __stripetype_show(struct kobject *kobj, struct attribute *attr,
+                                char *buf, bool is_mdt)
 {
        struct dt_device *dt = container_of(kobj, struct dt_device,
                                            dd_kobj);
        struct lod_device *lod = dt2lod_dev(dt);
+       struct lu_tgt_descs *ltd = is_mdt ? &lod->lod_mdt_descs :
+                                           &lod->lod_ost_descs;
 
-       return sprintf(buf, "%u\n", lod->lod_desc.ld_pattern);
+       return snprintf(buf, PAGE_SIZE, "%u\n", ltd->ltd_lov_desc.ld_pattern);
+}
+
+static ssize_t mdt_stripetype_show(struct kobject *kobj, struct attribute *attr,
+                                  char *buf)
+{
+       return __stripetype_show(kobj, attr, buf, true);
+}
+
+static ssize_t stripetype_show(struct kobject *kobj, struct attribute *attr,
+                              char *buf)
+{
+       return __stripetype_show(kobj, attr, buf, false);
 }
 
 /**
  * Set default striping pattern (a number, not a human-readable string).
- *
- * \param[in] file     proc file
- * \param[in] buffer   string containing the default striping pattern for new
- *                     files. This is an integer LOV_PATTERN_* value
- * \param[in] count    @buffer length
- * \param[in] off      unused for single entry
- *
- * \retval @count      on success
- * \retval negative    error code if failed
  */
-static ssize_t stripetype_store(struct kobject *kobj, struct attribute *attr,
-                               const char *buffer, size_t count)
+static ssize_t __stripetype_store(struct kobject *kobj, struct attribute *attr,
+                                 const char *buffer, size_t count, bool is_mdt)
 {
        struct dt_device *dt = container_of(kobj, struct dt_device,
                                            dd_kobj);
        struct lod_device *lod = dt2lod_dev(dt);
+       struct lu_tgt_descs *ltd = is_mdt ? &lod->lod_mdt_descs :
+                                           &lod->lod_ost_descs;
        u32 pattern;
        int rc;
 
@@ -277,51 +239,73 @@ static ssize_t stripetype_store(struct kobject *kobj, struct attribute *attr,
        if (rc)
                return rc;
 
-       lod_fix_desc_pattern(&pattern);
-       lod->lod_desc.ld_pattern = pattern;
+       if (is_mdt)
+               lod_fix_lmv_desc_pattern(&pattern);
+       else
+               lod_fix_desc_pattern(&pattern);
+
+       ltd->ltd_lov_desc.ld_pattern = pattern;
 
        return count;
 }
+
+static ssize_t mdt_stripetype_store(struct kobject *kobj,
+                                   struct attribute *attr, const char *buffer,
+                                   size_t count)
+{
+       return __stripetype_store(kobj, attr, buffer, count, true);
+}
+
+static ssize_t stripetype_store(struct kobject *kobj,
+                                   struct attribute *attr, const char *buffer,
+                                   size_t count)
+{
+       return __stripetype_store(kobj, attr, buffer, count, false);
+}
+
+LUSTRE_RW_ATTR(mdt_stripetype);
 LUSTRE_RW_ATTR(stripetype);
 
 /**
  * Show default number of stripes.
- *
- * \param[in] m                seq file
- * \param[in] v                unused for single entry
- *
- * \retval 0           on success,
- * \retval negative    error code if failed
  */
-static ssize_t stripecount_show(struct kobject *kobj, struct attribute *attr,
-                               char *buf)
+static ssize_t __stripecount_show(struct kobject *kobj, struct attribute *attr,
+                                 char *buf, bool is_mdt)
 {
        struct dt_device *dt = container_of(kobj, struct dt_device,
                                            dd_kobj);
        struct lod_device *lod = dt2lod_dev(dt);
+       struct lov_desc *desc = is_mdt ? &lod->lod_mdt_descs.ltd_lov_desc :
+                                        &lod->lod_ost_descs.ltd_lov_desc;
+
+       return snprintf(buf, PAGE_SIZE, "%d\n",
+                     (s16)(desc->ld_default_stripe_count + 1) - 1);
+}
 
-       return sprintf(buf, "%d\n",
-                      (s16)(lod->lod_desc.ld_default_stripe_count + 1) - 1);
+static ssize_t mdt_stripecount_show(struct kobject *kobj,
+                                   struct attribute *attr, char *buf)
+{
+       return __stripecount_show(kobj, attr, buf, true);
+}
+
+static ssize_t stripecount_show(struct kobject *kobj, struct attribute *attr,
+                               char *buf)
+{
+       return __stripecount_show(kobj, attr, buf, false);
 }
 
 /**
  * Set default number of stripes.
- *
- * \param[in] file     proc file
- * \param[in] buffer   string containing the default number of stripes
- *                     for new files
- * \param[in] count    @buffer length
- * \param[in] off      unused for single entry
- *
- * \retval @count      on success
- * \retval negative    error code otherwise
  */
-static ssize_t stripecount_store(struct kobject *kobj, struct attribute *attr,
-                                 const char *buffer, size_t count)
+static ssize_t __stripecount_store(struct kobject *kobj, struct attribute *attr,
+                                  const char *buffer, size_t count,
+                                  bool is_mdt)
 {
        struct dt_device *dt = container_of(kobj, struct dt_device,
                                            dd_kobj);
        struct lod_device *lod = dt2lod_dev(dt);
+       struct lu_tgt_descs *ltd = is_mdt ? &lod->lod_mdt_descs :
+                                           &lod->lod_ost_descs;
        int stripe_count;
        int rc;
 
@@ -333,60 +317,91 @@ static ssize_t stripecount_store(struct kobject *kobj, struct attribute *attr,
                return -ERANGE;
 
        lod_fix_desc_stripe_count(&stripe_count);
-       lod->lod_desc.ld_default_stripe_count = stripe_count;
+       ltd->ltd_lov_desc.ld_default_stripe_count = stripe_count;
 
        return count;
 }
+
+static ssize_t mdt_stripecount_store(struct kobject *kobj,
+                                    struct attribute *attr,
+                                    const char *buffer, size_t count)
+{
+       return __stripecount_store(kobj, attr, buffer, count, true);
+}
+
+static ssize_t stripecount_store(struct kobject *kobj,
+                                struct attribute *attr,
+                                const char *buffer, size_t count)
+{
+       return __stripecount_store(kobj, attr, buffer, count, false);
+}
+
+LUSTRE_RW_ATTR(mdt_stripecount);
 LUSTRE_RW_ATTR(stripecount);
 
 /**
  * Show number of targets.
- *
- * \param[in] m                seq file
- * \param[in] v                unused for single entry
- *
- * \retval 0           on success
- * \retval negative    error code if failed
  */
-static ssize_t numobd_show(struct kobject *kobj, struct attribute *attr,
-                          char *buf)
+static ssize_t __numobd_show(struct kobject *kobj, struct attribute *attr,
+                            char *buf, bool is_mdt)
 {
        struct dt_device *dt = container_of(kobj, struct dt_device,
                                            dd_kobj);
        struct lod_device *lod = dt2lod_dev(dt);
+       struct lu_tgt_descs *ltd = is_mdt ? &lod->lod_mdt_descs :
+                                           &lod->lod_ost_descs;
+
+       return snprintf(buf, PAGE_SIZE, "%u\n", ltd->ltd_lov_desc.ld_tgt_count);
+}
+
+static ssize_t mdt_numobd_show(struct kobject *kobj, struct attribute *attr,
+                              char *buf)
+{
+       return __numobd_show(kobj, attr, buf, true);
+}
 
-       return sprintf(buf, "%u\n", lod->lod_desc.ld_tgt_count);
+static ssize_t numobd_show(struct kobject *kobj, struct attribute *attr,
+                          char *buf)
+{
+       return __numobd_show(kobj, attr, buf, false);
 }
+
+LUSTRE_RO_ATTR(mdt_numobd);
 LUSTRE_RO_ATTR(numobd);
 
 /**
  * Show number of active targets.
- *
- * \param[in] m                seq file
- * \param[in] v                unused for single entry
- *
- * \retval 0           on success
- * \retval negative    error code if failed
  */
-static ssize_t activeobd_show(struct kobject *kobj, struct attribute *attr,
-                             char *buf)
+static ssize_t __activeobd_show(struct kobject *kobj, struct attribute *attr,
+                               char *buf, bool is_mdt)
 {
        struct dt_device *dt = container_of(kobj, struct dt_device,
                                            dd_kobj);
        struct lod_device *lod = dt2lod_dev(dt);
+       struct lu_tgt_descs *ltd = is_mdt ? &lod->lod_mdt_descs :
+                                           &lod->lod_ost_descs;
+
+       return snprintf(buf, PAGE_SIZE, "%u\n",
+                       ltd->ltd_lov_desc.ld_active_tgt_count);
+}
+
+static ssize_t mdt_activeobd_show(struct kobject *kobj, struct attribute *attr,
+                                 char *buf)
+{
+       return __activeobd_show(kobj, attr, buf, true);
+}
 
-       return sprintf(buf, "%u\n", lod->lod_desc.ld_active_tgt_count);
+static ssize_t activeobd_show(struct kobject *kobj, struct attribute *attr,
+                             char *buf)
+{
+       return __activeobd_show(kobj, attr, buf, false);
 }
+
+LUSTRE_RO_ATTR(mdt_activeobd);
 LUSTRE_RO_ATTR(activeobd);
 
 /**
  * Show UUID of LOD device.
- *
- * \param[in] m                seq file
- * \param[in] v                unused for single entry
- *
- * \retval 0           on success
- * \retval negative    error code if failed
  */
 static ssize_t desc_uuid_show(struct kobject *kobj, struct attribute *attr,
                              char *buf)
@@ -395,7 +410,8 @@ static ssize_t desc_uuid_show(struct kobject *kobj, struct attribute *attr,
                                            dd_kobj);
        struct lod_device *lod = dt2lod_dev(dt);
 
-       return sprintf(buf, "%s\n", lod->lod_desc.ld_uuid.uuid);
+       return snprintf(buf, PAGE_SIZE, "%s\n",
+                      lod->lod_ost_descs.ltd_lov_desc.ld_uuid.uuid);
 }
 LUSTRE_RO_ATTR(desc_uuid);
 
@@ -406,22 +422,31 @@ LUSTRE_RO_ATTR(desc_uuid);
  * of free space compared to performance. 0% means select OSTs equally
  * regardless of their free space, 100% means select OSTs only by their free
  * space even if it results in very imbalanced load on the OSTs.
- *
- * \param[in] m                seq file
- * \param[in] v                unused for single entry
- *
- * \retval 0           on success
- * \retval negative    error code if failed
  */
-static ssize_t qos_prio_free_show(struct kobject *kobj, struct attribute *attr,
-                                 char *buf)
+static ssize_t __qos_prio_free_show(struct kobject *kobj,
+                                   struct attribute *attr, char *buf,
+                                   bool is_mdt)
 {
        struct dt_device *dt = container_of(kobj, struct dt_device,
                                            dd_kobj);
        struct lod_device *lod = dt2lod_dev(dt);
+       struct lu_tgt_descs *ltd = is_mdt ? &lod->lod_mdt_descs :
+                                           &lod->lod_ost_descs;
 
-       return sprintf(buf, "%d%%\n",
-                      (lod->lod_qos.lq_prio_free * 100 + 255) >> 8);
+       return snprintf(buf, PAGE_SIZE, "%d%%\n",
+                      (ltd->ltd_qos.lq_prio_free * 100 + 255) >> 8);
+}
+
+static ssize_t mdt_qos_prio_free_show(struct kobject *kobj,
+                                     struct attribute *attr, char *buf)
+{
+       return __qos_prio_free_show(kobj, attr, buf, true);
+}
+
+static ssize_t qos_prio_free_show(struct kobject *kobj,
+                                 struct attribute *attr, char *buf)
+{
+       return __qos_prio_free_show(kobj, attr, buf, false);
 }
 
 /**
@@ -431,21 +456,17 @@ static ssize_t qos_prio_free_show(struct kobject *kobj, struct attribute *attr,
  * are space imbalanced.  See lod_qos_priofree_seq_show() for description of
  * this parameter.  See lod_qos_thresholdrr_seq_write() and lq_threshold_rr to
  * determine what constitutes "space imbalanced" OSTs.
- *
- * \param[in] file     proc file
- * \param[in] buffer   string which contains the free space priority (0-100)
- * \param[in] count    @buffer length
- * \param[in] off      unused for single entry
- *
- * \retval @count      on success
- * \retval negative    error code if failed
  */
-static ssize_t qos_prio_free_store(struct kobject *kobj, struct attribute *attr,
-                                  const char *buffer, size_t count)
+static ssize_t __qos_prio_free_store(struct kobject *kobj,
+                                    struct attribute *attr,
+                                    const char *buffer, size_t count,
+                                    bool is_mdt)
 {
        struct dt_device *dt = container_of(kobj, struct dt_device,
                                            dd_kobj);
        struct lod_device *lod = dt2lod_dev(dt);
+       struct lu_tgt_descs *ltd = is_mdt ? &lod->lod_mdt_descs :
+                                           &lod->lod_ost_descs;
        unsigned int val;
        int rc;
 
@@ -455,33 +476,56 @@ static ssize_t qos_prio_free_store(struct kobject *kobj, struct attribute *attr,
 
        if (val > 100)
                return -EINVAL;
-       lod->lod_qos.lq_prio_free = (val << 8) / 100;
-       lod->lod_qos.lq_dirty = 1;
-       lod->lod_qos.lq_reset = 1;
+       ltd->ltd_qos.lq_prio_free = (val << 8) / 100;
+       ltd->ltd_qos.lq_dirty = 1;
+       ltd->ltd_qos.lq_reset = 1;
 
        return count;
 }
+
+static ssize_t mdt_qos_prio_free_store(struct kobject *kobj,
+                                      struct attribute *attr,
+                                      const char *buffer, size_t count)
+{
+       return __qos_prio_free_store(kobj, attr, buffer, count, true);
+}
+
+static ssize_t qos_prio_free_store(struct kobject *kobj, struct attribute *attr,
+                                  const char *buffer, size_t count)
+{
+       return __qos_prio_free_store(kobj, attr, buffer, count, false);
+}
+
+LUSTRE_RW_ATTR(mdt_qos_prio_free);
 LUSTRE_RW_ATTR(qos_prio_free);
 
 /**
  * Show threshold for "same space on all OSTs" rule.
- *
- * \param[in] m                seq file
- * \param[in] v                unused for single entry
- *
- * \retval 0           on success
- * \retval negative    error code if failed
  */
-static int lod_qos_thresholdrr_seq_show(struct seq_file *m, void *v)
+static ssize_t __qos_thresholdrr_show(struct kobject *kobj,
+                                   struct attribute *attr, char *buf,
+                                   bool is_mdt)
 {
-       struct obd_device *dev = m->private;
-       struct lod_device *lod;
+       struct dt_device *dt = container_of(kobj, struct dt_device,
+                                           dd_kobj);
+       struct lod_device *lod = dt2lod_dev(dt);
+       struct lu_tgt_descs *ltd = is_mdt ? &lod->lod_mdt_descs :
+                                           &lod->lod_ost_descs;
 
-       LASSERT(dev != NULL);
-       lod = lu2lod_dev(dev->obd_lu_dev);
-       seq_printf(m, "%d%%\n",
-                  (lod->lod_qos.lq_threshold_rr * 100 + 255) >> 8);
-       return 0;
+       return snprintf(buf, PAGE_SIZE, "%d%%\n",
+                      (ltd->ltd_qos.lq_threshold_rr * 100 + 255) >> 8);
+}
+
+static ssize_t mdt_qos_thresholdrr_show(struct kobject *kobj,
+                                       struct attribute *attr, char *buf)
+{
+       return __qos_thresholdrr_show(kobj, attr, buf, true);
+}
+
+static ssize_t lod_qos_thresholdrr_show(struct kobject *kobj,
+                                       struct attribute *attr, char *buf)
+{
+       return __qos_thresholdrr_show(kobj, attr, buf, false);
 }
 
 /**
@@ -492,84 +536,94 @@ static int lod_qos_thresholdrr_seq_show(struct seq_file *m, void *v)
  * is exceeded, use the QoS allocator to select OSTs based on their available
  * space so that more full OSTs are chosen less often, otherwise use the
  * round-robin allocator for efficiency and performance.
-
- * \param[in] file     proc file
- * \param[in] buffer   string containing percentage difference of free space
- * \param[in] count    @buffer length
- * \param[in] off      unused for single entry
- *
- * \retval @count      on success
- * \retval negative    error code if failed
  */
-static ssize_t
-lod_qos_thresholdrr_seq_write(struct file *file, const char __user *buffer,
-                             size_t count, loff_t *off)
+static ssize_t __qos_thresholdrr_store(struct kobject *kobj,
+                                      struct attribute *attr,
+                                      const char *buffer, size_t count,
+                                      bool is_mdt)
 {
-       struct seq_file *m = file->private_data;
-       struct obd_device *dev = m->private;
-       struct lod_device *lod;
+       struct dt_device *dt = container_of(kobj, struct dt_device,
+                                           dd_kobj);
+       struct lod_device *lod = dt2lod_dev(dt);
+       struct lu_tgt_descs *ltd = is_mdt ? &lod->lod_mdt_descs :
+                                           &lod->lod_ost_descs;
+       unsigned int val;
        int rc;
-       __s64 val;
-
-       LASSERT(dev != NULL);
-       lod = lu2lod_dev(dev->obd_lu_dev);
 
-       rc = lprocfs_str_with_units_to_s64(buffer, count, &val, '%');
+       rc = kstrtouint(buffer, 0, &val);
        if (rc)
                return rc;
 
-       if (val > 100 || val < 0)
+       if (val > 100)
                return -EINVAL;
-
-       lod->lod_qos.lq_threshold_rr = (val << 8) / 100;
-       lod->lod_qos.lq_dirty = 1;
+       ltd->ltd_qos.lq_threshold_rr = (val << 8) / 100;
+       ltd->ltd_qos.lq_dirty = 1;
 
        return count;
 }
-LPROC_SEQ_FOPS(lod_qos_thresholdrr);
+
+static ssize_t mdt_qos_thresholdrr_store(struct kobject *kobj,
+                                        struct attribute *attr,
+                                        const char *buffer, size_t count)
+{
+       return __qos_thresholdrr_store(kobj, attr, buffer, count, true);
+}
+
+static ssize_t lod_qos_thresholdrr_store(struct kobject *kobj,
+                                        struct attribute *attr,
+                                        const char *buffer, size_t count)
+{
+       return __qos_thresholdrr_store(kobj, attr, buffer, count, false);
+}
+
+LUSTRE_RW_ATTR(mdt_qos_thresholdrr);
+LUSTRE_RW_ATTR(lod_qos_thresholdrr);
 
 /**
  * Show expiration period used to refresh cached statfs data, which
  * is used to implement QoS/RR striping allocation algorithm.
- *
- * \param[in] m                seq file
- * \param[in] v                unused for single entry
- *
- * \retval 0           on success
- * \retval negative    error code if failed
  */
-static ssize_t qos_maxage_show(struct kobject *kobj, struct attribute *attr,
-                              char *buf)
+static ssize_t __qos_maxage_show(struct kobject *kobj, struct attribute *attr,
+                                char *buf, bool is_mdt)
 {
        struct dt_device *dt = container_of(kobj, struct dt_device,
                                            dd_kobj);
        struct lod_device *lod = dt2lod_dev(dt);
+       struct lu_tgt_descs *ltd = is_mdt ? &lod->lod_mdt_descs :
+                                           &lod->lod_ost_descs;
+
+       return snprintf(buf, PAGE_SIZE, "%u Sec\n",
+                      ltd->ltd_lov_desc.ld_qos_maxage);
+}
 
-       return sprintf(buf, "%u Sec\n", lod->lod_desc.ld_qos_maxage);
+static ssize_t mdt_qos_maxage_show(struct kobject *kobj, struct attribute *attr,
+                                  char *buf)
+{
+       return __qos_maxage_show(kobj, attr, buf, true);
+}
+
+static ssize_t qos_maxage_show(struct kobject *kobj, struct attribute *attr,
+                              char *buf)
+{
+       return __qos_maxage_show(kobj, attr, buf, true);
 }
 
 /**
  * Set expiration period used to refresh cached statfs data.
- *
- * \param[in] file     proc file
- * \param[in] buffer   string contains maximum age of statfs data in seconds
- * \param[in] count    @buffer length
- * \param[in] off      unused for single entry
- *
- * \retval @count      on success
- * \retval negative    error code if failed
  */
-static ssize_t qos_maxage_store(struct kobject *kobj, struct attribute *attr,
-                               const char *buffer, size_t count)
+static ssize_t __qos_maxage_store(struct kobject *kobj, struct attribute *attr,
+                                 const char *buffer, size_t count, bool is_mdt)
 {
        struct dt_device *dt = container_of(kobj, struct dt_device,
                                            dd_kobj);
        struct lod_device *lod = dt2lod_dev(dt);
+       struct lu_tgt_descs *ltd = is_mdt ? &lod->lod_mdt_descs :
+                                           &lod->lod_ost_descs;
        struct lustre_cfg_bufs bufs;
        struct lu_device *next;
        struct lustre_cfg *lcfg;
        char str[32];
-       unsigned int i;
+       struct lu_tgt_desc *tgt;
        int rc;
        u32 val;
 
@@ -579,7 +633,8 @@ static ssize_t qos_maxage_store(struct kobject *kobj, struct attribute *attr,
 
        if (val <= 0)
                return -EINVAL;
-       lod->lod_desc.ld_qos_maxage = val;
+
+       ltd->ltd_lov_desc.ld_qos_maxage = val;
 
        /*
         * propogate the value down to OSPs
@@ -592,66 +647,117 @@ static ssize_t qos_maxage_store(struct kobject *kobj, struct attribute *attr,
                return -ENOMEM;
        lustre_cfg_init(lcfg, LCFG_PARAM, &bufs);
 
-       lod_getref(&lod->lod_ost_descs);
-       lod_foreach_ost(lod, i) {
-               next = &OST_TGT(lod,i)->ltd_ost->dd_lu_dev;
+       lod_getref(ltd);
+       ltd_foreach_tgt(ltd, tgt) {
+               next = &tgt->ltd_tgt->dd_lu_dev;
                rc = next->ld_ops->ldo_process_config(NULL, next, lcfg);
                if (rc)
-                       CERROR("can't set maxage on #%d: %d\n", i, rc);
+                       CERROR("can't set maxage on #%d: %d\n",
+                              tgt->ltd_index, rc);
        }
-       lod_putref(lod, &lod->lod_ost_descs);
+       lod_putref(lod, ltd);
        OBD_FREE(lcfg, lustre_cfg_len(lcfg->lcfg_bufcount, lcfg->lcfg_buflens));
 
        return count;
 }
+
+static ssize_t mdt_qos_maxage_store(struct kobject *kobj,
+                                   struct attribute *attr,
+                                   const char *buffer, size_t count)
+{
+       return __qos_maxage_store(kobj, attr, buffer, count, true);
+}
+
+static ssize_t qos_maxage_store(struct kobject *kobj, struct attribute *attr,
+                               const char *buffer, size_t count)
+{
+       return __qos_maxage_store(kobj, attr, buffer, count, false);
+}
+
+LUSTRE_RW_ATTR(mdt_qos_maxage);
 LUSTRE_RW_ATTR(qos_maxage);
 
-static void *lod_osts_seq_start(struct seq_file *p, loff_t *pos)
+static void *lod_tgts_seq_start(struct seq_file *p, loff_t *pos, bool is_mdt)
 {
        struct obd_device *dev = p->private;
-       struct lod_device *lod;
+       struct lod_device *lod = lu2lod_dev(dev->obd_lu_dev);
+       struct lu_tgt_descs *ltd = is_mdt ? &lod->lod_mdt_descs :
+                                           &lod->lod_ost_descs;
 
        LASSERT(dev != NULL);
-       lod = lu2lod_dev(dev->obd_lu_dev);
 
-       lod_getref(&lod->lod_ost_descs); /* released in lod_osts_seq_stop */
-       if (*pos >= lod->lod_ost_bitmap->size)
+       lod_getref(ltd); /* released in lod_tgts_seq_stop */
+       if (*pos >= ltd->ltd_tgt_bitmap->size)
                return NULL;
 
-       *pos = find_next_bit(lod->lod_ost_bitmap->data,
-                                lod->lod_ost_bitmap->size, *pos);
-       if (*pos < lod->lod_ost_bitmap->size)
-               return OST_TGT(lod,*pos);
+       *pos = find_next_bit(ltd->ltd_tgt_bitmap->data,
+                            ltd->ltd_tgt_bitmap->size, *pos);
+       if (*pos < ltd->ltd_tgt_bitmap->size)
+               return LTD_TGT(ltd, *pos);
        else
                return NULL;
 }
 
-static void lod_osts_seq_stop(struct seq_file *p, void *v)
+static void *lod_mdts_seq_start(struct seq_file *p, loff_t *pos)
+{
+       return lod_tgts_seq_start(p, pos, true);
+}
+
+static void *lod_osts_seq_start(struct seq_file *p, loff_t *pos)
+{
+       return lod_tgts_seq_start(p, pos, false);
+}
+
+static void lod_tgts_seq_stop(struct seq_file *p, void *v, bool is_mdt)
 {
        struct obd_device *dev = p->private;
-       struct lod_device *lod;
+       struct lod_device *lod = lu2lod_dev(dev->obd_lu_dev);
+       struct lu_tgt_descs *ltd = is_mdt ? &lod->lod_mdt_descs :
+                                           &lod->lod_ost_descs;
 
        LASSERT(dev != NULL);
-       lod = lu2lod_dev(dev->obd_lu_dev);
-       lod_putref(lod, &lod->lod_ost_descs);
+       lod_putref(lod, ltd);
 }
 
-static void *lod_osts_seq_next(struct seq_file *p, void *v, loff_t *pos)
+static void lod_mdts_seq_stop(struct seq_file *p, void *v)
+{
+       lod_tgts_seq_stop(p, v, true);
+}
+
+static void lod_osts_seq_stop(struct seq_file *p, void *v)
+{
+       lod_tgts_seq_stop(p, v, false);
+}
+
+static void *lod_tgts_seq_next(struct seq_file *p, void *v, loff_t *pos,
+                              bool is_mdt)
 {
        struct obd_device *dev = p->private;
        struct lod_device *lod = lu2lod_dev(dev->obd_lu_dev);
+       struct lu_tgt_descs *ltd = is_mdt ? &lod->lod_mdt_descs :
+                                           &lod->lod_ost_descs;
 
-       if (*pos >= lod->lod_ost_bitmap->size - 1)
+       if (*pos >= ltd->ltd_tgt_bitmap->size - 1)
                return NULL;
 
-       *pos = find_next_bit(lod->lod_ost_bitmap->data,
-                                lod->lod_ost_bitmap->size, *pos + 1);
-       if (*pos < lod->lod_ost_bitmap->size)
-               return OST_TGT(lod,*pos);
+       *pos = find_next_bit(ltd->ltd_tgt_bitmap->data,
+                            ltd->ltd_tgt_bitmap->size, *pos + 1);
+       if (*pos < ltd->ltd_tgt_bitmap->size)
+               return LTD_TGT(ltd, *pos);
        else
                return NULL;
 }
 
+static void *lod_mdts_seq_next(struct seq_file *p, void *v, loff_t *pos)
+{
+       return lod_tgts_seq_next(p, v, pos, true);
+}
+
+static void *lod_osts_seq_next(struct seq_file *p, void *v, loff_t *pos)
+{
+       return lod_tgts_seq_next(p, v, pos, false);
+}
+
 /**
  * Show active/inactive status for OST found by lod_osts_seq_next().
  *
@@ -661,45 +767,62 @@ static void *lod_osts_seq_next(struct seq_file *p, void *v, loff_t *pos)
  * \retval 0           on success
  * \retval negative    error code if failed
  */
-static int lod_osts_seq_show(struct seq_file *p, void *v)
+static int lod_tgts_seq_show(struct seq_file *p, void *v)
 {
-       struct obd_device   *obd = p->private;
-       struct lod_ost_desc *ost_desc = v;
-       struct lod_device   *lod;
-       int                  idx, rc, active;
-       struct dt_device    *next;
-       struct obd_statfs    sfs;
+       struct obd_device *obd = p->private;
+       struct lu_tgt_desc *tgt = v;
+       struct dt_device *next;
+       int rc, active;
 
        LASSERT(obd->obd_lu_dev);
-       lod = lu2lod_dev(obd->obd_lu_dev);
 
-       idx = ost_desc->ltd_index;
-       next = OST_TGT(lod,idx)->ltd_ost;
-       if (next == NULL)
+       next = tgt->ltd_tgt;
+       if (!next)
                return -EINVAL;
 
        /* XXX: should be non-NULL env, but it's very expensive */
        active = 1;
-       rc = dt_statfs(NULL, next, &sfs);
+       rc = dt_statfs(NULL, next, &tgt->ltd_statfs);
        if (rc == -ENOTCONN) {
                active = 0;
                rc = 0;
        } else if (rc)
                return rc;
 
-       seq_printf(p, "%d: %s %sACTIVE\n", idx,
-                  obd_uuid2str(&ost_desc->ltd_uuid),
+       seq_printf(p, "%d: %s %sACTIVE\n", tgt->ltd_index,
+                  obd_uuid2str(&tgt->ltd_uuid),
                   active ? "" : "IN");
        return 0;
 }
 
+static const struct seq_operations lod_mdts_sops = {
+       .start  = lod_mdts_seq_start,
+       .stop   = lod_mdts_seq_stop,
+       .next   = lod_mdts_seq_next,
+       .show   = lod_tgts_seq_show,
+};
+
 static const struct seq_operations lod_osts_sops = {
        .start  = lod_osts_seq_start,
        .stop   = lod_osts_seq_stop,
        .next   = lod_osts_seq_next,
-       .show   = lod_osts_seq_show,
+       .show   = lod_tgts_seq_show,
 };
 
+static int lod_mdts_seq_open(struct inode *inode, struct file *file)
+{
+       struct seq_file *seq;
+       int rc;
+
+       rc = seq_open(file, &lod_mdts_sops);
+       if (rc)
+               return rc;
+
+       seq = file->private_data;
+       seq->private = PDE_DATA(inode);
+       return 0;
+}
+
 static int lod_osts_seq_open(struct inode *inode, struct file *file)
 {
        struct seq_file *seq;
@@ -716,12 +839,6 @@ static int lod_osts_seq_open(struct inode *inode, struct file *file)
 
 /**
  * Show whether special failout mode for testing is enabled or not.
- *
- * \param[in] m                seq file
- * \param[in] v                unused for single entry
- *
- * \retval 0           on success
- * \retval negative    error code if failed
  */
 static ssize_t lmv_failout_show(struct kobject *kobj, struct attribute *attr,
                                char *buf)
@@ -730,7 +847,7 @@ static ssize_t lmv_failout_show(struct kobject *kobj, struct attribute *attr,
                                            dd_kobj);
        struct lod_device *lod = dt2lod_dev(dt);
 
-       return sprintf(buf, "%d\n", lod->lod_lmv_failout ? 1 : 0);
+       return snprintf(buf, PAGE_SIZE, "%d\n", lod->lod_lmv_failout ? 1 : 0);
 }
 
 /**
@@ -739,14 +856,6 @@ static ssize_t lmv_failout_show(struct kobject *kobj, struct attribute *attr,
  * This determines whether the LMV will try to continue processing a striped
  * directory even if it has a (partly) corrupted entry in the master directory,
  * or if it will abort upon finding a corrupted slave directory entry.
- *
- * \param[in] file     proc file
- * \param[in] buffer   string: 0 or non-zero to disable or enable LMV failout
- * \param[in] count    @buffer length
- * \param[in] off      unused for single entry
- *
- * \retval @count      on success
- * \retval negative    error code if failed
  */
 static ssize_t lmv_failout_store(struct kobject *kobj, struct attribute *attr,
                                 const char *buffer, size_t count)
@@ -768,15 +877,17 @@ static ssize_t lmv_failout_store(struct kobject *kobj, struct attribute *attr,
 LUSTRE_RW_ATTR(lmv_failout);
 
 static struct lprocfs_vars lprocfs_lod_obd_vars[] = {
-       { .name =       "stripesize",
-         .fops =       &lod_stripesize_fops    },
-       { .name =       "qos_threshold_rr",
-         .fops =       &lod_qos_thresholdrr_fops },
-       { .name =       "dom_stripesize",
-         .fops =       &lod_dom_stripesize_fops        },
        { NULL }
 };
 
+static const struct file_operations lod_proc_mdt_fops = {
+       .owner   = THIS_MODULE,
+       .open    = lod_mdts_seq_open,
+       .read    = seq_read,
+       .llseek  = seq_lseek,
+       .release = lprocfs_seq_release,
+};
+
 static const struct file_operations lod_proc_target_fops = {
        .owner   = THIS_MODULE,
        .open    = lod_osts_seq_open,
@@ -786,6 +897,8 @@ static const struct file_operations lod_proc_target_fops = {
 };
 
 static struct attribute *lod_attrs[] = {
+       &lustre_attr_dom_stripesize.attr,
+       &lustre_attr_stripesize.attr,
        &lustre_attr_stripeoffset.attr,
        &lustre_attr_stripecount.attr,
        &lustre_attr_stripetype.attr,
@@ -795,6 +908,14 @@ static struct attribute *lod_attrs[] = {
        &lustre_attr_numobd.attr,
        &lustre_attr_qos_maxage.attr,
        &lustre_attr_qos_prio_free.attr,
+       &lustre_attr_lod_qos_thresholdrr.attr,
+       &lustre_attr_mdt_stripecount.attr,
+       &lustre_attr_mdt_stripetype.attr,
+       &lustre_attr_mdt_activeobd.attr,
+       &lustre_attr_mdt_numobd.attr,
+       &lustre_attr_mdt_qos_maxage.attr,
+       &lustre_attr_mdt_qos_prio_free.attr,
+       &lustre_attr_mdt_qos_thresholdrr.attr,
        NULL,
 };
 
@@ -808,15 +929,15 @@ static struct attribute *lod_attrs[] = {
  */
 int lod_procfs_init(struct lod_device *lod)
 {
+       struct lprocfs_vars ldebugfs_obd_vars[] = { { NULL } };
        struct obd_device *obd = lod2obd(lod);
-       struct proc_dir_entry *lov_proc_dir;
        struct obd_type *type;
        struct kobject *lov;
        int rc;
 
        lod->lod_dt_dev.dd_ktype.default_attrs = lod_attrs;
        rc = dt_tunables_init(&lod->lod_dt_dev, obd->obd_type, obd->obd_name,
-                             NULL);
+                             ldebugfs_obd_vars);
        if (rc) {
                CERROR("%s: failed to setup DT tunables: %d\n",
                       obd->obd_name, rc);
@@ -834,6 +955,14 @@ int lod_procfs_init(struct lod_device *lod)
                GOTO(out, rc);
        }
 
+       rc = lprocfs_seq_create(obd->obd_proc_entry, "mdt_obd",
+                               0444, &lod_proc_mdt_fops, obd);
+       if (rc) {
+               CWARN("%s: Error adding the target_obd file %d\n",
+                     obd->obd_name, rc);
+               GOTO(out, rc);
+       }
+
        rc = lprocfs_seq_create(obd->obd_proc_entry, "target_obd",
                                0444, &lod_proc_target_fops, obd);
        if (rc) {
@@ -854,32 +983,31 @@ int lod_procfs_init(struct lod_device *lod)
        }
 
        lov = kset_find_obj(lustre_kset, "lov");
-       if (lov) {
-               rc = sysfs_create_link(lov, &lod->lod_dt_dev.dd_kobj,
-                                      obd->obd_name);
-               kobject_put(lov);
+       if (!lov) {
+               CERROR("%s: lov subsystem not found\n", obd->obd_name);
+               GOTO(out, rc = -ENODEV);
        }
 
+       rc = sysfs_create_link(lov, &lod->lod_dt_dev.dd_kobj,
+                              obd->obd_name);
+       if (rc)
+               CERROR("%s: failed to create LOV sysfs symlink\n",
+                      obd->obd_name);
+       kobject_put(lov);
+
        lod->lod_debugfs = ldebugfs_add_symlink(obd->obd_name, "lov",
                                                "../lod/%s", obd->obd_name);
        if (!lod->lod_debugfs)
                CERROR("%s: failed to create LOV debugfs symlink\n",
                       obd->obd_name);
 
-       /* If the real LOV is present which is the case for setups
-        * with both server and clients on the same node then use
-        * the LOV's proc root */
-       type = class_search_type(LUSTRE_LOV_NAME);
-       if (type != NULL && type->typ_procroot != NULL)
-               lov_proc_dir = type->typ_procroot;
-       else
-               lov_proc_dir = obd->obd_type->typ_procsym;
-
-       if (lov_proc_dir == NULL)
+       type = container_of(lov, struct obd_type, typ_kobj);
+       if (!type->typ_procroot)
                RETURN(0);
 
        /* for compatibility we link old procfs's LOV entries to lod ones */
-       lod->lod_symlink = lprocfs_add_symlink(obd->obd_name, lov_proc_dir,
+       lod->lod_symlink = lprocfs_add_symlink(obd->obd_name,
+                                              type->typ_procroot,
                                               "../lod/%s", obd->obd_name);
        if (lod->lod_symlink == NULL)
                CERROR("cannot create LOV symlink for /proc/fs/lustre/lod/%s\n",
@@ -925,4 +1053,3 @@ void lod_procfs_fini(struct lod_device *lod)
 }
 
 #endif /* CONFIG_PROC_FS */
-