libnvdimm: write pmem label set
authorDan Williams <dan.j.williams@intel.com>
Sat, 30 May 2015 16:36:02 +0000 (12:36 -0400)
committerDan Williams <dan.j.williams@intel.com>
Thu, 25 Jun 2015 01:24:10 +0000 (21:24 -0400)
After 'uuid', 'size', and optionally 'alt_name' have been set to valid
values the labels on the dimms can be updated.

Write procedure is:
1/ Allocate and write new labels in the "next" index
2/ Free the old labels in the working copy
3/ Write the bitmap and the label space on the dimm
4/ Write the index to make the update valid

Label ranges directly mirror the dpa resource values for the given
label_id of the namespace.

Cc: Greg KH <gregkh@linuxfoundation.org>
Cc: Neil Brown <neilb@suse.de>
Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
drivers/nvdimm/dimm_devs.c
drivers/nvdimm/label.c
drivers/nvdimm/label.h
drivers/nvdimm/namespace_devs.c
drivers/nvdimm/nd.h

index 101d3b76e405a997dd2793585a9702e7fee828c6..156d518a089c4d37c0ae522b74388033d4d5c7ad 100644 (file)
@@ -132,6 +132,55 @@ int nvdimm_init_config_data(struct nvdimm_drvdata *ndd)
        return rc;
 }
 
+int nvdimm_set_config_data(struct nvdimm_drvdata *ndd, size_t offset,
+               void *buf, size_t len)
+{
+       int rc = validate_dimm(ndd);
+       size_t max_cmd_size, buf_offset;
+       struct nd_cmd_set_config_hdr *cmd;
+       struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(ndd->dev);
+       struct nvdimm_bus_descriptor *nd_desc = nvdimm_bus->nd_desc;
+
+       if (rc)
+               return rc;
+
+       if (!ndd->data)
+               return -ENXIO;
+
+       if (offset + len > ndd->nsarea.config_size)
+               return -ENXIO;
+
+       max_cmd_size = min_t(u32, PAGE_SIZE, len);
+       max_cmd_size = min_t(u32, max_cmd_size, ndd->nsarea.max_xfer);
+       cmd = kzalloc(max_cmd_size + sizeof(*cmd) + sizeof(u32), GFP_KERNEL);
+       if (!cmd)
+               return -ENOMEM;
+
+       for (buf_offset = 0; len; len -= cmd->in_length,
+                       buf_offset += cmd->in_length) {
+               size_t cmd_size;
+               u32 *status;
+
+               cmd->in_offset = offset + buf_offset;
+               cmd->in_length = min(max_cmd_size, len);
+               memcpy(cmd->in_buf, buf + buf_offset, cmd->in_length);
+
+               /* status is output in the last 4-bytes of the command buffer */
+               cmd_size = sizeof(*cmd) + cmd->in_length + sizeof(u32);
+               status = ((void *) cmd) + cmd_size - sizeof(u32);
+
+               rc = nd_desc->ndctl(nd_desc, to_nvdimm(ndd->dev),
+                               ND_CMD_SET_CONFIG_DATA, cmd, cmd_size);
+               if (rc || *status) {
+                       rc = rc ? rc : -ENXIO;
+                       break;
+               }
+       }
+       kfree(cmd);
+
+       return rc;
+}
+
 static void nvdimm_release(struct device *dev)
 {
        struct nvdimm *nvdimm = to_nvdimm(dev);
index 1a3bcd27a57aa7014be3beeea5fe53b9710d136e..ffa85d7004598d2ceb3e246974702523c56e7596 100644 (file)
@@ -12,6 +12,7 @@
  */
 #include <linux/device.h>
 #include <linux/ndctl.h>
+#include <linux/slab.h>
 #include <linux/io.h>
 #include <linux/nd.h>
 #include "nd-core.h"
@@ -55,6 +56,11 @@ size_t sizeof_namespace_index(struct nvdimm_drvdata *ndd)
        return ndd->nsindex_size;
 }
 
+static int nvdimm_num_label_slots(struct nvdimm_drvdata *ndd)
+{
+       return ndd->nsarea.config_size / 129;
+}
+
 int nd_label_validate(struct nvdimm_drvdata *ndd)
 {
        /*
@@ -201,25 +207,32 @@ static struct nd_namespace_label *nd_label_base(struct nvdimm_drvdata *ndd)
        return base + 2 * sizeof_namespace_index(ndd);
 }
 
+static int to_slot(struct nvdimm_drvdata *ndd,
+               struct nd_namespace_label *nd_label)
+{
+       return nd_label - nd_label_base(ndd);
+}
+
 #define for_each_clear_bit_le(bit, addr, size) \
        for ((bit) = find_next_zero_bit_le((addr), (size), 0);  \
             (bit) < (size);                                    \
             (bit) = find_next_zero_bit_le((addr), (size), (bit) + 1))
 
 /**
- * preamble_current - common variable initialization for nd_label_* routines
+ * preamble_index - common variable initialization for nd_label_* routines
  * @ndd: dimm container for the relevant label set
+ * @idx: namespace_index index
  * @nsindex_out: on return set to the currently active namespace index
  * @free: on return set to the free label bitmap in the index
  * @nslot: on return set to the number of slots in the label space
  */
-static bool preamble_current(struct nvdimm_drvdata *ndd,
+static bool preamble_index(struct nvdimm_drvdata *ndd, int idx,
                struct nd_namespace_index **nsindex_out,
                unsigned long **free, u32 *nslot)
 {
        struct nd_namespace_index *nsindex;
 
-       nsindex = to_current_namespace_index(ndd);
+       nsindex = to_namespace_index(ndd, idx);
        if (nsindex == NULL)
                return false;
 
@@ -239,6 +252,22 @@ char *nd_label_gen_id(struct nd_label_id *label_id, u8 *uuid, u32 flags)
        return label_id->id;
 }
 
+static bool preamble_current(struct nvdimm_drvdata *ndd,
+               struct nd_namespace_index **nsindex,
+               unsigned long **free, u32 *nslot)
+{
+       return preamble_index(ndd, ndd->ns_current, nsindex,
+                       free, nslot);
+}
+
+static bool preamble_next(struct nvdimm_drvdata *ndd,
+               struct nd_namespace_index **nsindex,
+               unsigned long **free, u32 *nslot)
+{
+       return preamble_index(ndd, ndd->ns_next, nsindex,
+                       free, nslot);
+}
+
 static bool slot_valid(struct nd_namespace_label *nd_label, u32 slot)
 {
        /* check that we are written where we expect to be written */
@@ -341,3 +370,296 @@ struct nd_namespace_label *nd_label_active(struct nvdimm_drvdata *ndd, int n)
 
        return NULL;
 }
+
+static u32 nd_label_alloc_slot(struct nvdimm_drvdata *ndd)
+{
+       struct nd_namespace_index *nsindex;
+       unsigned long *free;
+       u32 nslot, slot;
+
+       if (!preamble_next(ndd, &nsindex, &free, &nslot))
+               return UINT_MAX;
+
+       WARN_ON(!is_nvdimm_bus_locked(ndd->dev));
+
+       slot = find_next_bit_le(free, nslot, 0);
+       if (slot == nslot)
+               return UINT_MAX;
+
+       clear_bit_le(slot, free);
+
+       return slot;
+}
+
+static bool nd_label_free_slot(struct nvdimm_drvdata *ndd, u32 slot)
+{
+       struct nd_namespace_index *nsindex;
+       unsigned long *free;
+       u32 nslot;
+
+       if (!preamble_next(ndd, &nsindex, &free, &nslot))
+               return false;
+
+       WARN_ON(!is_nvdimm_bus_locked(ndd->dev));
+
+       if (slot < nslot)
+               return !test_and_set_bit_le(slot, free);
+       return false;
+}
+
+u32 nd_label_nfree(struct nvdimm_drvdata *ndd)
+{
+       struct nd_namespace_index *nsindex;
+       unsigned long *free;
+       u32 nslot;
+
+       WARN_ON(!is_nvdimm_bus_locked(ndd->dev));
+
+       if (!preamble_next(ndd, &nsindex, &free, &nslot))
+               return 0;
+
+       return bitmap_weight(free, nslot);
+}
+
+static int nd_label_write_index(struct nvdimm_drvdata *ndd, int index, u32 seq,
+               unsigned long flags)
+{
+       struct nd_namespace_index *nsindex;
+       unsigned long offset;
+       u64 checksum;
+       u32 nslot;
+       int rc;
+
+       nsindex = to_namespace_index(ndd, index);
+       if (flags & ND_NSINDEX_INIT)
+               nslot = nvdimm_num_label_slots(ndd);
+       else
+               nslot = __le32_to_cpu(nsindex->nslot);
+
+       memcpy(nsindex->sig, NSINDEX_SIGNATURE, NSINDEX_SIG_LEN);
+       nsindex->flags = __cpu_to_le32(0);
+       nsindex->seq = __cpu_to_le32(seq);
+       offset = (unsigned long) nsindex
+               - (unsigned long) to_namespace_index(ndd, 0);
+       nsindex->myoff = __cpu_to_le64(offset);
+       nsindex->mysize = __cpu_to_le64(sizeof_namespace_index(ndd));
+       offset = (unsigned long) to_namespace_index(ndd,
+                       nd_label_next_nsindex(index))
+               - (unsigned long) to_namespace_index(ndd, 0);
+       nsindex->otheroff = __cpu_to_le64(offset);
+       offset = (unsigned long) nd_label_base(ndd)
+               - (unsigned long) to_namespace_index(ndd, 0);
+       nsindex->labeloff = __cpu_to_le64(offset);
+       nsindex->nslot = __cpu_to_le32(nslot);
+       nsindex->major = __cpu_to_le16(1);
+       nsindex->minor = __cpu_to_le16(1);
+       nsindex->checksum = __cpu_to_le64(0);
+       if (flags & ND_NSINDEX_INIT) {
+               unsigned long *free = (unsigned long *) nsindex->free;
+               u32 nfree = ALIGN(nslot, BITS_PER_LONG);
+               int last_bits, i;
+
+               memset(nsindex->free, 0xff, nfree / 8);
+               for (i = 0, last_bits = nfree - nslot; i < last_bits; i++)
+                       clear_bit_le(nslot + i, free);
+       }
+       checksum = nd_fletcher64(nsindex, sizeof_namespace_index(ndd), 1);
+       nsindex->checksum = __cpu_to_le64(checksum);
+       rc = nvdimm_set_config_data(ndd, __le64_to_cpu(nsindex->myoff),
+                       nsindex, sizeof_namespace_index(ndd));
+       if (rc < 0)
+               return rc;
+
+       if (flags & ND_NSINDEX_INIT)
+               return 0;
+
+       /* copy the index we just wrote to the new 'next' */
+       WARN_ON(index != ndd->ns_next);
+       nd_label_copy(ndd, to_current_namespace_index(ndd), nsindex);
+       ndd->ns_current = nd_label_next_nsindex(ndd->ns_current);
+       ndd->ns_next = nd_label_next_nsindex(ndd->ns_next);
+       WARN_ON(ndd->ns_current == ndd->ns_next);
+
+       return 0;
+}
+
+static unsigned long nd_label_offset(struct nvdimm_drvdata *ndd,
+               struct nd_namespace_label *nd_label)
+{
+       return (unsigned long) nd_label
+               - (unsigned long) to_namespace_index(ndd, 0);
+}
+
+static int __pmem_label_update(struct nd_region *nd_region,
+               struct nd_mapping *nd_mapping, struct nd_namespace_pmem *nspm,
+               int pos)
+{
+       u64 cookie = nd_region_interleave_set_cookie(nd_region), rawsize;
+       struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
+       struct nd_namespace_label *victim_label;
+       struct nd_namespace_label *nd_label;
+       struct nd_namespace_index *nsindex;
+       unsigned long *free;
+       u32 nslot, slot;
+       size_t offset;
+       int rc;
+
+       if (!preamble_next(ndd, &nsindex, &free, &nslot))
+               return -ENXIO;
+
+       /* allocate and write the label to the staging (next) index */
+       slot = nd_label_alloc_slot(ndd);
+       if (slot == UINT_MAX)
+               return -ENXIO;
+       dev_dbg(ndd->dev, "%s: allocated: %d\n", __func__, slot);
+
+       nd_label = nd_label_base(ndd) + slot;
+       memset(nd_label, 0, sizeof(struct nd_namespace_label));
+       memcpy(nd_label->uuid, nspm->uuid, NSLABEL_UUID_LEN);
+       if (nspm->alt_name)
+               memcpy(nd_label->name, nspm->alt_name, NSLABEL_NAME_LEN);
+       nd_label->flags = __cpu_to_le32(NSLABEL_FLAG_UPDATING);
+       nd_label->nlabel = __cpu_to_le16(nd_region->ndr_mappings);
+       nd_label->position = __cpu_to_le16(pos);
+       nd_label->isetcookie = __cpu_to_le64(cookie);
+       rawsize = div_u64(resource_size(&nspm->nsio.res),
+                       nd_region->ndr_mappings);
+       nd_label->rawsize = __cpu_to_le64(rawsize);
+       nd_label->dpa = __cpu_to_le64(nd_mapping->start);
+       nd_label->slot = __cpu_to_le32(slot);
+
+       /* update label */
+       offset = nd_label_offset(ndd, nd_label);
+       rc = nvdimm_set_config_data(ndd, offset, nd_label,
+                       sizeof(struct nd_namespace_label));
+       if (rc < 0)
+               return rc;
+
+       /* Garbage collect the previous label */
+       victim_label = nd_mapping->labels[0];
+       if (victim_label) {
+               slot = to_slot(ndd, victim_label);
+               nd_label_free_slot(ndd, slot);
+               dev_dbg(ndd->dev, "%s: free: %d\n", __func__, slot);
+       }
+
+       /* update index */
+       rc = nd_label_write_index(ndd, ndd->ns_next,
+                       nd_inc_seq(__le32_to_cpu(nsindex->seq)), 0);
+       if (rc < 0)
+               return rc;
+
+       nd_mapping->labels[0] = nd_label;
+
+       return 0;
+}
+
+static int init_labels(struct nd_mapping *nd_mapping)
+{
+       int i;
+       struct nd_namespace_index *nsindex;
+       struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
+
+       if (!nd_mapping->labels)
+               nd_mapping->labels = kcalloc(2, sizeof(void *), GFP_KERNEL);
+
+       if (!nd_mapping->labels)
+               return -ENOMEM;
+
+       if (ndd->ns_current == -1 || ndd->ns_next == -1)
+               /* pass */;
+       else
+               return 0;
+
+       nsindex = to_namespace_index(ndd, 0);
+       memset(nsindex, 0, ndd->nsarea.config_size);
+       for (i = 0; i < 2; i++) {
+               int rc = nd_label_write_index(ndd, i, i*2, ND_NSINDEX_INIT);
+
+               if (rc)
+                       return rc;
+       }
+       ndd->ns_next = 1;
+       ndd->ns_current = 0;
+
+       return 0;
+}
+
+static int del_labels(struct nd_mapping *nd_mapping, u8 *uuid)
+{
+       struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
+       struct nd_namespace_label *nd_label;
+       struct nd_namespace_index *nsindex;
+       u8 label_uuid[NSLABEL_UUID_LEN];
+       int l, num_freed = 0;
+       unsigned long *free;
+       u32 nslot, slot;
+
+       if (!uuid)
+               return 0;
+
+       /* no index || no labels == nothing to delete */
+       if (!preamble_next(ndd, &nsindex, &free, &nslot)
+                       || !nd_mapping->labels)
+               return 0;
+
+       for_each_label(l, nd_label, nd_mapping->labels) {
+               int j;
+
+               memcpy(label_uuid, nd_label->uuid, NSLABEL_UUID_LEN);
+               if (memcmp(label_uuid, uuid, NSLABEL_UUID_LEN) != 0)
+                       continue;
+               slot = to_slot(ndd, nd_label);
+               nd_label_free_slot(ndd, slot);
+               dev_dbg(ndd->dev, "%s: free: %d\n", __func__, slot);
+               for (j = l; nd_mapping->labels[j + 1]; j++) {
+                       struct nd_namespace_label *next_label;
+
+                       next_label = nd_mapping->labels[j + 1];
+                       nd_mapping->labels[j] = next_label;
+               }
+               nd_mapping->labels[j] = NULL;
+               num_freed++;
+       }
+
+       if (num_freed > l) {
+               /*
+                * num_freed will only ever be > l when we delete the last
+                * label
+                */
+               kfree(nd_mapping->labels);
+               nd_mapping->labels = NULL;
+               dev_dbg(ndd->dev, "%s: no more labels\n", __func__);
+       }
+
+       return nd_label_write_index(ndd, ndd->ns_next,
+                       nd_inc_seq(__le32_to_cpu(nsindex->seq)), 0);
+}
+
+int nd_pmem_namespace_label_update(struct nd_region *nd_region,
+               struct nd_namespace_pmem *nspm, resource_size_t size)
+{
+       int i;
+
+       for (i = 0; i < nd_region->ndr_mappings; i++) {
+               struct nd_mapping *nd_mapping = &nd_region->mapping[i];
+               int rc;
+
+               if (size == 0) {
+                       rc = del_labels(nd_mapping, nspm->uuid);
+                       if (rc)
+                               return rc;
+                       continue;
+               }
+
+               rc = init_labels(nd_mapping);
+               if (rc)
+                       return rc;
+
+               rc = __pmem_label_update(nd_region, nd_mapping, nspm, i);
+               if (rc)
+                       return rc;
+       }
+
+       return 0;
+}
index 8ee1376526c7739703b26afaca933510b928727f..6d376be31937862e1b6d7cd7d903f524b025df6f 100644 (file)
@@ -34,6 +34,7 @@ enum {
        BTTINFO_MAJOR_VERSION = 1,
        ND_LABEL_MIN_SIZE = 512 * 129, /* see sizeof_namespace_index() */
        ND_LABEL_ID_SIZE = 50,
+       ND_NSINDEX_INIT = 0x1,
 };
 
 static const char NSINDEX_SIGNATURE[] = "NAMESPACE_INDEX\0";
@@ -127,4 +128,9 @@ void nd_label_copy(struct nvdimm_drvdata *ndd, struct nd_namespace_index *dst,
 size_t sizeof_namespace_index(struct nvdimm_drvdata *ndd);
 int nd_label_active_count(struct nvdimm_drvdata *ndd);
 struct nd_namespace_label *nd_label_active(struct nvdimm_drvdata *ndd, int n);
+u32 nd_label_nfree(struct nvdimm_drvdata *ndd);
+struct nd_region;
+struct nd_namespace_pmem;
+int nd_pmem_namespace_label_update(struct nd_region *nd_region,
+               struct nd_namespace_pmem *nspm, resource_size_t size);
 #endif /* __LABEL_H__ */
index ad0ec09ca40fe0e5809dee3d5b4cb87be23f4b47..546e77e122fd7d0ffaf22d8525f2955085636544 100644 (file)
@@ -149,20 +149,53 @@ static resource_size_t nd_namespace_blk_size(struct nd_namespace_blk *nsblk)
        return size;
 }
 
+static int nd_namespace_label_update(struct nd_region *nd_region,
+               struct device *dev)
+{
+       dev_WARN_ONCE(dev, dev->driver,
+                       "namespace must be idle during label update\n");
+       if (dev->driver)
+               return 0;
+
+       /*
+        * Only allow label writes that will result in a valid namespace
+        * or deletion of an existing namespace.
+        */
+       if (is_namespace_pmem(dev)) {
+               struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
+               struct resource *res = &nspm->nsio.res;
+               resource_size_t size = resource_size(res);
+
+               if (size == 0 && nspm->uuid)
+                       /* delete allocation */;
+               else if (!nspm->uuid)
+                       return 0;
+
+               return nd_pmem_namespace_label_update(nd_region, nspm, size);
+       } else if (is_namespace_blk(dev)) {
+               /* TODO: implement blk labels */
+               return 0;
+       } else
+               return -ENXIO;
+}
+
 static ssize_t alt_name_store(struct device *dev,
                struct device_attribute *attr, const char *buf, size_t len)
 {
+       struct nd_region *nd_region = to_nd_region(dev->parent);
        ssize_t rc;
 
        device_lock(dev);
        nvdimm_bus_lock(dev);
        wait_nvdimm_bus_probe_idle(dev);
        rc = __alt_name_store(dev, buf, len);
+       if (rc >= 0)
+               rc = nd_namespace_label_update(nd_region, dev);
        dev_dbg(dev, "%s: %s(%zd)\n", __func__, rc < 0 ? "fail " : "", rc);
        nvdimm_bus_unlock(dev);
        device_unlock(dev);
 
-       return rc;
+       return rc < 0 ? rc : len;
 }
 
 static ssize_t alt_name_show(struct device *dev,
@@ -709,6 +742,7 @@ static ssize_t __size_store(struct device *dev, unsigned long long val)
 static ssize_t size_store(struct device *dev,
                struct device_attribute *attr, const char *buf, size_t len)
 {
+       struct nd_region *nd_region = to_nd_region(dev->parent);
        unsigned long long val;
        u8 **uuid = NULL;
        int rc;
@@ -721,6 +755,8 @@ static ssize_t size_store(struct device *dev,
        nvdimm_bus_lock(dev);
        wait_nvdimm_bus_probe_idle(dev);
        rc = __size_store(dev, val);
+       if (rc >= 0)
+               rc = nd_namespace_label_update(nd_region, dev);
 
        if (is_namespace_pmem(dev)) {
                struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
@@ -744,7 +780,7 @@ static ssize_t size_store(struct device *dev,
        nvdimm_bus_unlock(dev);
        device_unlock(dev);
 
-       return rc ? rc : len;
+       return rc < 0 ? rc : len;
 }
 
 static ssize_t size_show(struct device *dev,
@@ -804,17 +840,34 @@ static int namespace_update_uuid(struct nd_region *nd_region,
        u32 flags = is_namespace_blk(dev) ? NSLABEL_FLAG_LOCAL : 0;
        struct nd_label_id old_label_id;
        struct nd_label_id new_label_id;
-       int i, rc;
+       int i;
 
-       rc = nd_is_uuid_unique(dev, new_uuid) ? 0 : -EINVAL;
-       if (rc) {
-               kfree(new_uuid);
-               return rc;
-       }
+       if (!nd_is_uuid_unique(dev, new_uuid))
+               return -EINVAL;
 
        if (*old_uuid == NULL)
                goto out;
 
+       /*
+        * If we've already written a label with this uuid, then it's
+        * too late to rename because we can't reliably update the uuid
+        * without losing the old namespace.  Userspace must delete this
+        * namespace to abandon the old uuid.
+        */
+       for (i = 0; i < nd_region->ndr_mappings; i++) {
+               struct nd_mapping *nd_mapping = &nd_region->mapping[i];
+
+               /*
+                * This check by itself is sufficient because old_uuid
+                * would be NULL above if this uuid did not exist in the
+                * currently written set.
+                *
+                * FIXME: can we delete uuid with zero dpa allocated?
+                */
+               if (nd_mapping->labels)
+                       return -EBUSY;
+       }
+
        nd_label_gen_id(&old_label_id, *old_uuid, flags);
        nd_label_gen_id(&new_label_id, new_uuid, flags);
        for (i = 0; i < nd_region->ndr_mappings; i++) {
@@ -858,12 +911,16 @@ static ssize_t uuid_store(struct device *dev,
        rc = nd_uuid_store(dev, &uuid, buf, len);
        if (rc >= 0)
                rc = namespace_update_uuid(nd_region, dev, uuid, ns_uuid);
+       if (rc >= 0)
+               rc = nd_namespace_label_update(nd_region, dev);
+       else
+               kfree(uuid);
        dev_dbg(dev, "%s: result: %zd wrote: %s%s", __func__,
                        rc, buf, buf[len - 1] == '\n' ? "" : "\n");
        nvdimm_bus_unlock(dev);
        device_unlock(dev);
 
-       return rc ? rc : len;
+       return rc < 0 ? rc : len;
 }
 static DEVICE_ATTR_RW(uuid);
 
@@ -907,6 +964,7 @@ static ssize_t sector_size_store(struct device *dev,
                struct device_attribute *attr, const char *buf, size_t len)
 {
        struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev);
+       struct nd_region *nd_region = to_nd_region(dev->parent);
        ssize_t rc;
 
        if (!is_namespace_blk(dev))
@@ -916,8 +974,11 @@ static ssize_t sector_size_store(struct device *dev,
        nvdimm_bus_lock(dev);
        rc = nd_sector_size_store(dev, buf, &nsblk->lbasize,
                        ns_lbasize_supported);
-       dev_dbg(dev, "%s: result: %zd wrote: %s%s", __func__,
-                       rc, buf, buf[len - 1] == '\n' ? "" : "\n");
+       if (rc >= 0)
+               rc = nd_namespace_label_update(nd_region, dev);
+       dev_dbg(dev, "%s: result: %zd %s: %s%s", __func__,
+                       rc, rc < 0 ? "tried" : "wrote", buf,
+                       buf[len - 1] == '\n' ? "" : "\n");
        nvdimm_bus_unlock(dev);
        device_unlock(dev);
 
index 9b021b6262025b33af7505a9d9ae60de5cbbe82d..bfa8496173585be2bd0728e3fca7b9c41daed190 100644 (file)
@@ -93,6 +93,7 @@ static inline unsigned nd_inc_seq(unsigned seq)
 
        return next[seq & 3];
 }
+
 enum nd_async_mode {
        ND_SYNC,
        ND_ASYNC,
@@ -115,6 +116,8 @@ struct nvdimm;
 struct nvdimm_drvdata *to_ndd(struct nd_mapping *nd_mapping);
 int nvdimm_init_nsarea(struct nvdimm_drvdata *ndd);
 int nvdimm_init_config_data(struct nvdimm_drvdata *ndd);
+int nvdimm_set_config_data(struct nvdimm_drvdata *ndd, size_t offset,
+               void *buf, size_t len);
 struct nd_region *to_nd_region(struct device *dev);
 int nd_region_to_nstype(struct nd_region *nd_region);
 int nd_region_register_namespaces(struct nd_region *nd_region, int *err);