[SCSI] libosd: attributes Support
Boaz Harrosh [Sun, 25 Jan 2009 14:59:50 +0000 (16:59 +0200)]
Support for both List-Mode and Page-Mode osd attributes. One of
these operations may be added to most other operations.

Define the OSD standard's attribute pages constants and structures
(osd_attributes.h)

Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
Reviewed-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

drivers/scsi/osd/osd_initiator.c
include/scsi/osd_attributes.h [new file with mode: 0644]

index 0e6d906..b982d76 100644 (file)
 
 #include "osd_debug.h"
 
+#ifndef __unused
+#    define __unused                   __attribute__((unused))
+#endif
+
 enum { OSD_REQ_RETRIES = 1 };
 
 MODULE_AUTHOR("Boaz Harrosh <bharrosh@panasas.com>");
@@ -63,6 +67,50 @@ static unsigned _osd_req_cdb_len(struct osd_request *or)
        return OSDv1_TOTAL_CDB_LEN;
 }
 
+static unsigned _osd_req_alist_elem_size(struct osd_request *or, unsigned len)
+{
+       return osdv1_attr_list_elem_size(len);
+}
+
+static unsigned _osd_req_alist_size(struct osd_request *or, void *list_head)
+{
+       return osdv1_list_size(list_head);
+}
+
+static unsigned _osd_req_sizeof_alist_header(struct osd_request *or)
+{
+       return sizeof(struct osdv1_attributes_list_header);
+}
+
+static void _osd_req_set_alist_type(struct osd_request *or,
+       void *list, int list_type)
+{
+       struct osdv1_attributes_list_header *attr_list = list;
+
+       memset(attr_list, 0, sizeof(*attr_list));
+       attr_list->type = list_type;
+}
+
+static bool _osd_req_is_alist_type(struct osd_request *or,
+       void *list, int list_type)
+{
+       if (!list)
+               return false;
+
+       if (1) {
+               struct osdv1_attributes_list_header *attr_list = list;
+
+               return attr_list->type == list_type;
+       }
+}
+
+static osd_cdb_offset osd_req_encode_offset(struct osd_request *or,
+       u64 offset, unsigned *padding)
+{
+       return __osd_encode_offset(offset, padding,
+                                 OSDv1_OFFSET_MIN_SHIFT, OSD_OFFSET_MAX_SHIFT);
+}
+
 void osd_dev_init(struct osd_dev *osdd, struct scsi_device *scsi_device)
 {
        memset(osdd, 0, sizeof(*osdd));
@@ -125,10 +173,25 @@ static void _abort_unexecuted_bios(struct request *rq)
        }
 }
 
+static void _osd_free_seg(struct osd_request *or __unused,
+       struct _osd_req_data_segment *seg)
+{
+       if (!seg->buff || !seg->alloc_size)
+               return;
+
+       kfree(seg->buff);
+       seg->buff = NULL;
+       seg->alloc_size = 0;
+}
+
 void osd_end_request(struct osd_request *or)
 {
        struct request *rq = or->request;
 
+       _osd_free_seg(or, &or->set_attr);
+       _osd_free_seg(or, &or->enc_get_attr);
+       _osd_free_seg(or, &or->get_attr);
+
        if (rq) {
                if (rq->next_rq) {
                        _abort_unexecuted_bios(rq->next_rq);
@@ -176,6 +239,54 @@ int osd_execute_request_async(struct osd_request *or,
 }
 EXPORT_SYMBOL(osd_execute_request_async);
 
+u8 sg_out_pad_buffer[1 << OSDv1_OFFSET_MIN_SHIFT];
+u8 sg_in_pad_buffer[1 << OSDv1_OFFSET_MIN_SHIFT];
+
+static int _osd_realloc_seg(struct osd_request *or,
+       struct _osd_req_data_segment *seg, unsigned max_bytes)
+{
+       void *buff;
+
+       if (seg->alloc_size >= max_bytes)
+               return 0;
+
+       buff = krealloc(seg->buff, max_bytes, or->alloc_flags);
+       if (!buff) {
+               OSD_ERR("Failed to Realloc %d-bytes was-%d\n", max_bytes,
+                       seg->alloc_size);
+               return -ENOMEM;
+       }
+
+       memset(buff + seg->alloc_size, 0, max_bytes - seg->alloc_size);
+       seg->buff = buff;
+       seg->alloc_size = max_bytes;
+       return 0;
+}
+
+static int _alloc_set_attr_list(struct osd_request *or,
+       const struct osd_attr *oa, unsigned nelem, unsigned add_bytes)
+{
+       unsigned total_bytes = add_bytes;
+
+       for (; nelem; --nelem, ++oa)
+               total_bytes += _osd_req_alist_elem_size(or, oa->len);
+
+       OSD_DEBUG("total_bytes=%d\n", total_bytes);
+       return _osd_realloc_seg(or, &or->set_attr, total_bytes);
+}
+
+static int _alloc_get_attr_desc(struct osd_request *or, unsigned max_bytes)
+{
+       OSD_DEBUG("total_bytes=%d\n", max_bytes);
+       return _osd_realloc_seg(or, &or->enc_get_attr, max_bytes);
+}
+
+static int _alloc_get_attr_list(struct osd_request *or)
+{
+       OSD_DEBUG("total_bytes=%d\n", or->get_attr.total_bytes);
+       return _osd_realloc_seg(or, &or->get_attr, or->get_attr.total_bytes);
+}
+
 /*
  * Common to all OSD commands
  */
@@ -284,6 +395,410 @@ void osd_req_read(struct osd_request *or,
 }
 EXPORT_SYMBOL(osd_req_read);
 
+void osd_req_get_attributes(struct osd_request *or,
+       const struct osd_obj_id *obj)
+{
+       _osd_req_encode_common(or, OSD_ACT_GET_ATTRIBUTES, obj, 0, 0);
+}
+EXPORT_SYMBOL(osd_req_get_attributes);
+
+void osd_req_set_attributes(struct osd_request *or,
+       const struct osd_obj_id *obj)
+{
+       _osd_req_encode_common(or, OSD_ACT_SET_ATTRIBUTES, obj, 0, 0);
+}
+EXPORT_SYMBOL(osd_req_set_attributes);
+
+/*
+ * Attributes List-mode
+ */
+
+int osd_req_add_set_attr_list(struct osd_request *or,
+       const struct osd_attr *oa, unsigned nelem)
+{
+       unsigned total_bytes = or->set_attr.total_bytes;
+       void *attr_last;
+       int ret;
+
+       if (or->attributes_mode &&
+           or->attributes_mode != OSD_CDB_GET_SET_ATTR_LISTS) {
+               WARN_ON(1);
+               return -EINVAL;
+       }
+       or->attributes_mode = OSD_CDB_GET_SET_ATTR_LISTS;
+
+       if (!total_bytes) { /* first-time: allocate and put list header */
+               total_bytes = _osd_req_sizeof_alist_header(or);
+               ret = _alloc_set_attr_list(or, oa, nelem, total_bytes);
+               if (ret)
+                       return ret;
+               _osd_req_set_alist_type(or, or->set_attr.buff,
+                                       OSD_ATTR_LIST_SET_RETRIEVE);
+       }
+       attr_last = or->set_attr.buff + total_bytes;
+
+       for (; nelem; --nelem) {
+               struct osd_attributes_list_element *attr;
+               unsigned elem_size = _osd_req_alist_elem_size(or, oa->len);
+
+               total_bytes += elem_size;
+               if (unlikely(or->set_attr.alloc_size < total_bytes)) {
+                       or->set_attr.total_bytes = total_bytes - elem_size;
+                       ret = _alloc_set_attr_list(or, oa, nelem, total_bytes);
+                       if (ret)
+                               return ret;
+                       attr_last =
+                               or->set_attr.buff + or->set_attr.total_bytes;
+               }
+
+               attr = attr_last;
+               attr->attr_page = cpu_to_be32(oa->attr_page);
+               attr->attr_id = cpu_to_be32(oa->attr_id);
+               attr->attr_bytes = cpu_to_be16(oa->len);
+               memcpy(attr->attr_val, oa->val_ptr, oa->len);
+
+               attr_last += elem_size;
+               ++oa;
+       }
+
+       or->set_attr.total_bytes = total_bytes;
+       return 0;
+}
+EXPORT_SYMBOL(osd_req_add_set_attr_list);
+
+static int _append_map_kern(struct request *req,
+       void *buff, unsigned len, gfp_t flags)
+{
+       struct bio *bio;
+       int ret;
+
+       bio = bio_map_kern(req->q, buff, len, flags);
+       if (IS_ERR(bio)) {
+               OSD_ERR("Failed bio_map_kern(%p, %d) => %ld\n", buff, len,
+                       PTR_ERR(bio));
+               return PTR_ERR(bio);
+       }
+       ret = blk_rq_append_bio(req->q, req, bio);
+       if (ret) {
+               OSD_ERR("Failed blk_rq_append_bio(%p) => %d\n", bio, ret);
+               bio_put(bio);
+       }
+       return ret;
+}
+
+static int _req_append_segment(struct osd_request *or,
+       unsigned padding, struct _osd_req_data_segment *seg,
+       struct _osd_req_data_segment *last_seg, struct _osd_io_info *io)
+{
+       void *pad_buff;
+       int ret;
+
+       if (padding) {
+               /* check if we can just add it to last buffer */
+               if (last_seg &&
+                   (padding <= last_seg->alloc_size - last_seg->total_bytes))
+                       pad_buff = last_seg->buff + last_seg->total_bytes;
+               else
+                       pad_buff = io->pad_buff;
+
+               ret = _append_map_kern(io->req, pad_buff, padding,
+                                      or->alloc_flags);
+               if (ret)
+                       return ret;
+               io->total_bytes += padding;
+       }
+
+       ret = _append_map_kern(io->req, seg->buff, seg->total_bytes,
+                              or->alloc_flags);
+       if (ret)
+               return ret;
+
+       io->total_bytes += seg->total_bytes;
+       OSD_DEBUG("padding=%d buff=%p total_bytes=%d\n", padding, seg->buff,
+                 seg->total_bytes);
+       return 0;
+}
+
+static int _osd_req_finalize_set_attr_list(struct osd_request *or)
+{
+       struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
+       unsigned padding;
+       int ret;
+
+       if (!or->set_attr.total_bytes) {
+               cdbh->attrs_list.set_attr_offset = OSD_OFFSET_UNUSED;
+               return 0;
+       }
+
+       cdbh->attrs_list.set_attr_bytes = cpu_to_be32(or->set_attr.total_bytes);
+       cdbh->attrs_list.set_attr_offset =
+               osd_req_encode_offset(or, or->out.total_bytes, &padding);
+
+       ret = _req_append_segment(or, padding, &or->set_attr,
+                                 or->out.last_seg, &or->out);
+       if (ret)
+               return ret;
+
+       or->out.last_seg = &or->set_attr;
+       return 0;
+}
+
+int osd_req_add_get_attr_list(struct osd_request *or,
+       const struct osd_attr *oa, unsigned nelem)
+{
+       unsigned total_bytes = or->enc_get_attr.total_bytes;
+       void *attr_last;
+       int ret;
+
+       if (or->attributes_mode &&
+           or->attributes_mode != OSD_CDB_GET_SET_ATTR_LISTS) {
+               WARN_ON(1);
+               return -EINVAL;
+       }
+       or->attributes_mode = OSD_CDB_GET_SET_ATTR_LISTS;
+
+       /* first time calc data-in list header size */
+       if (!or->get_attr.total_bytes)
+               or->get_attr.total_bytes = _osd_req_sizeof_alist_header(or);
+
+       /* calc data-out info */
+       if (!total_bytes) { /* first-time: allocate and put list header */
+               unsigned max_bytes;
+
+               total_bytes = _osd_req_sizeof_alist_header(or);
+               max_bytes = total_bytes +
+                       nelem * sizeof(struct osd_attributes_list_attrid);
+               ret = _alloc_get_attr_desc(or, max_bytes);
+               if (ret)
+                       return ret;
+
+               _osd_req_set_alist_type(or, or->enc_get_attr.buff,
+                                       OSD_ATTR_LIST_GET);
+       }
+       attr_last = or->enc_get_attr.buff + total_bytes;
+
+       for (; nelem; --nelem) {
+               struct osd_attributes_list_attrid *attrid;
+               const unsigned cur_size = sizeof(*attrid);
+
+               total_bytes += cur_size;
+               if (unlikely(or->enc_get_attr.alloc_size < total_bytes)) {
+                       or->enc_get_attr.total_bytes = total_bytes - cur_size;
+                       ret = _alloc_get_attr_desc(or,
+                                       total_bytes + nelem * sizeof(*attrid));
+                       if (ret)
+                               return ret;
+                       attr_last = or->enc_get_attr.buff +
+                               or->enc_get_attr.total_bytes;
+               }
+
+               attrid = attr_last;
+               attrid->attr_page = cpu_to_be32(oa->attr_page);
+               attrid->attr_id = cpu_to_be32(oa->attr_id);
+
+               attr_last += cur_size;
+
+               /* calc data-in size */
+               or->get_attr.total_bytes +=
+                       _osd_req_alist_elem_size(or, oa->len);
+               ++oa;
+       }
+
+       or->enc_get_attr.total_bytes = total_bytes;
+
+       OSD_DEBUG(
+              "get_attr.total_bytes=%u(%u) enc_get_attr.total_bytes=%u(%Zu)\n",
+              or->get_attr.total_bytes,
+              or->get_attr.total_bytes - _osd_req_sizeof_alist_header(or),
+              or->enc_get_attr.total_bytes,
+              (or->enc_get_attr.total_bytes - _osd_req_sizeof_alist_header(or))
+                       / sizeof(struct osd_attributes_list_attrid));
+
+       return 0;
+}
+EXPORT_SYMBOL(osd_req_add_get_attr_list);
+
+static int _osd_req_finalize_get_attr_list(struct osd_request *or)
+{
+       struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
+       unsigned out_padding;
+       unsigned in_padding;
+       int ret;
+
+       if (!or->enc_get_attr.total_bytes) {
+               cdbh->attrs_list.get_attr_desc_offset = OSD_OFFSET_UNUSED;
+               cdbh->attrs_list.get_attr_offset = OSD_OFFSET_UNUSED;
+               return 0;
+       }
+
+       ret = _alloc_get_attr_list(or);
+       if (ret)
+               return ret;
+
+       /* The out-going buffer info update */
+       OSD_DEBUG("out-going\n");
+       cdbh->attrs_list.get_attr_desc_bytes =
+               cpu_to_be32(or->enc_get_attr.total_bytes);
+
+       cdbh->attrs_list.get_attr_desc_offset =
+               osd_req_encode_offset(or, or->out.total_bytes, &out_padding);
+
+       ret = _req_append_segment(or, out_padding, &or->enc_get_attr,
+                                 or->out.last_seg, &or->out);
+       if (ret)
+               return ret;
+       or->out.last_seg = &or->enc_get_attr;
+
+       /* The incoming buffer info update */
+       OSD_DEBUG("in-coming\n");
+       cdbh->attrs_list.get_attr_alloc_length =
+               cpu_to_be32(or->get_attr.total_bytes);
+
+       cdbh->attrs_list.get_attr_offset =
+               osd_req_encode_offset(or, or->in.total_bytes, &in_padding);
+
+       ret = _req_append_segment(or, in_padding, &or->get_attr, NULL,
+                                 &or->in);
+       if (ret)
+               return ret;
+       or->in.last_seg = &or->get_attr;
+
+       return 0;
+}
+
+int osd_req_decode_get_attr_list(struct osd_request *or,
+       struct osd_attr *oa, int *nelem, void **iterator)
+{
+       unsigned cur_bytes, returned_bytes;
+       int n;
+       const unsigned sizeof_attr_list = _osd_req_sizeof_alist_header(or);
+       void *cur_p;
+
+       if (!_osd_req_is_alist_type(or, or->get_attr.buff,
+                                   OSD_ATTR_LIST_SET_RETRIEVE)) {
+               oa->attr_page = 0;
+               oa->attr_id = 0;
+               oa->val_ptr = NULL;
+               oa->len = 0;
+               *iterator = NULL;
+               return 0;
+       }
+
+       if (*iterator) {
+               BUG_ON((*iterator < or->get_attr.buff) ||
+                    (or->get_attr.buff + or->get_attr.alloc_size < *iterator));
+               cur_p = *iterator;
+               cur_bytes = (*iterator - or->get_attr.buff) - sizeof_attr_list;
+               returned_bytes = or->get_attr.total_bytes;
+       } else { /* first time decode the list header */
+               cur_bytes = sizeof_attr_list;
+               returned_bytes = _osd_req_alist_size(or, or->get_attr.buff) +
+                                       sizeof_attr_list;
+
+               cur_p = or->get_attr.buff + sizeof_attr_list;
+
+               if (returned_bytes > or->get_attr.alloc_size) {
+                       OSD_DEBUG("target report: space was not big enough! "
+                                 "Allocate=%u Needed=%u\n",
+                                 or->get_attr.alloc_size,
+                                 returned_bytes + sizeof_attr_list);
+
+                       returned_bytes =
+                               or->get_attr.alloc_size - sizeof_attr_list;
+               }
+               or->get_attr.total_bytes = returned_bytes;
+       }
+
+       for (n = 0; (n < *nelem) && (cur_bytes < returned_bytes); ++n) {
+               struct osd_attributes_list_element *attr = cur_p;
+               unsigned inc;
+
+               oa->len = be16_to_cpu(attr->attr_bytes);
+               inc = _osd_req_alist_elem_size(or, oa->len);
+               OSD_DEBUG("oa->len=%d inc=%d cur_bytes=%d\n",
+                         oa->len, inc, cur_bytes);
+               cur_bytes += inc;
+               if (cur_bytes > returned_bytes) {
+                       OSD_ERR("BAD FOOD from target. list not valid!"
+                               "c=%d r=%d n=%d\n",
+                               cur_bytes, returned_bytes, n);
+                       oa->val_ptr = NULL;
+                       break;
+               }
+
+               oa->attr_page = be32_to_cpu(attr->attr_page);
+               oa->attr_id = be32_to_cpu(attr->attr_id);
+               oa->val_ptr = attr->attr_val;
+
+               cur_p += inc;
+               ++oa;
+       }
+
+       *iterator = (returned_bytes - cur_bytes) ? cur_p : NULL;
+       *nelem = n;
+       return returned_bytes - cur_bytes;
+}
+EXPORT_SYMBOL(osd_req_decode_get_attr_list);
+
+/*
+ * Attributes Page-mode
+ */
+
+int osd_req_add_get_attr_page(struct osd_request *or,
+       u32 page_id, void *attar_page, unsigned max_page_len,
+       const struct osd_attr *set_one_attr)
+{
+       struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
+
+       if (or->attributes_mode &&
+           or->attributes_mode != OSD_CDB_GET_ATTR_PAGE_SET_ONE) {
+               WARN_ON(1);
+               return -EINVAL;
+       }
+       or->attributes_mode = OSD_CDB_GET_ATTR_PAGE_SET_ONE;
+
+       or->get_attr.buff = attar_page;
+       or->get_attr.total_bytes = max_page_len;
+
+       or->set_attr.buff = set_one_attr->val_ptr;
+       or->set_attr.total_bytes = set_one_attr->len;
+
+       cdbh->attrs_page.get_attr_page = cpu_to_be32(page_id);
+       cdbh->attrs_page.get_attr_alloc_length = cpu_to_be32(max_page_len);
+       /* ocdb->attrs_page.get_attr_offset; */
+
+       cdbh->attrs_page.set_attr_page = cpu_to_be32(set_one_attr->attr_page);
+       cdbh->attrs_page.set_attr_id = cpu_to_be32(set_one_attr->attr_id);
+       cdbh->attrs_page.set_attr_length = cpu_to_be32(set_one_attr->len);
+       /* ocdb->attrs_page.set_attr_offset; */
+       return 0;
+}
+EXPORT_SYMBOL(osd_req_add_get_attr_page);
+
+static int _osd_req_finalize_attr_page(struct osd_request *or)
+{
+       struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
+       unsigned in_padding, out_padding;
+       int ret;
+
+       /* returned page */
+       cdbh->attrs_page.get_attr_offset =
+               osd_req_encode_offset(or, or->in.total_bytes, &in_padding);
+
+       ret = _req_append_segment(or, in_padding, &or->get_attr, NULL,
+                                 &or->in);
+       if (ret)
+               return ret;
+
+       /* set one value */
+       cdbh->attrs_page.set_attr_offset =
+               osd_req_encode_offset(or, or->out.total_bytes, &out_padding);
+
+       ret = _req_append_segment(or, out_padding, &or->enc_get_attr, NULL,
+                                 &or->out);
+       return ret;
+}
+
 /*
  * osd_finalize_request and helpers
  */
@@ -378,9 +893,31 @@ int osd_finalize_request(struct osd_request *or,
                        _LLU(or->in.total_bytes), or->in.req->data_len);
        }
 
+       or->out.pad_buff = sg_out_pad_buffer;
+       or->in.pad_buff = sg_in_pad_buffer;
+
        if (!or->attributes_mode)
                or->attributes_mode = OSD_CDB_GET_SET_ATTR_LISTS;
        cdbh->command_specific_options |= or->attributes_mode;
+       if (or->attributes_mode == OSD_CDB_GET_ATTR_PAGE_SET_ONE) {
+               ret = _osd_req_finalize_attr_page(or);
+       } else {
+               /* TODO: I think that for the GET_ATTR command these 2 should
+                * be reversed to keep them in execution order (for embeded
+                * targets with low memory footprint)
+                */
+               ret = _osd_req_finalize_set_attr_list(or);
+               if (ret) {
+                       OSD_DEBUG("_osd_req_finalize_set_attr_list failed\n");
+                       return ret;
+               }
+
+               ret = _osd_req_finalize_get_attr_list(or);
+               if (ret) {
+                       OSD_DEBUG("_osd_req_finalize_get_attr_list failed\n");
+                       return ret;
+               }
+       }
 
        or->request->cmd = or->cdb.buff;
        or->request->cmd_len = _osd_req_cdb_len(or);
@@ -446,3 +983,45 @@ void osd_set_caps(struct osd_cdb *cdb, const void *caps)
 {
        memcpy(&cdb->v1.caps, caps, OSDv1_CAP_LEN);
 }
+
+/*
+ * Declared in osd_protocol.h
+ * 4.12.5 Data-In and Data-Out buffer offsets
+ * byte offset = mantissa * (2^(exponent+8))
+ * Returns the smallest allowed encoded offset that contains given @offset
+ * The actual encoded offset returned is @offset + *@padding.
+ */
+osd_cdb_offset __osd_encode_offset(
+       u64 offset, unsigned *padding, int min_shift, int max_shift)
+{
+       u64 try_offset = -1, mod, align;
+       osd_cdb_offset be32_offset;
+       int shift;
+
+       *padding = 0;
+       if (!offset)
+               return 0;
+
+       for (shift = min_shift; shift < max_shift; ++shift) {
+               try_offset = offset >> shift;
+               if (try_offset < (1 << OSD_OFFSET_MAX_BITS))
+                       break;
+       }
+
+       BUG_ON(shift == max_shift);
+
+       align = 1 << shift;
+       mod = offset & (align - 1);
+       if (mod) {
+               *padding = align - mod;
+               try_offset += 1;
+       }
+
+       try_offset |= ((shift - 8) & 0xf) << 28;
+       be32_offset = cpu_to_be32((u32)try_offset);
+
+       OSD_DEBUG("offset=%llu mantissa=%llu exp=%d encoded=%x pad=%d\n",
+                _LLU(offset), _LLU(try_offset & 0x0FFFFFFF), shift,
+                be32_offset, *padding);
+       return be32_offset;
+}
diff --git a/include/scsi/osd_attributes.h b/include/scsi/osd_attributes.h
new file mode 100644 (file)
index 0000000..f888a6f
--- /dev/null
@@ -0,0 +1,327 @@
+#ifndef __OSD_ATTRIBUTES_H__
+#define __OSD_ATTRIBUTES_H__
+
+#include "osd_protocol.h"
+
+/*
+ * Contains types and constants that define attribute pages and attribute
+ * numbers and their data types.
+ */
+
+#define ATTR_SET(pg, id, l, ptr) \
+       { .attr_page = pg, .attr_id = id, .len = l, .val_ptr = ptr }
+
+#define ATTR_DEF(pg, id, l) ATTR_SET(pg, id, l, NULL)
+
+/* osd-r10 4.7.3 Attributes pages */
+enum {
+       OSD_APAGE_OBJECT_FIRST          = 0x0,
+       OSD_APAGE_OBJECT_DIRECTORY      = 0,
+       OSD_APAGE_OBJECT_INFORMATION    = 1,
+       OSD_APAGE_OBJECT_QUOTAS         = 2,
+       OSD_APAGE_OBJECT_TIMESTAMP      = 3,
+       OSD_APAGE_OBJECT_COLLECTIONS    = 4,
+       OSD_APAGE_OBJECT_SECURITY       = 5,
+       OSD_APAGE_OBJECT_LAST           = 0x2fffffff,
+
+       OSD_APAGE_PARTITION_FIRST       = 0x30000000,
+       OSD_APAGE_PARTITION_DIRECTORY   = OSD_APAGE_PARTITION_FIRST + 0,
+       OSD_APAGE_PARTITION_INFORMATION = OSD_APAGE_PARTITION_FIRST + 1,
+       OSD_APAGE_PARTITION_QUOTAS      = OSD_APAGE_PARTITION_FIRST + 2,
+       OSD_APAGE_PARTITION_TIMESTAMP   = OSD_APAGE_PARTITION_FIRST + 3,
+       OSD_APAGE_PARTITION_SECURITY    = OSD_APAGE_PARTITION_FIRST + 5,
+       OSD_APAGE_PARTITION_LAST        = 0x5FFFFFFF,
+
+       OSD_APAGE_COLLECTION_FIRST      = 0x60000000,
+       OSD_APAGE_COLLECTION_DIRECTORY  = OSD_APAGE_COLLECTION_FIRST + 0,
+       OSD_APAGE_COLLECTION_INFORMATION = OSD_APAGE_COLLECTION_FIRST + 1,
+       OSD_APAGE_COLLECTION_TIMESTAMP  = OSD_APAGE_COLLECTION_FIRST + 3,
+       OSD_APAGE_COLLECTION_SECURITY   = OSD_APAGE_COLLECTION_FIRST + 5,
+       OSD_APAGE_COLLECTION_LAST       = 0x8FFFFFFF,
+
+       OSD_APAGE_ROOT_FIRST            = 0x90000000,
+       OSD_APAGE_ROOT_DIRECTORY        = OSD_APAGE_ROOT_FIRST + 0,
+       OSD_APAGE_ROOT_INFORMATION      = OSD_APAGE_ROOT_FIRST + 1,
+       OSD_APAGE_ROOT_QUOTAS           = OSD_APAGE_ROOT_FIRST + 2,
+       OSD_APAGE_ROOT_TIMESTAMP        = OSD_APAGE_ROOT_FIRST + 3,
+       OSD_APAGE_ROOT_SECURITY         = OSD_APAGE_ROOT_FIRST + 5,
+       OSD_APAGE_ROOT_LAST             = 0xBFFFFFFF,
+
+       OSD_APAGE_RESERVED_TYPE_FIRST   = 0xC0000000,
+       OSD_APAGE_RESERVED_TYPE_LAST    = 0xEFFFFFFF,
+
+       OSD_APAGE_COMMON_FIRST          = 0xF0000000,
+       OSD_APAGE_COMMON_LAST           = 0xFFFFFFFE,
+
+       OSD_APAGE_REQUEST_ALL           = 0xFFFFFFFF,
+};
+
+/* subcategories of attr pages within each range above */
+enum {
+       OSD_APAGE_STD_FIRST             = 0x0,
+       OSD_APAGE_STD_DIRECTORY         = 0,
+       OSD_APAGE_STD_INFORMATION       = 1,
+       OSD_APAGE_STD_QUOTAS            = 2,
+       OSD_APAGE_STD_TIMESTAMP         = 3,
+       OSD_APAGE_STD_COLLECTIONS       = 4,
+       OSD_APAGE_STD_POLICY_SECURITY   = 5,
+       OSD_APAGE_STD_LAST              = 0x0000007F,
+
+       OSD_APAGE_RESERVED_FIRST        = 0x00000080,
+       OSD_APAGE_RESERVED_LAST         = 0x00007FFF,
+
+       OSD_APAGE_OTHER_STD_FIRST       = 0x00008000,
+       OSD_APAGE_OTHER_STD_LAST        = 0x0000EFFF,
+
+       OSD_APAGE_PUBLIC_FIRST          = 0x0000F000,
+       OSD_APAGE_PUBLIC_LAST           = 0x0000FFFF,
+
+       OSD_APAGE_APP_DEFINED_FIRST     = 0x00010000,
+       OSD_APAGE_APP_DEFINED_LAST      = 0x1FFFFFFF,
+
+       OSD_APAGE_VENDOR_SPECIFIC_FIRST = 0x20000000,
+       OSD_APAGE_VENDOR_SPECIFIC_LAST  = 0x2FFFFFFF,
+};
+
+enum {
+       OSD_ATTR_PAGE_IDENTIFICATION = 0, /* in all pages 40 bytes */
+};
+
+struct page_identification {
+       u8 vendor_identification[8];
+       u8 page_identification[32];
+}  __packed;
+
+struct osd_attr_page_header {
+       __be32 page_number;
+       __be32 page_length;
+} __packed;
+
+/* 7.1.2.8 Root Information attributes page (OSD_APAGE_ROOT_INFORMATION) */
+enum {
+       OSD_ATTR_RI_OSD_SYSTEM_ID            = 0x3,   /* 20       */
+       OSD_ATTR_RI_VENDOR_IDENTIFICATION    = 0x4,   /* 8        */
+       OSD_ATTR_RI_PRODUCT_IDENTIFICATION   = 0x5,   /* 16       */
+       OSD_ATTR_RI_PRODUCT_MODEL            = 0x6,   /* 32       */
+       OSD_ATTR_RI_PRODUCT_REVISION_LEVEL   = 0x7,   /* 4        */
+       OSD_ATTR_RI_PRODUCT_SERIAL_NUMBER    = 0x8,   /* variable */
+       OSD_ATTR_RI_OSD_NAME                 = 0x9,   /* variable */
+       OSD_ATTR_RI_TOTAL_CAPACITY           = 0x80,  /* 8        */
+       OSD_ATTR_RI_USED_CAPACITY            = 0x81,  /* 8        */
+       OSD_ATTR_RI_NUMBER_OF_PARTITIONS     = 0xC0,  /* 8        */
+       OSD_ATTR_RI_CLOCK                    = 0x100, /* 6        */
+};
+/* Root_Information_attributes_page does not have a get_page structure */
+
+/* 7.1.2.9 Partition Information attributes page
+ * (OSD_APAGE_PARTITION_INFORMATION)
+ */
+enum {
+       OSD_ATTR_PI_PARTITION_ID            = 0x1,     /* 8        */
+       OSD_ATTR_PI_USERNAME                = 0x9,     /* variable */
+       OSD_ATTR_PI_USED_CAPACITY           = 0x81,    /* 8        */
+       OSD_ATTR_PI_NUMBER_OF_OBJECTS       = 0xC1,    /* 8        */
+};
+/* Partition Information attributes page does not have a get_page structure */
+
+/* 7.1.2.10 Collection Information attributes page
+ * (OSD_APAGE_COLLECTION_INFORMATION)
+ */
+enum {
+       OSD_ATTR_CI_PARTITION_ID           = 0x1,       /* 8        */
+       OSD_ATTR_CI_COLLECTION_OBJECT_ID   = 0x2,       /* 8        */
+       OSD_ATTR_CI_USERNAME               = 0x9,       /* variable */
+       OSD_ATTR_CI_USED_CAPACITY          = 0x81,      /* 8        */
+};
+/* Collection Information attributes page does not have a get_page structure */
+
+/* 7.1.2.11 User Object Information attributes page
+ * (OSD_APAGE_OBJECT_INFORMATION)
+ */
+enum {
+       OSD_ATTR_OI_PARTITION_ID         = 0x1,       /* 8        */
+       OSD_ATTR_OI_OBJECT_ID            = 0x2,       /* 8        */
+       OSD_ATTR_OI_USERNAME             = 0x9,       /* variable */
+       OSD_ATTR_OI_USED_CAPACITY        = 0x81,      /* 8        */
+       OSD_ATTR_OI_LOGICAL_LENGTH       = 0x82,      /* 8        */
+};
+/* Object Information attributes page does not have a get_page structure */
+
+/* 7.1.2.12 Root Quotas attributes page (OSD_APAGE_ROOT_QUOTAS) */
+enum {
+       OSD_ATTR_RQ_DEFAULT_MAXIMUM_USER_OBJECT_LENGTH     = 0x1,      /* 8  */
+       OSD_ATTR_RQ_PARTITION_CAPACITY_QUOTA               = 0x10001,  /* 8  */
+       OSD_ATTR_RQ_PARTITION_OBJECT_COUNT                 = 0x10002,  /* 8  */
+       OSD_ATTR_RQ_PARTITION_COLLECTIONS_PER_USER_OBJECT  = 0x10081,  /* 4  */
+       OSD_ATTR_RQ_PARTITION_COUNT                        = 0x20002,  /* 8  */
+};
+
+struct Root_Quotas_attributes_page {
+       struct osd_attr_page_header hdr; /* id=R+2, size=0x24 */
+       __be64 default_maximum_user_object_length;
+       __be64 partition_capacity_quota;
+       __be64 partition_object_count;
+       __be64 partition_collections_per_user_object;
+       __be64 partition_count;
+}  __packed;
+
+/* 7.1.2.13 Partition Quotas attributes page (OSD_APAGE_PARTITION_QUOTAS)*/
+enum {
+       OSD_ATTR_PQ_DEFAULT_MAXIMUM_USER_OBJECT_LENGTH  = 0x1,        /* 8 */
+       OSD_ATTR_PQ_CAPACITY_QUOTA                      = 0x10001,    /* 8 */
+       OSD_ATTR_PQ_OBJECT_COUNT                        = 0x10002,    /* 8 */
+       OSD_ATTR_PQ_COLLECTIONS_PER_USER_OBJECT         = 0x10081,    /* 4 */
+};
+
+struct Partition_Quotas_attributes_page {
+       struct osd_attr_page_header hdr; /* id=P+2, size=0x1C */
+       __be64 default_maximum_user_object_length;
+       __be64 capacity_quota;
+       __be64 object_count;
+       __be64 collections_per_user_object;
+}  __packed;
+
+/* 7.1.2.14 User Object Quotas attributes page (OSD_APAGE_OBJECT_QUOTAS) */
+enum {
+       OSD_ATTR_OQ_MAXIMUM_LENGTH  = 0x1,        /* 8 */
+};
+
+struct Object_Quotas_attributes_page {
+       struct osd_attr_page_header hdr; /* id=U+2, size=0x8 */
+       __be64 maximum_length;
+}  __packed;
+
+/* 7.1.2.15 Root Timestamps attributes page (OSD_APAGE_ROOT_TIMESTAMP) */
+enum {
+       OSD_ATTR_RT_ATTRIBUTES_ACCESSED_TIME  = 0x2,        /* 6 */
+       OSD_ATTR_RT_ATTRIBUTES_MODIFIED_TIME  = 0x3,        /* 6 */
+       OSD_ATTR_RT_TIMESTAMP_BYPASS          = 0xFFFFFFFE, /* 1 */
+};
+
+struct root_timestamps_attributes_page {
+       struct osd_attr_page_header hdr; /* id=R+3, size=0xD */
+       struct osd_timestamp attributes_accessed_time;
+       struct osd_timestamp attributes_modified_time;
+       u8 timestamp_bypass;
+}  __packed;
+
+/* 7.1.2.16 Partition Timestamps attributes page
+ * (OSD_APAGE_PARTITION_TIMESTAMP)
+ */
+enum {
+       OSD_ATTR_PT_CREATED_TIME              = 0x1,        /* 6 */
+       OSD_ATTR_PT_ATTRIBUTES_ACCESSED_TIME  = 0x2,        /* 6 */
+       OSD_ATTR_PT_ATTRIBUTES_MODIFIED_TIME  = 0x3,        /* 6 */
+       OSD_ATTR_PT_DATA_ACCESSED_TIME        = 0x4,        /* 6 */
+       OSD_ATTR_PT_DATA_MODIFIED_TIME        = 0x5,        /* 6 */
+       OSD_ATTR_PT_TIMESTAMP_BYPASS          = 0xFFFFFFFE, /* 1 */
+};
+
+struct partition_timestamps_attributes_page {
+       struct osd_attr_page_header hdr; /* id=P+3, size=0x1F */
+       struct osd_timestamp created_time;
+       struct osd_timestamp attributes_accessed_time;
+       struct osd_timestamp attributes_modified_time;
+       struct osd_timestamp data_accessed_time;
+       struct osd_timestamp data_modified_time;
+       u8 timestamp_bypass;
+}  __packed;
+
+/* 7.1.2.17/18 Collection/Object Timestamps attributes page
+ * (OSD_APAGE_COLLECTION_TIMESTAMP/OSD_APAGE_OBJECT_TIMESTAMP)
+ */
+enum {
+       OSD_ATTR_OT_CREATED_TIME              = 0x1,        /* 6 */
+       OSD_ATTR_OT_ATTRIBUTES_ACCESSED_TIME  = 0x2,        /* 6 */
+       OSD_ATTR_OT_ATTRIBUTES_MODIFIED_TIME  = 0x3,        /* 6 */
+       OSD_ATTR_OT_DATA_ACCESSED_TIME        = 0x4,        /* 6 */
+       OSD_ATTR_OT_DATA_MODIFIED_TIME        = 0x5,        /* 6 */
+};
+
+/* same for collection */
+struct object_timestamps_attributes_page {
+       struct osd_attr_page_header hdr; /* id=C+3/3, size=0x1E */
+       struct osd_timestamp created_time;
+       struct osd_timestamp attributes_accessed_time;
+       struct osd_timestamp attributes_modified_time;
+       struct osd_timestamp data_accessed_time;
+       struct osd_timestamp data_modified_time;
+}  __packed;
+
+/* 7.1.2.19 Collections attributes page */
+/* TBD */
+
+/* 7.1.2.20 Root Policy/Security attributes page (OSD_APAGE_ROOT_SECURITY) */
+enum {
+       OSD_ATTR_RS_DEFAULT_SECURITY_METHOD           = 0x1,       /* 1      */
+       OSD_ATTR_RS_OLDEST_VALID_NONCE_LIMIT          = 0x2,       /* 6      */
+       OSD_ATTR_RS_NEWEST_VALID_NONCE_LIMIT          = 0x3,       /* 6      */
+       OSD_ATTR_RS_PARTITION_DEFAULT_SECURITY_METHOD = 0x6,       /* 1      */
+       OSD_ATTR_RS_SUPPORTED_SECURITY_METHODS        = 0x7,       /* 2      */
+       OSD_ATTR_RS_ADJUSTABLE_CLOCK                  = 0x9,       /* 6      */
+       OSD_ATTR_RS_MASTER_KEY_IDENTIFIER             = 0x7FFD,    /* 0 or 7 */
+       OSD_ATTR_RS_ROOT_KEY_IDENTIFIER               = 0x7FFE,    /* 0 or 7 */
+       OSD_ATTR_RS_SUPPORTED_INTEGRITY_ALGORITHM_0   = 0x80000000,/* 1,(x16)*/
+       OSD_ATTR_RS_SUPPORTED_DH_GROUP_0              = 0x80000010,/* 1,(x16)*/
+};
+
+struct root_security_attributes_page {
+       struct osd_attr_page_header hdr; /* id=R+5, size=0x3F */
+       u8 default_security_method;
+       u8 partition_default_security_method;
+       __be16 supported_security_methods;
+       u8 mki_valid_rki_valid;
+       struct osd_timestamp oldest_valid_nonce_limit;
+       struct osd_timestamp newest_valid_nonce_limit;
+       struct osd_timestamp adjustable_clock;
+       u8 master_key_identifier[32-25];
+       u8 root_key_identifier[39-32];
+       u8 supported_integrity_algorithm[16];
+       u8 supported_dh_group[16];
+}  __packed;
+
+/* 7.1.2.21 Partition Policy/Security attributes page
+ * (OSD_APAGE_PARTITION_SECURITY)
+ */
+enum {
+       OSD_ATTR_PS_DEFAULT_SECURITY_METHOD        = 0x1,        /* 1      */
+       OSD_ATTR_PS_OLDEST_VALID_NONCE             = 0x2,        /* 6      */
+       OSD_ATTR_PS_NEWEST_VALID_NONCE             = 0x3,        /* 6      */
+       OSD_ATTR_PS_REQUEST_NONCE_LIST_DEPTH       = 0x4,        /* 2      */
+       OSD_ATTR_PS_FROZEN_WORKING_KEY_BIT_MASK    = 0x5,        /* 2      */
+       OSD_ATTR_PS_PARTITION_KEY_IDENTIFIER       = 0x7FFF,     /* 0 or 7 */
+       OSD_ATTR_PS_WORKING_KEY_IDENTIFIER_FIRST   = 0x8000,     /* 0 or 7 */
+       OSD_ATTR_PS_WORKING_KEY_IDENTIFIER_LAST    = 0x800F,     /* 0 or 7 */
+       OSD_ATTR_PS_POLICY_ACCESS_TAG              = 0x40000001, /* 4      */
+       OSD_ATTR_PS_USER_OBJECT_POLICY_ACCESS_TAG  = 0x40000002, /* 4      */
+};
+
+struct partition_security_attributes_page {
+       struct osd_attr_page_header hdr; /* id=p+5, size=0x8f */
+       u8 reserved[3];
+       u8 default_security_method;
+       struct osd_timestamp oldest_valid_nonce;
+       struct osd_timestamp newest_valid_nonce;
+       __be16 request_nonce_list_depth;
+       __be16 frozen_working_key_bit_mask;
+       __be32 policy_access_tag;
+       __be32 user_object_policy_access_tag;
+       u8 pki_valid;
+       __be16 wki_00_0f_vld;
+       struct osd_key_identifier partition_key_identifier;
+       struct osd_key_identifier working_key_identifiers[16];
+}  __packed;
+
+/* 7.1.2.22/23 Collection/Object Policy-Security attributes page
+ * (OSD_APAGE_COLLECTION_SECURITY/OSD_APAGE_OBJECT_SECURITY)
+ */
+enum {
+       OSD_ATTR_OS_POLICY_ACCESS_TAG              = 0x40000001, /* 4      */
+};
+
+struct object_security_attributes_page {
+       struct osd_attr_page_header hdr; /* id=C+5/5, size=4 */
+       __be32 policy_access_tag;
+}  __packed;
+
+#endif /*ndef __OSD_ATTRIBUTES_H__*/