[SCSI] libosd: OSD version 2 Support

Add support for OSD2 at run time. It is now possible to run with
both OSDv1 and OSDv2 targets at the same time. The actual detection
should be preformed by the security manager, as the version is encoded
in the capability structure.

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

1 files changed, 86 insertions, 4 deletions

diff --git a/include/scsi/osd_protocol.h b/include/scsi/osd_protocol.h
index ce1a8771ea71..cd3cbf764650 100644
--- a/include/scsi/osd_protocol.h
+++ b/include/scsi/osd_protocol.h
@@ -25,12 +25,16 @@ enum {
         OSDv1_TOTAL_CDB_LEN = OSDv1_ADDITIONAL_CDB_LENGTH + 8,
         OSDv1_CAP_LEN = 80,
         /* Latest supported version */
-        OSD_ADDITIONAL_CDB_LENGTH = OSDv1_ADDITIONAL_CDB_LENGTH,
-        OSD_TOTAL_CDB_LEN = OSDv1_TOTAL_CDB_LEN,
-        OSD_CAP_LEN = OSDv1_CAP_LEN,
+/*      OSD_ADDITIONAL_CDB_LENGTH = 216,*/
+        OSD_ADDITIONAL_CDB_LENGTH =
+                OSDv1_ADDITIONAL_CDB_LENGTH, /* FIXME: Pete rev-001 sup */
+        OSD_TOTAL_CDB_LEN = OSD_ADDITIONAL_CDB_LENGTH + 8,
+/*      OSD_CAP_LEN = 104,*/
+        OSD_CAP_LEN = OSDv1_CAP_LEN,/* FIXME: Pete rev-001 sup */
 
         OSD_SYSTEMID_LEN = 20,
         OSD_CRYPTO_KEYID_SIZE = 20,
+        /*FIXME: OSDv2_CRYPTO_KEYID_SIZE = 32,*/
         OSD_CRYPTO_SEED_SIZE = 4,
         OSD_CRYPTO_NONCE_SIZE = 12,
         OSD_MAX_SENSE_LEN = 252, /* from SPC-3 */
@@ -108,6 +112,7 @@ enum {
         OSD_OFFSET_MAX_BITS = 28,
 
         OSDv1_OFFSET_MIN_SHIFT = 8,
+        OSD_OFFSET_MIN_SHIFT = 3,
         OSD_OFFSET_MAX_SHIFT = 16,
 };
 
@@ -129,6 +134,16 @@ static inline osd_cdb_offset osd_encode_offset_v1(u64 offset, unsigned *padding)
                                 OSDv1_OFFSET_MIN_SHIFT, OSD_OFFSET_MAX_SHIFT);
 }
 
+/* Minimum 8 bytes alignment
+ * Same as v1 but since exponent can be signed than a less than
+ * 256 alignment can be reached with small offsets (<2GB)
+ */
+static inline osd_cdb_offset osd_encode_offset_v2(u64 offset, unsigned *padding)
+{
+        return __osd_encode_offset(offset, padding,
+                                   OSD_OFFSET_MIN_SHIFT, OSD_OFFSET_MAX_SHIFT);
+}
+
 /* osd2r03: 5.2.1 Overview */
 struct osd_cdb_head {
         struct scsi_varlen_cdb_hdr varlen_cdb;
@@ -144,6 +159,13 @@ struct osd_cdb_head {
 /*36*/                  __be64          length;
 /*44*/                  __be64          start_address;
                 } __packed v1;
+
+                struct __osdv2_cdb_addr_len {
+                        /* called allocation_length in some commands */
+/*32*/                  __be64  length;
+/*40*/                  __be64  start_address;
+/*48*/                  __be32 list_identifier;/* Rarely used */
+                } __packed v2;
         };
 /*52*/  union { /* selected attributes mode Page/List/Single */
                 struct osd_attributes_page_mode {
@@ -182,6 +204,7 @@ struct osd_cdb_head {
 /*80*/
 
 /*160 v1*/
+/*184 v2*/
 struct osd_security_parameters {
 /*160*/u8       integrity_check_value[OSD_CRYPTO_KEYID_SIZE];
 /*180*/u8       request_nonce[OSD_CRYPTO_NONCE_SIZE];
@@ -189,6 +212,9 @@ struct osd_security_parameters {
 /*196*/osd_cdb_offset   data_out_integrity_check_offset;
 } __packed;
 /*200 v1*/
+/*224 v2*/
+
+/* FIXME: osdv2_security_parameters */
 
 struct osdv1_cdb {
         struct osd_cdb_head h;
@@ -196,9 +222,17 @@ struct osdv1_cdb {
         struct osd_security_parameters sec_params;
 } __packed;
 
+struct osdv2_cdb {
+        struct osd_cdb_head h;
+        u8 caps[OSD_CAP_LEN];
+        struct osd_security_parameters sec_params;
+        /* FIXME: osdv2_security_parameters */
+} __packed;
+
 struct osd_cdb {
         union {
                 struct osdv1_cdb v1;
+                struct osdv2_cdb v2;
                 u8 buff[OSD_TOTAL_CDB_LEN];
         };
 } __packed;
@@ -269,6 +303,7 @@ struct osd_attributes_list_attrid {
 /*
  * osd2r03: 7.1.3.3 List entry format for retrieved attributes and
  *                  for setting attributes
+ * NOTE: v2 is 8-bytes aligned, v1 is not aligned.
  */
 struct osd_attributes_list_element {
         __be32 attr_page;
@@ -279,6 +314,7 @@ struct osd_attributes_list_element {
 
 enum {
         OSDv1_ATTRIBUTES_ELEM_ALIGN = 1,
+        OSD_ATTRIBUTES_ELEM_ALIGN = 8,
 };
 
 enum {
@@ -292,6 +328,12 @@ static inline unsigned osdv1_attr_list_elem_size(unsigned len)
                      OSDv1_ATTRIBUTES_ELEM_ALIGN);
 }
 
+static inline unsigned osdv2_attr_list_elem_size(unsigned len)
+{
+        return ALIGN(len + sizeof(struct osd_attributes_list_element),
+                     OSD_ATTRIBUTES_ELEM_ALIGN);
+}
+
 /*
  * osd2r03: 7.1.3 OSD attributes lists (Table 184) — List type values
  */
@@ -326,6 +368,21 @@ static inline unsigned osdv1_list_size(struct osdv1_attributes_list_header *h)
         return be16_to_cpu(h->list_bytes);
 }
 
+struct osdv2_attributes_list_header {
+        u8 type;        /* lower 4-bits only */
+        u8 pad[3];
+/*4*/   __be32 list_bytes; /* Initiator shall set to zero. Only set by target */
+        /*
+         * type=9 followed by struct osd_attributes_list_element's
+         * type=E followed by struct osd_attributes_list_multi_header's
+         */
+} __packed;
+
+static inline unsigned osdv2_list_size(struct osdv2_attributes_list_header *h)
+{
+        return be32_to_cpu(h->list_bytes);
+}
+
 /* (osd-r10 6.13)
  * osd2r03: 6.15 LIST (Table 79) LIST command parameter data.
  *      for root_lstchg below
@@ -469,11 +526,36 @@ struct osdv1_cap_object_descriptor {
 } __packed;
 /*80 v1*/
 
-struct osd_capability {
+/*56 v2*/
+struct osd_cap_object_descriptor {
+        union {
+                struct {
+/*56*/                  __be32 allowed_attributes_access;
+/*60*/                  __be32 policy_access_tag;
+/*64*/                  __be16 boot_epoch;
+/*66*/                  u8 reserved[6];
+/*72*/                  __be64 allowed_partition_id;
+/*80*/                  __be64 allowed_object_id;
+/*88*/                  __be64 allowed_range_length;
+/*96*/                  __be64 allowed_range_start;
+                } __packed obj_desc;
+
+/*56*/          u8 object_descriptor[48];
+        };
+} __packed;
+/*104 v2*/
+
+struct osdv1_capability {
         struct osd_capability_head h;
         struct osdv1_cap_object_descriptor od;
 } __packed;
 
+struct osd_capability {
+        struct osd_capability_head h;
+/*      struct osd_cap_object_descriptor od;*/
+        struct osdv1_cap_object_descriptor od; /* FIXME: Pete rev-001 sup */
+} __packed;
+
 /**
  * osd_sec_set_caps - set cap-bits into the capabilities header
  *