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Diffstat (limited to '')
| -rw-r--r-- | include/scsi/osd_protocol.h | 676 |
1 files changed, 676 insertions, 0 deletions
diff --git a/include/scsi/osd_protocol.h b/include/scsi/osd_protocol.h new file mode 100644 index 000000000..e0ca835e7 --- /dev/null +++ b/include/scsi/osd_protocol.h @@ -0,0 +1,676 @@ +/* + * osd_protocol.h - OSD T10 standard C definitions. + * + * Copyright (C) 2008 Panasas Inc. All rights reserved. + * + * Authors: + * Boaz Harrosh <ooo@electrozaur.com> + * Benny Halevy <bhalevy@panasas.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * + * This file contains types and constants that are defined by the protocol + * Note: All names and symbols are taken from the OSD standard's text. + */ +#ifndef __OSD_PROTOCOL_H__ +#define __OSD_PROTOCOL_H__ + +#include <linux/types.h> +#include <linux/kernel.h> +#include <asm/unaligned.h> +#include <scsi/scsi.h> + +enum { + OSDv1_ADDITIONAL_CDB_LENGTH = 192, + OSDv1_TOTAL_CDB_LEN = OSDv1_ADDITIONAL_CDB_LENGTH + 8, + OSDv1_CAP_LEN = 80, + + /* Latest supported version */ + OSDv2_ADDITIONAL_CDB_LENGTH = 228, + OSD_ADDITIONAL_CDB_LENGTH = + OSDv2_ADDITIONAL_CDB_LENGTH, + OSD_TOTAL_CDB_LEN = OSD_ADDITIONAL_CDB_LENGTH + 8, + OSD_CAP_LEN = 104, + + OSD_SYSTEMID_LEN = 20, + OSDv1_CRYPTO_KEYID_SIZE = 20, + OSDv2_CRYPTO_KEYID_SIZE = 32, + OSD_CRYPTO_KEYID_SIZE = OSDv2_CRYPTO_KEYID_SIZE, + OSD_CRYPTO_SEED_SIZE = 4, + OSD_CRYPTO_NONCE_SIZE = 12, + OSD_MAX_SENSE_LEN = 252, /* from SPC-3 */ + + OSD_PARTITION_FIRST_ID = 0x10000, + OSD_OBJECT_FIRST_ID = 0x10000, +}; + +/* (osd-r10 5.2.4) + * osd2r03: 5.2.3 Caching control bits + */ +enum osd_options_byte { + OSD_CDB_FUA = 0x08, /* Force Unit Access */ + OSD_CDB_DPO = 0x10, /* Disable Page Out */ +}; + +/* + * osd2r03: 5.2.5 Isolation. + * First 3 bits, V2-only. + * Also for attr 110h "default isolation method" at Root Information page + */ +enum osd_options_byte_isolation { + OSD_ISOLATION_DEFAULT = 0, + OSD_ISOLATION_NONE = 1, + OSD_ISOLATION_STRICT = 2, + OSD_ISOLATION_RANGE = 4, + OSD_ISOLATION_FUNCTIONAL = 5, + OSD_ISOLATION_VENDOR = 7, +}; + +/* (osd-r10: 6.7) + * osd2r03: 6.8 FLUSH, FLUSH COLLECTION, FLUSH OSD, FLUSH PARTITION + */ +enum osd_options_flush_scope_values { + OSD_CDB_FLUSH_ALL = 0, + OSD_CDB_FLUSH_ATTR_ONLY = 1, + + OSD_CDB_FLUSH_ALL_RECURSIVE = 2, + /* V2-only */ + OSD_CDB_FLUSH_ALL_RANGE = 2, +}; + +/* osd2r03: 5.2.10 Timestamps control */ +enum { + OSD_CDB_NORMAL_TIMESTAMPS = 0, + OSD_CDB_BYPASS_TIMESTAMPS = 0x7f, +}; + +/* (osd-r10: 5.2.2.1) + * osd2r03: 5.2.4.1 Get and set attributes CDB format selection + * 2 bits at second nibble of command_specific_options byte + */ +enum osd_attributes_mode { + /* V2-only */ + OSD_CDB_SET_ONE_ATTR = 0x10, + + OSD_CDB_GET_ATTR_PAGE_SET_ONE = 0x20, + OSD_CDB_GET_SET_ATTR_LISTS = 0x30, + + OSD_CDB_GET_SET_ATTR_MASK = 0x30, +}; + +/* (osd-r10: 4.12.5) + * osd2r03: 4.14.5 Data-In and Data-Out buffer offsets + * byte offset = mantissa * (2^(exponent+8)) + * struct { + * unsigned mantissa: 28; + * int exponent: 04; + * } + */ +typedef __be32 osd_cdb_offset; + +enum { + OSD_OFFSET_UNUSED = 0xFFFFFFFF, + OSD_OFFSET_MAX_BITS = 28, + + OSDv1_OFFSET_MIN_SHIFT = 8, + OSD_OFFSET_MIN_SHIFT = 3, + OSD_OFFSET_MAX_SHIFT = 16, +}; + +/* Return the smallest allowed encoded offset that contains @offset. + * + * The actual encoded offset returned is @offset + *padding. + * (up to max_shift, non-inclusive) + */ +osd_cdb_offset __osd_encode_offset(u64 offset, unsigned *padding, + int min_shift, int max_shift); + +/* Minimum alignment is 256 bytes + * Note: Seems from std v1 that exponent can be from 0+8 to 0xE+8 (inclusive) + * which is 8 to 23 but IBM code restricts it to 16, so be it. + */ +static inline osd_cdb_offset osd_encode_offset_v1(u64 offset, unsigned *padding) +{ + return __osd_encode_offset(offset, 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; +/*10*/ u8 options; + u8 command_specific_options; + u8 timestamp_control; +/*13*/ u8 reserved1[3]; +/*16*/ __be64 partition; +/*24*/ __be64 object; +/*32*/ union { /* V1 vs V2 alignment differences */ + struct __osdv1_cdb_addr_len { +/*32*/ __be32 list_identifier;/* Rarely used */ +/*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; + union { +/*48*/ __be32 list_identifier;/* Rarely used */ + /* OSD2r05 5.2.5 CDB continuation length */ +/*48*/ __be32 cdb_continuation_length; + }; + } __packed v2; + }; +/*52*/ union { /* selected attributes mode Page/List/Single */ + struct osd_attributes_page_mode { +/*52*/ __be32 get_attr_page; +/*56*/ __be32 get_attr_alloc_length; +/*60*/ osd_cdb_offset get_attr_offset; + +/*64*/ __be32 set_attr_page; +/*68*/ __be32 set_attr_id; +/*72*/ __be32 set_attr_length; +/*76*/ osd_cdb_offset set_attr_offset; +/*80*/ } __packed attrs_page; + + struct osd_attributes_list_mode { +/*52*/ __be32 get_attr_desc_bytes; +/*56*/ osd_cdb_offset get_attr_desc_offset; + +/*60*/ __be32 get_attr_alloc_length; +/*64*/ osd_cdb_offset get_attr_offset; + +/*68*/ __be32 set_attr_bytes; +/*72*/ osd_cdb_offset set_attr_offset; + __be32 not_used; +/*80*/ } __packed attrs_list; + + /* osd2r03:5.2.4.2 Set one attribute value using CDB fields */ + struct osd_attributes_cdb_mode { +/*52*/ __be32 set_attr_page; +/*56*/ __be32 set_attr_id; +/*60*/ __be16 set_attr_len; +/*62*/ u8 set_attr_val[18]; +/*80*/ } __packed attrs_cdb; +/*52*/ u8 get_set_attributes_parameters[28]; + }; +} __packed; +/*80*/ + +/*160 v1*/ +struct osdv1_security_parameters { +/*160*/u8 integrity_check_value[OSDv1_CRYPTO_KEYID_SIZE]; +/*180*/u8 request_nonce[OSD_CRYPTO_NONCE_SIZE]; +/*192*/osd_cdb_offset data_in_integrity_check_offset; +/*196*/osd_cdb_offset data_out_integrity_check_offset; +} __packed; +/*200 v1*/ + +/*184 v2*/ +struct osdv2_security_parameters { +/*184*/u8 integrity_check_value[OSDv2_CRYPTO_KEYID_SIZE]; +/*216*/u8 request_nonce[OSD_CRYPTO_NONCE_SIZE]; +/*228*/osd_cdb_offset data_in_integrity_check_offset; +/*232*/osd_cdb_offset data_out_integrity_check_offset; +} __packed; +/*236 v2*/ + +struct osd_security_parameters { + union { + struct osdv1_security_parameters v1; + struct osdv2_security_parameters v2; + }; +}; + +struct osdv1_cdb { + struct osd_cdb_head h; + u8 caps[OSDv1_CAP_LEN]; + struct osdv1_security_parameters sec_params; +} __packed; + +struct osdv2_cdb { + struct osd_cdb_head h; + u8 caps[OSD_CAP_LEN]; + struct osdv2_security_parameters sec_params; +} __packed; + +struct osd_cdb { + union { + struct osdv1_cdb v1; + struct osdv2_cdb v2; + u8 buff[OSD_TOTAL_CDB_LEN]; + }; +} __packed; + +static inline struct osd_cdb_head *osd_cdb_head(struct osd_cdb *ocdb) +{ + return (struct osd_cdb_head *)ocdb->buff; +} + +/* define both version actions + * Ex name = FORMAT_OSD we have OSD_ACT_FORMAT_OSD && OSDv1_ACT_FORMAT_OSD + */ +#define OSD_ACT___(Name, Num) \ + OSD_ACT_##Name = cpu_to_be16(0x8880 + Num), \ + OSDv1_ACT_##Name = cpu_to_be16(0x8800 + Num), + +/* V2 only actions */ +#define OSD_ACT_V2(Name, Num) \ + OSD_ACT_##Name = cpu_to_be16(0x8880 + Num), + +#define OSD_ACT_V1_V2(Name, Num1, Num2) \ + OSD_ACT_##Name = cpu_to_be16(Num2), \ + OSDv1_ACT_##Name = cpu_to_be16(Num1), + +enum osd_service_actions { + OSD_ACT_V2(OBJECT_STRUCTURE_CHECK, 0x00) + OSD_ACT___(FORMAT_OSD, 0x01) + OSD_ACT___(CREATE, 0x02) + OSD_ACT___(LIST, 0x03) + OSD_ACT_V2(PUNCH, 0x04) + OSD_ACT___(READ, 0x05) + OSD_ACT___(WRITE, 0x06) + OSD_ACT___(APPEND, 0x07) + OSD_ACT___(FLUSH, 0x08) + OSD_ACT_V2(CLEAR, 0x09) + OSD_ACT___(REMOVE, 0x0A) + OSD_ACT___(CREATE_PARTITION, 0x0B) + OSD_ACT___(REMOVE_PARTITION, 0x0C) + OSD_ACT___(GET_ATTRIBUTES, 0x0E) + OSD_ACT___(SET_ATTRIBUTES, 0x0F) + OSD_ACT___(CREATE_AND_WRITE, 0x12) + OSD_ACT___(CREATE_COLLECTION, 0x15) + OSD_ACT___(REMOVE_COLLECTION, 0x16) + OSD_ACT___(LIST_COLLECTION, 0x17) + OSD_ACT___(SET_KEY, 0x18) + OSD_ACT___(SET_MASTER_KEY, 0x19) + OSD_ACT___(FLUSH_COLLECTION, 0x1A) + OSD_ACT___(FLUSH_PARTITION, 0x1B) + OSD_ACT___(FLUSH_OSD, 0x1C) + + OSD_ACT_V2(QUERY, 0x20) + OSD_ACT_V2(REMOVE_MEMBER_OBJECTS, 0x21) + OSD_ACT_V2(GET_MEMBER_ATTRIBUTES, 0x22) + OSD_ACT_V2(SET_MEMBER_ATTRIBUTES, 0x23) + + OSD_ACT_V2(CREATE_CLONE, 0x28) + OSD_ACT_V2(CREATE_SNAPSHOT, 0x29) + OSD_ACT_V2(DETACH_CLONE, 0x2A) + OSD_ACT_V2(REFRESH_SNAPSHOT_CLONE, 0x2B) + OSD_ACT_V2(RESTORE_PARTITION_FROM_SNAPSHOT, 0x2C) + + OSD_ACT_V2(READ_MAP, 0x31) + OSD_ACT_V2(READ_MAPS_COMPARE, 0x32) + + OSD_ACT_V1_V2(PERFORM_SCSI_COMMAND, 0x8F7E, 0x8F7C) + OSD_ACT_V1_V2(SCSI_TASK_MANAGEMENT, 0x8F7F, 0x8F7D) + /* 0x8F80 to 0x8FFF are Vendor specific */ +}; + +/* osd2r03: 7.1.3.2 List entry format for retrieving attributes */ +struct osd_attributes_list_attrid { + __be32 attr_page; + __be32 attr_id; +} __packed; + +/* + * NOTE: v1: is not aligned. + */ +struct osdv1_attributes_list_element { + __be32 attr_page; + __be32 attr_id; + __be16 attr_bytes; /* valid bytes at attr_val without padding */ + u8 attr_val[0]; +} __packed; + +/* + * osd2r03: 7.1.3.3 List entry format for retrieved attributes and + * for setting attributes + * NOTE: v2 is 8-bytes aligned + */ +struct osdv2_attributes_list_element { + __be32 attr_page; + __be32 attr_id; + u8 reserved[6]; + __be16 attr_bytes; /* valid bytes at attr_val without padding */ + u8 attr_val[0]; +} __packed; + +enum { + OSDv1_ATTRIBUTES_ELEM_ALIGN = 1, + OSD_ATTRIBUTES_ELEM_ALIGN = 8, +}; + +enum { + OSD_ATTR_LIST_ALL_PAGES = 0xFFFFFFFF, + OSD_ATTR_LIST_ALL_IN_PAGE = 0xFFFFFFFF, +}; + +static inline unsigned osdv1_attr_list_elem_size(unsigned len) +{ + return ALIGN(len + sizeof(struct osdv1_attributes_list_element), + OSDv1_ATTRIBUTES_ELEM_ALIGN); +} + +static inline unsigned osdv2_attr_list_elem_size(unsigned len) +{ + return ALIGN(len + sizeof(struct osdv2_attributes_list_element), + OSD_ATTRIBUTES_ELEM_ALIGN); +} + +/* + * osd2r03: 7.1.3 OSD attributes lists (Table 184) — List type values + */ +enum osd_attr_list_types { + OSD_ATTR_LIST_GET = 0x1, /* descriptors only */ + OSD_ATTR_LIST_SET_RETRIEVE = 0x9, /*descriptors/values variable-length*/ + OSD_V2_ATTR_LIST_MULTIPLE = 0xE, /* ver2, Multiple Objects lists*/ + OSD_V1_ATTR_LIST_CREATE_MULTIPLE = 0xF,/*ver1, used by create_multple*/ +}; + +/* osd2r03: 7.1.3.4 Multi-object retrieved attributes format */ +struct osd_attributes_list_multi_header { + __be64 object_id; + u8 object_type; /* object_type enum below */ + u8 reserved[5]; + __be16 list_bytes; + /* followed by struct osd_attributes_list_element's */ +}; + +struct osdv1_attributes_list_header { + u8 type; /* low 4-bit only */ + u8 pad; + __be16 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 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 + */ +enum { + OSD_OBJ_ID_LIST_PAR = 0x1, /* V1-only. Not used in V2 */ + OSD_OBJ_ID_LIST_LSTCHG = 0x2, +}; + +/* + * osd2r03: 6.15.2 LIST command parameter data + * (Also for LIST COLLECTION) + */ +struct osd_obj_id_list { + __be64 list_bytes; /* bytes in list excluding list_bytes (-8) */ + __be64 continuation_id; + __be32 list_identifier; + u8 pad[3]; + u8 root_lstchg; + __be64 object_ids[0]; +} __packed; + +static inline bool osd_is_obj_list_done(struct osd_obj_id_list *list, + bool *is_changed) +{ + *is_changed = (0 != (list->root_lstchg & OSD_OBJ_ID_LIST_LSTCHG)); + return 0 != list->continuation_id; +} + +/* + * osd2r03: 4.12.4.5 The ALLDATA security method + */ +struct osd_data_out_integrity_info { + __be64 data_bytes; + __be64 set_attributes_bytes; + __be64 get_attributes_bytes; + __u8 integrity_check_value[OSD_CRYPTO_KEYID_SIZE]; +} __packed; + +/* Same osd_data_out_integrity_info is used for OSD2/OSD1. The only difference + * Is the sizeof the structure since in OSD1 the last array is smaller. Use + * below for version independent handling of this structure + */ +static inline int osd_data_out_integrity_info_sizeof(bool is_ver1) +{ + return sizeof(struct osd_data_out_integrity_info) - + (is_ver1 * (OSDv2_CRYPTO_KEYID_SIZE - OSDv1_CRYPTO_KEYID_SIZE)); +} + +struct osd_data_in_integrity_info { + __be64 data_bytes; + __be64 retrieved_attributes_bytes; + __u8 integrity_check_value[OSD_CRYPTO_KEYID_SIZE]; +} __packed; + +/* Same osd_data_in_integrity_info is used for OSD2/OSD1. The only difference + * Is the sizeof the structure since in OSD1 the last array is smaller. Use + * below for version independent handling of this structure + */ +static inline int osd_data_in_integrity_info_sizeof(bool is_ver1) +{ + return sizeof(struct osd_data_in_integrity_info) - + (is_ver1 * (OSDv2_CRYPTO_KEYID_SIZE - OSDv1_CRYPTO_KEYID_SIZE)); +} + +struct osd_timestamp { + u8 time[6]; /* number of milliseconds since 1/1/1970 UT (big endian) */ +} __packed; +/* FIXME: define helper functions to convert to/from osd time format */ + +/* + * Capability & Security definitions + * osd2r03: 4.11.2.2 Capability format + * osd2r03: 5.2.8 Security parameters + */ + +struct osd_key_identifier { + u8 id[7]; /* if you know why 7 please email ooo@electrozaur.com */ +} __packed; + +/* for osd_capability.format */ +enum { + OSD_SEC_CAP_FORMAT_NO_CAPS = 0, + OSD_SEC_CAP_FORMAT_VER1 = 1, + OSD_SEC_CAP_FORMAT_VER2 = 2, +}; + +/* security_method */ +enum { + OSD_SEC_NOSEC = 0, + OSD_SEC_CAPKEY = 1, + OSD_SEC_CMDRSP = 2, + OSD_SEC_ALLDATA = 3, +}; + +enum object_type { + OSD_SEC_OBJ_ROOT = 0x1, + OSD_SEC_OBJ_PARTITION = 0x2, + OSD_SEC_OBJ_COLLECTION = 0x40, + OSD_SEC_OBJ_USER = 0x80, +}; + +enum osd_capability_bit_masks { + OSD_SEC_CAP_APPEND = BIT(0), + OSD_SEC_CAP_OBJ_MGMT = BIT(1), + OSD_SEC_CAP_REMOVE = BIT(2), + OSD_SEC_CAP_CREATE = BIT(3), + OSD_SEC_CAP_SET_ATTR = BIT(4), + OSD_SEC_CAP_GET_ATTR = BIT(5), + OSD_SEC_CAP_WRITE = BIT(6), + OSD_SEC_CAP_READ = BIT(7), + + OSD_SEC_CAP_NONE1 = BIT(8), + OSD_SEC_CAP_NONE2 = BIT(9), + OSD_SEC_GBL_REM = BIT(10), /*v2 only*/ + OSD_SEC_CAP_QUERY = BIT(11), /*v2 only*/ + OSD_SEC_CAP_M_OBJECT = BIT(12), /*v2 only*/ + OSD_SEC_CAP_POL_SEC = BIT(13), + OSD_SEC_CAP_GLOBAL = BIT(14), + OSD_SEC_CAP_DEV_MGMT = BIT(15), +}; + +/* for object_descriptor_type (hi nibble used) */ +enum { + OSD_SEC_OBJ_DESC_NONE = 0, /* Not allowed */ + OSD_SEC_OBJ_DESC_OBJ = 1 << 4, /* v1: also collection */ + OSD_SEC_OBJ_DESC_PAR = 2 << 4, /* also root */ + OSD_SEC_OBJ_DESC_COL = 3 << 4, /* v2 only */ +}; + +/* (osd-r10:4.9.2.2) + * osd2r03:4.11.2.2 Capability format + */ +struct osd_capability_head { + u8 format; /* low nibble */ + u8 integrity_algorithm__key_version; /* MAKE_BYTE(integ_alg, key_ver) */ + u8 security_method; + u8 reserved1; +/*04*/ struct osd_timestamp expiration_time; +/*10*/ u8 audit[20]; +/*30*/ u8 discriminator[12]; +/*42*/ struct osd_timestamp object_created_time; +/*48*/ u8 object_type; +/*49*/ u8 permissions_bit_mask[5]; +/*54*/ u8 reserved2; +/*55*/ u8 object_descriptor_type; /* high nibble */ +} __packed; + +/*56 v1*/ +struct osdv1_cap_object_descriptor { + union { + struct { +/*56*/ __be32 policy_access_tag; +/*60*/ __be64 allowed_partition_id; +/*68*/ __be64 allowed_object_id; +/*76*/ __be32 reserved; + } __packed obj_desc; + +/*56*/ u8 object_descriptor[24]; + }; +} __packed; +/*80 v1*/ + +/*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; +} __packed; + +/** + * osd_sec_set_caps - set cap-bits into the capabilities header + * + * @cap: The osd_capability_head to set cap bits to. + * @bit_mask: Use an ORed list of enum osd_capability_bit_masks values + * + * permissions_bit_mask is unaligned use below to set into caps + * in a version independent way + */ +static inline void osd_sec_set_caps(struct osd_capability_head *cap, + u16 bit_mask) +{ + /* + *Note: The bits above are defined LE order this is because this way + * they can grow in the future to more then 16, and still retain + * there constant values. + */ + put_unaligned_le16(bit_mask, &cap->permissions_bit_mask); +} + +/* osd2r05a sec 5.3: CDB continuation segment formats */ +enum osd_continuation_segment_format { + CDB_CONTINUATION_FORMAT_V2 = 0x01, +}; + +struct osd_continuation_segment_header { + u8 format; + u8 reserved1; + __be16 service_action; + __be32 reserved2; + u8 integrity_check[OSDv2_CRYPTO_KEYID_SIZE]; +} __packed; + +/* osd2r05a sec 5.4.1: CDB continuation descriptors */ +enum osd_continuation_descriptor_type { + NO_MORE_DESCRIPTORS = 0x0000, + SCATTER_GATHER_LIST = 0x0001, + QUERY_LIST = 0x0002, + USER_OBJECT = 0x0003, + COPY_USER_OBJECT_SOURCE = 0x0101, + EXTENSION_CAPABILITIES = 0xFFEE +}; + +struct osd_continuation_descriptor_header { + __be16 type; + u8 reserved; + u8 pad_length; + __be32 length; +} __packed; + + +/* osd2r05a sec 5.4.2: Scatter/gather list */ +struct osd_sg_list_entry { + __be64 offset; + __be64 len; +}; + +struct osd_sg_continuation_descriptor { + struct osd_continuation_descriptor_header hdr; + struct osd_sg_list_entry entries[]; +}; + +#endif /* ndef __OSD_PROTOCOL_H__ */ |