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osd_protocol.h
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/* * 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__ */