1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved. 23 * 24 * Copyright 2011 Nexenta Systems, Inc. All rights reserved. 25 */ 26 27 #ifndef _STMF_SBD_H 28 #define _STMF_SBD_H 29 30 #ifdef __cplusplus 31 extern "C" { 32 #endif 33 34 typedef stmf_status_t sbd_status_t; 35 extern char sbd_vendor_id[]; 36 extern char sbd_product_id[]; 37 extern char sbd_revision[]; 38 extern char *sbd_mgmt_url; 39 extern uint16_t sbd_mgmt_url_alloc_size; 40 extern krwlock_t sbd_global_prop_lock; 41 42 /* 43 * Error codes 44 */ 45 #define SBD_SUCCESS STMF_SUCCESS 46 #define SBD_FAILURE STMF_LU_FAILURE 47 48 #define SBD_ALREADY (SBD_FAILURE | STMF_FSC(1)) 49 #define SBD_NOT_SUPPORTED (SBD_FAILURE | STMF_FSC(2)) 50 #define SBD_META_CORRUPTED (SBD_FAILURE | STMF_FSC(3)) 51 #define SBD_INVALID_ARG (SBD_FAILURE | STMF_FSC(4)) 52 #define SBD_NOT_FOUND (SBD_FAILURE | STMF_FSC(5)) 53 #define SBD_ALLOC_FAILURE (SBD_FAILURE | STMF_FSC(6)) 54 #define SBD_FILEIO_FAILURE (SBD_FAILURE | STMF_FSC(7)) 55 #define SBD_IO_PAST_EOF (SBD_FAILURE | STMF_FSC(8)) 56 #define SBD_BUSY (SBD_FAILURE | STMF_FSC(9)) 57 58 #define SHARED_META_DATA_SIZE 65536 59 #define SBD_META_OFFSET 4096 60 #define SBD_MIN_LU_SIZE (1024 * 1024) 61 62 /* 63 * sms endianess 64 */ 65 #define SMS_BIG_ENDIAN 0x00 66 #define SMS_LITTLE_ENDIAN 0xFF 67 68 #ifdef _BIG_ENDIAN 69 #define SMS_DATA_ORDER SMS_BIG_ENDIAN 70 #else 71 #define SMS_DATA_ORDER SMS_LITTLE_ENDIAN 72 #endif 73 74 #define SBD_MAGIC 0x53554e5342444c55 75 76 #define SBD_VER_MAJOR 1 77 #define SBD_VER_MINOR 1 78 #define SBD_VER_SUBMINOR 0 79 80 #if 0 81 typedef struct sbd_meta_start { 82 uint64_t sm_magic; 83 uint64_t sm_meta_size; 84 uint64_t sm_meta_size_used; 85 uint64_t sm_rsvd1; /* Defaults to zero */ 86 uint64_t sm_rsvd2; 87 uint16_t sm_ver_major; 88 uint16_t sm_ver_minor; 89 uint16_t sm_ver_subminor; 90 uint8_t sm_flags; 91 uint8_t sm_chksum; 92 } sbd_meta_start_t; 93 #endif 94 95 typedef struct sm_section_hdr { 96 uint64_t sms_offset; /* Offset of this section */ 97 uint32_t sms_size; /* Includes the header and padding */ 98 uint16_t sms_id; /* Section identifier */ 99 uint8_t sms_data_order; /* 0x00 or 0xff */ 100 uint8_t sms_chksum; 101 } sm_section_hdr_t; 102 103 /* 104 * sbd meta section identifiers 105 */ 106 #define SMS_ID_LU_INFO_1_0 0 107 #define SMS_ID_LU_INFO_1_1 1 108 #define SMS_ID_PGR_INFO 2 109 #define SMS_ID_UNUSED 0x1000 110 111 typedef struct sbd_lu_info_1_0 { 112 sm_section_hdr_t sli_sms_header; 113 uint64_t sli_total_store_size; 114 uint64_t sli_total_meta_size; 115 uint64_t sli_lu_data_offset; 116 uint64_t sli_lu_data_size; 117 uint32_t sli_flags; 118 uint16_t sli_blocksize; 119 uint8_t sli_data_order; 120 uint8_t rsvd1; 121 uint8_t sli_lu_devid[20]; 122 uint32_t rsvd2; 123 } sbd_lu_info_1_0_t; 124 125 typedef struct sbd_lu_info_1_1 { 126 sm_section_hdr_t sli_sms_header; 127 uint32_t sli_flags; 128 char sli_rev[4]; 129 char sli_vid[8]; 130 char sli_pid[16]; 131 uint64_t sli_lu_size; /* Read capacity size */ 132 133 /* 134 * Essetially zfs volume name for zvols to verify that the 135 * metadata is coming in from the correct zvol and not from a 136 * clone. Has no meaning in any other case. 137 */ 138 uint64_t sli_meta_fname_offset; 139 140 /* 141 * Data filename or the media filename when the metadata is in 142 * a separate file. Its not needed if the metadata is shared 143 * with data as the user supplied name is the data filename. 144 */ 145 uint64_t sli_data_fname_offset; 146 uint64_t sli_serial_offset; 147 uint64_t sli_alias_offset; 148 uint8_t sli_data_blocksize_shift; 149 uint8_t sli_data_order; 150 uint8_t sli_serial_size; 151 uint8_t sli_rsvd1; 152 uint8_t sli_device_id[20]; 153 uint64_t sli_mgmt_url_offset; 154 uint8_t sli_rsvd2[248]; 155 156 /* 157 * In case there is no separate meta, sli_meta_fname_offset wont 158 * be valid. The same is true for zfs based metadata. The data_fname 159 * is the zvol. 160 */ 161 uint8_t sli_buf[8]; 162 } sbd_lu_info_1_1_t; 163 164 /* 165 * sli flags 166 */ 167 #define SLI_SEPARATE_META 0x0001 168 #define SLI_WRITE_PROTECTED 0x0002 169 #define SLI_VID_VALID 0x0004 170 #define SLI_PID_VALID 0x0008 171 #define SLI_REV_VALID 0x0010 172 #define SLI_META_FNAME_VALID 0x0020 173 #define SLI_DATA_FNAME_VALID 0x0040 174 #define SLI_SERIAL_VALID 0x0080 175 #define SLI_ALIAS_VALID 0x0100 176 #define SLI_WRITEBACK_CACHE_DISABLE 0x0200 177 #define SLI_ZFS_META 0x0400 178 #define SLI_MGMT_URL_VALID 0x0800 179 180 struct sbd_it_data; 181 182 typedef struct sbd_lu { 183 struct sbd_lu *sl_next; 184 stmf_lu_t *sl_lu; 185 uint32_t sl_alloc_size; 186 187 /* Current LU state */ 188 kmutex_t sl_lock; 189 uint32_t sl_flags; 190 uint8_t sl_trans_op; 191 uint8_t sl_state:7, 192 sl_state_not_acked:1; 193 194 char *sl_name; /* refers to meta or data */ 195 196 /* Metadata */ 197 kmutex_t sl_metadata_lock; 198 krwlock_t sl_access_state_lock; 199 char *sl_alias; 200 char *sl_meta_filename; /* If applicable */ 201 char *sl_mgmt_url; 202 vnode_t *sl_meta_vp; 203 vtype_t sl_meta_vtype; 204 uint8_t sl_device_id[20]; /* 4(hdr) + 16(GUID) */ 205 uint8_t sl_meta_blocksize_shift; /* Left shift multiplier */ 206 uint8_t sl_data_blocksize_shift; 207 uint8_t sl_data_fs_nbits; 208 uint8_t sl_serial_no_size; 209 uint64_t sl_total_meta_size; 210 uint64_t sl_meta_size_used; 211 uint8_t *sl_serial_no; /* optional */ 212 char sl_vendor_id[8]; 213 char sl_product_id[16]; 214 char sl_revision[4]; 215 uint32_t sl_data_fname_alloc_size; /* for an explicit alloc */ 216 uint16_t sl_alias_alloc_size; 217 uint16_t sl_mgmt_url_alloc_size; 218 uint8_t sl_serial_no_alloc_size; 219 uint8_t sl_access_state; 220 uint64_t sl_meta_offset; 221 222 /* zfs metadata */ 223 krwlock_t sl_zfs_meta_lock; 224 char *sl_zfs_meta; 225 minor_t sl_zvol_minor; /* for direct zvol calls */ 226 /* opaque handles for zvol direct calls */ 227 void *sl_zvol_minor_hdl; 228 void *sl_zvol_objset_hdl; 229 void *sl_zvol_zil_hdl; 230 void *sl_zvol_rl_hdl; 231 void *sl_zvol_dn_hdl; 232 233 /* Backing store */ 234 char *sl_data_filename; 235 vnode_t *sl_data_vp; 236 vtype_t sl_data_vtype; 237 uint64_t sl_total_data_size; 238 uint64_t sl_data_readable_size; /* read() fails after this */ 239 uint64_t sl_data_offset; /* After the metadata,if any */ 240 uint64_t sl_lu_size; /* READ CAPACITY size */ 241 uint64_t sl_blksize; /* used for zvols */ 242 uint64_t sl_max_xfer_len; /* used for zvols */ 243 244 struct sbd_it_data *sl_it_list; 245 struct sbd_pgr *sl_pgr; 246 uint64_t sl_rs_owner_session_id; 247 } sbd_lu_t; 248 249 /* 250 * sl_flags 251 */ 252 #define SL_LINKED 0x00000001 253 #define SL_META_OPENED 0x00000002 254 #define SL_REGISTERED 0x00000004 255 #define SL_META_NEEDS_FLUSH 0x00000008 256 #define SL_DATA_NEEDS_FLUSH 0x00000010 257 #define SL_VID_VALID 0x00000020 258 #define SL_PID_VALID 0x00000040 259 #define SL_REV_VALID 0x00000080 260 #define SL_WRITE_PROTECTED 0x00000100 261 #define SL_MEDIA_LOADED 0x00000200 262 #define SL_LU_HAS_SCSI2_RESERVATION 0x00000400 263 #define SL_WRITEBACK_CACHE_DISABLE 0x00000800 264 #define SL_SAVED_WRITE_CACHE_DISABLE 0x00001000 265 #define SL_MEDIUM_REMOVAL_PREVENTED 0x00002000 266 #define SL_NO_DATA_DKIOFLUSH 0x00004000 267 #define SL_SHARED_META 0x00008000 268 #define SL_ZFS_META 0x00010000 269 #define SL_WRITEBACK_CACHE_SET_UNSUPPORTED 0x00020000 270 #define SL_FLUSH_ON_DISABLED_WRITECACHE 0x00040000 271 #define SL_CALL_ZVOL 0x00080000 272 #define SL_UNMAP_ENABLED 0x00100000 273 274 /* 275 * sl_trans_op. LU is undergoing some transition and this field 276 * tells what kind of transition that is. 277 */ 278 #define SL_OP_NONE 0 279 #define SL_OP_CREATE_REGISTER_LU 1 280 #define SL_OP_IMPORT_LU 2 281 #define SL_OP_DELETE_LU 3 282 #define SL_OP_MODIFY_LU 4 283 #define SL_OP_LU_PROPS 5 284 285 sbd_status_t sbd_data_read(sbd_lu_t *sl, scsi_task_t *task, 286 uint64_t offset, uint64_t size, uint8_t *buf); 287 sbd_status_t sbd_data_write(sbd_lu_t *sl, scsi_task_t *task, 288 uint64_t offset, uint64_t size, uint8_t *buf); 289 stmf_status_t sbd_task_alloc(struct scsi_task *task); 290 void sbd_new_task(struct scsi_task *task, struct stmf_data_buf *initial_dbuf); 291 void sbd_dbuf_xfer_done(struct scsi_task *task, struct stmf_data_buf *dbuf); 292 void sbd_send_status_done(struct scsi_task *task); 293 void sbd_task_free(struct scsi_task *task); 294 stmf_status_t sbd_abort(struct stmf_lu *lu, int abort_cmd, void *arg, 295 uint32_t flags); 296 void sbd_ctl(struct stmf_lu *lu, int cmd, void *arg); 297 stmf_status_t sbd_info(uint32_t cmd, stmf_lu_t *lu, void *arg, uint8_t *buf, 298 uint32_t *bufsizep); 299 sbd_status_t sbd_write_lu_info(sbd_lu_t *sl); 300 sbd_status_t sbd_flush_data_cache(sbd_lu_t *sl, int fsync_done); 301 sbd_status_t sbd_wcd_set(int wcd, sbd_lu_t *sl); 302 void sbd_wcd_get(int *wcd, sbd_lu_t *sl); 303 int sbd_unmap(sbd_lu_t *, uint64_t, uint64_t); 304 305 #ifdef __cplusplus 306 } 307 #endif 308 309 #endif /* _STMF_SBD_H */ 310