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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 | /* SPDX-License-Identifier: GPL-2.0-or-later */ /* drbd.h Kernel module for 2.6.x Kernels This file is part of DRBD by Philipp Reisner and Lars Ellenberg. Copyright (C) 2001-2008, LINBIT Information Technologies GmbH. Copyright (C) 2001-2008, Philipp Reisner <philipp.reisner@linbit.com>. Copyright (C) 2001-2008, Lars Ellenberg <lars.ellenberg@linbit.com>. */ #ifndef DRBD_H #define DRBD_H #include <asm/types.h> #ifdef __KERNEL__ #include <linux/types.h> #include <asm/byteorder.h> #else #include <sys/types.h> #include <sys/wait.h> #include <limits.h> /* Although the Linux source code makes a difference between generic endianness and the bitfields' endianness, there is no architecture as of Linux-2.6.24-rc4 where the bitfields' endianness does not match the generic endianness. */ #if __BYTE_ORDER == __LITTLE_ENDIAN #define __LITTLE_ENDIAN_BITFIELD #elif __BYTE_ORDER == __BIG_ENDIAN #define __BIG_ENDIAN_BITFIELD #else # error "sorry, weird endianness on this box" #endif #endif extern const char *drbd_buildtag(void); #define REL_VERSION "8.4.11" #define API_VERSION 1 #define PRO_VERSION_MIN 86 #define PRO_VERSION_MAX 101 enum drbd_io_error_p { EP_PASS_ON, /* FIXME should the better be named "Ignore"? */ EP_CALL_HELPER, EP_DETACH }; enum drbd_fencing_p { FP_NOT_AVAIL = -1, /* Not a policy */ FP_DONT_CARE = 0, FP_RESOURCE, FP_STONITH }; enum drbd_disconnect_p { DP_RECONNECT, DP_DROP_NET_CONF, DP_FREEZE_IO }; enum drbd_after_sb_p { ASB_DISCONNECT, ASB_DISCARD_YOUNGER_PRI, ASB_DISCARD_OLDER_PRI, ASB_DISCARD_ZERO_CHG, ASB_DISCARD_LEAST_CHG, ASB_DISCARD_LOCAL, ASB_DISCARD_REMOTE, ASB_CONSENSUS, ASB_DISCARD_SECONDARY, ASB_CALL_HELPER, ASB_VIOLENTLY }; enum drbd_on_no_data { OND_IO_ERROR, OND_SUSPEND_IO }; enum drbd_on_congestion { OC_BLOCK, OC_PULL_AHEAD, OC_DISCONNECT, }; enum drbd_read_balancing { RB_PREFER_LOCAL, RB_PREFER_REMOTE, RB_ROUND_ROBIN, RB_LEAST_PENDING, RB_CONGESTED_REMOTE, RB_32K_STRIPING, RB_64K_STRIPING, RB_128K_STRIPING, RB_256K_STRIPING, RB_512K_STRIPING, RB_1M_STRIPING, }; /* KEEP the order, do not delete or insert. Only append. */ enum drbd_ret_code { ERR_CODE_BASE = 100, NO_ERROR = 101, ERR_LOCAL_ADDR = 102, ERR_PEER_ADDR = 103, ERR_OPEN_DISK = 104, ERR_OPEN_MD_DISK = 105, ERR_DISK_NOT_BDEV = 107, ERR_MD_NOT_BDEV = 108, ERR_DISK_TOO_SMALL = 111, ERR_MD_DISK_TOO_SMALL = 112, ERR_BDCLAIM_DISK = 114, ERR_BDCLAIM_MD_DISK = 115, ERR_MD_IDX_INVALID = 116, ERR_IO_MD_DISK = 118, ERR_MD_INVALID = 119, ERR_AUTH_ALG = 120, ERR_AUTH_ALG_ND = 121, ERR_NOMEM = 122, ERR_DISCARD_IMPOSSIBLE = 123, ERR_DISK_CONFIGURED = 124, ERR_NET_CONFIGURED = 125, ERR_MANDATORY_TAG = 126, ERR_MINOR_INVALID = 127, ERR_INTR = 129, /* EINTR */ ERR_RESIZE_RESYNC = 130, ERR_NO_PRIMARY = 131, ERR_RESYNC_AFTER = 132, ERR_RESYNC_AFTER_CYCLE = 133, ERR_PAUSE_IS_SET = 134, ERR_PAUSE_IS_CLEAR = 135, ERR_PACKET_NR = 137, ERR_NO_DISK = 138, ERR_NOT_PROTO_C = 139, ERR_NOMEM_BITMAP = 140, ERR_INTEGRITY_ALG = 141, /* DRBD 8.2 only */ ERR_INTEGRITY_ALG_ND = 142, /* DRBD 8.2 only */ ERR_CPU_MASK_PARSE = 143, /* DRBD 8.2 only */ ERR_CSUMS_ALG = 144, /* DRBD 8.2 only */ ERR_CSUMS_ALG_ND = 145, /* DRBD 8.2 only */ ERR_VERIFY_ALG = 146, /* DRBD 8.2 only */ ERR_VERIFY_ALG_ND = 147, /* DRBD 8.2 only */ ERR_CSUMS_RESYNC_RUNNING= 148, /* DRBD 8.2 only */ ERR_VERIFY_RUNNING = 149, /* DRBD 8.2 only */ ERR_DATA_NOT_CURRENT = 150, ERR_CONNECTED = 151, /* DRBD 8.3 only */ ERR_PERM = 152, ERR_NEED_APV_93 = 153, ERR_STONITH_AND_PROT_A = 154, ERR_CONG_NOT_PROTO_A = 155, ERR_PIC_AFTER_DEP = 156, ERR_PIC_PEER_DEP = 157, ERR_RES_NOT_KNOWN = 158, ERR_RES_IN_USE = 159, ERR_MINOR_CONFIGURED = 160, ERR_MINOR_OR_VOLUME_EXISTS = 161, ERR_INVALID_REQUEST = 162, ERR_NEED_APV_100 = 163, ERR_NEED_ALLOW_TWO_PRI = 164, ERR_MD_UNCLEAN = 165, ERR_MD_LAYOUT_CONNECTED = 166, ERR_MD_LAYOUT_TOO_BIG = 167, ERR_MD_LAYOUT_TOO_SMALL = 168, ERR_MD_LAYOUT_NO_FIT = 169, ERR_IMPLICIT_SHRINK = 170, /* insert new ones above this line */ AFTER_LAST_ERR_CODE }; #define DRBD_PROT_A 1 #define DRBD_PROT_B 2 #define DRBD_PROT_C 3 enum drbd_role { R_UNKNOWN = 0, R_PRIMARY = 1, /* role */ R_SECONDARY = 2, /* role */ R_MASK = 3, }; /* The order of these constants is important. * The lower ones (<C_WF_REPORT_PARAMS) indicate * that there is no socket! * >=C_WF_REPORT_PARAMS ==> There is a socket */ enum drbd_conns { C_STANDALONE, C_DISCONNECTING, /* Temporal state on the way to StandAlone. */ C_UNCONNECTED, /* >= C_UNCONNECTED -> inc_net() succeeds */ /* These temporal states are all used on the way * from >= C_CONNECTED to Unconnected. * The 'disconnect reason' states * I do not allow to change between them. */ C_TIMEOUT, C_BROKEN_PIPE, C_NETWORK_FAILURE, C_PROTOCOL_ERROR, C_TEAR_DOWN, C_WF_CONNECTION, C_WF_REPORT_PARAMS, /* we have a socket */ C_CONNECTED, /* we have introduced each other */ C_STARTING_SYNC_S, /* starting full sync by admin request. */ C_STARTING_SYNC_T, /* starting full sync by admin request. */ C_WF_BITMAP_S, C_WF_BITMAP_T, C_WF_SYNC_UUID, /* All SyncStates are tested with this comparison * xx >= C_SYNC_SOURCE && xx <= C_PAUSED_SYNC_T */ C_SYNC_SOURCE, C_SYNC_TARGET, C_VERIFY_S, C_VERIFY_T, C_PAUSED_SYNC_S, C_PAUSED_SYNC_T, C_AHEAD, C_BEHIND, C_MASK = 31 }; enum drbd_disk_state { D_DISKLESS, D_ATTACHING, /* In the process of reading the meta-data */ D_FAILED, /* Becomes D_DISKLESS as soon as we told it the peer */ /* when >= D_FAILED it is legal to access mdev->ldev */ D_NEGOTIATING, /* Late attaching state, we need to talk to the peer */ D_INCONSISTENT, D_OUTDATED, D_UNKNOWN, /* Only used for the peer, never for myself */ D_CONSISTENT, /* Might be D_OUTDATED, might be D_UP_TO_DATE ... */ D_UP_TO_DATE, /* Only this disk state allows applications' IO ! */ D_MASK = 15 }; union drbd_state { /* According to gcc's docs is the ... * The order of allocation of bit-fields within a unit (C90 6.5.2.1, C99 6.7.2.1). * Determined by ABI. * pointed out by Maxim Uvarov q<muvarov@ru.mvista.com> * even though we transmit as "cpu_to_be32(state)", * the offsets of the bitfields still need to be swapped * on different endianness. */ struct { #if defined(__LITTLE_ENDIAN_BITFIELD) unsigned role:2 ; /* 3/4 primary/secondary/unknown */ unsigned peer:2 ; /* 3/4 primary/secondary/unknown */ unsigned conn:5 ; /* 17/32 cstates */ unsigned disk:4 ; /* 8/16 from D_DISKLESS to D_UP_TO_DATE */ unsigned pdsk:4 ; /* 8/16 from D_DISKLESS to D_UP_TO_DATE */ unsigned susp:1 ; /* 2/2 IO suspended no/yes (by user) */ unsigned aftr_isp:1 ; /* isp .. imposed sync pause */ unsigned peer_isp:1 ; unsigned user_isp:1 ; unsigned susp_nod:1 ; /* IO suspended because no data */ unsigned susp_fen:1 ; /* IO suspended because fence peer handler runs*/ unsigned _pad:9; /* 0 unused */ #elif defined(__BIG_ENDIAN_BITFIELD) unsigned _pad:9; unsigned susp_fen:1 ; unsigned susp_nod:1 ; unsigned user_isp:1 ; unsigned peer_isp:1 ; unsigned aftr_isp:1 ; /* isp .. imposed sync pause */ unsigned susp:1 ; /* 2/2 IO suspended no/yes */ unsigned pdsk:4 ; /* 8/16 from D_DISKLESS to D_UP_TO_DATE */ unsigned disk:4 ; /* 8/16 from D_DISKLESS to D_UP_TO_DATE */ unsigned conn:5 ; /* 17/32 cstates */ unsigned peer:2 ; /* 3/4 primary/secondary/unknown */ unsigned role:2 ; /* 3/4 primary/secondary/unknown */ #else # error "this endianness is not supported" #endif }; unsigned int i; }; enum drbd_state_rv { SS_CW_NO_NEED = 4, SS_CW_SUCCESS = 3, SS_NOTHING_TO_DO = 2, SS_SUCCESS = 1, SS_UNKNOWN_ERROR = 0, /* Used to sleep longer in _drbd_request_state */ SS_TWO_PRIMARIES = -1, SS_NO_UP_TO_DATE_DISK = -2, SS_NO_LOCAL_DISK = -4, SS_NO_REMOTE_DISK = -5, SS_CONNECTED_OUTDATES = -6, SS_PRIMARY_NOP = -7, SS_RESYNC_RUNNING = -8, SS_ALREADY_STANDALONE = -9, SS_CW_FAILED_BY_PEER = -10, SS_IS_DISKLESS = -11, SS_DEVICE_IN_USE = -12, SS_NO_NET_CONFIG = -13, SS_NO_VERIFY_ALG = -14, /* drbd-8.2 only */ SS_NEED_CONNECTION = -15, /* drbd-8.2 only */ SS_LOWER_THAN_OUTDATED = -16, SS_NOT_SUPPORTED = -17, /* drbd-8.2 only */ SS_IN_TRANSIENT_STATE = -18, /* Retry after the next state change */ SS_CONCURRENT_ST_CHG = -19, /* Concurrent cluster side state change! */ SS_O_VOL_PEER_PRI = -20, SS_OUTDATE_WO_CONN = -21, SS_AFTER_LAST_ERROR = -22, /* Keep this at bottom */ }; #define SHARED_SECRET_MAX 64 #define MDF_CONSISTENT (1 << 0) #define MDF_PRIMARY_IND (1 << 1) #define MDF_CONNECTED_IND (1 << 2) #define MDF_FULL_SYNC (1 << 3) #define MDF_WAS_UP_TO_DATE (1 << 4) #define MDF_PEER_OUT_DATED (1 << 5) #define MDF_CRASHED_PRIMARY (1 << 6) #define MDF_AL_CLEAN (1 << 7) #define MDF_AL_DISABLED (1 << 8) #define MAX_PEERS 32 enum drbd_uuid_index { UI_CURRENT, UI_BITMAP, UI_HISTORY_START, UI_HISTORY_END, UI_SIZE, /* nl-packet: number of dirty bits */ UI_FLAGS, /* nl-packet: flags */ UI_EXTENDED_SIZE /* Everything. */ }; #define HISTORY_UUIDS MAX_PEERS enum drbd_timeout_flag { UT_DEFAULT = 0, UT_DEGRADED = 1, UT_PEER_OUTDATED = 2, }; enum drbd_notification_type { NOTIFY_EXISTS, NOTIFY_CREATE, NOTIFY_CHANGE, NOTIFY_DESTROY, NOTIFY_CALL, NOTIFY_RESPONSE, NOTIFY_CONTINUES = 0x8000, NOTIFY_FLAGS = NOTIFY_CONTINUES, }; enum drbd_peer_state { P_INCONSISTENT = 3, P_OUTDATED = 4, P_DOWN = 5, P_PRIMARY = 6, P_FENCING = 7, }; #define UUID_JUST_CREATED ((__u64)4) enum write_ordering_e { WO_NONE, WO_DRAIN_IO, WO_BDEV_FLUSH, WO_BIO_BARRIER }; /* magic numbers used in meta data and network packets */ #define DRBD_MAGIC 0x83740267 #define DRBD_MAGIC_BIG 0x835a #define DRBD_MAGIC_100 0x8620ec20 #define DRBD_MD_MAGIC_07 (DRBD_MAGIC+3) #define DRBD_MD_MAGIC_08 (DRBD_MAGIC+4) #define DRBD_MD_MAGIC_84_UNCLEAN (DRBD_MAGIC+5) /* how I came up with this magic? * base64 decode "actlog==" ;) */ #define DRBD_AL_MAGIC 0x69cb65a2 /* these are of type "int" */ #define DRBD_MD_INDEX_INTERNAL -1 #define DRBD_MD_INDEX_FLEX_EXT -2 #define DRBD_MD_INDEX_FLEX_INT -3 #define DRBD_CPU_MASK_SIZE 32 #endif |