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26#ifndef DRBD_H
27#define DRBD_H
28#include <asm/types.h>
29
30#ifdef __KERNEL__
31#include <linux/types.h>
32#include <asm/byteorder.h>
33#else
34#include <sys/types.h>
35#include <sys/wait.h>
36#include <limits.h>
37
38
39
40
41
42
43#if __BYTE_ORDER == __LITTLE_ENDIAN
44#define __LITTLE_ENDIAN_BITFIELD
45#elif __BYTE_ORDER == __BIG_ENDIAN
46#define __BIG_ENDIAN_BITFIELD
47#else
48# error "sorry, weird endianness on this box"
49#endif
50
51#endif
52
53extern const char *drbd_buildtag(void);
54#define REL_VERSION "8.4.11"
55#define API_VERSION 1
56#define PRO_VERSION_MIN 86
57#define PRO_VERSION_MAX 101
58
59
60enum drbd_io_error_p {
61 EP_PASS_ON,
62 EP_CALL_HELPER,
63 EP_DETACH
64};
65
66enum drbd_fencing_p {
67 FP_NOT_AVAIL = -1,
68 FP_DONT_CARE = 0,
69 FP_RESOURCE,
70 FP_STONITH
71};
72
73enum drbd_disconnect_p {
74 DP_RECONNECT,
75 DP_DROP_NET_CONF,
76 DP_FREEZE_IO
77};
78
79enum drbd_after_sb_p {
80 ASB_DISCONNECT,
81 ASB_DISCARD_YOUNGER_PRI,
82 ASB_DISCARD_OLDER_PRI,
83 ASB_DISCARD_ZERO_CHG,
84 ASB_DISCARD_LEAST_CHG,
85 ASB_DISCARD_LOCAL,
86 ASB_DISCARD_REMOTE,
87 ASB_CONSENSUS,
88 ASB_DISCARD_SECONDARY,
89 ASB_CALL_HELPER,
90 ASB_VIOLENTLY
91};
92
93enum drbd_on_no_data {
94 OND_IO_ERROR,
95 OND_SUSPEND_IO
96};
97
98enum drbd_on_congestion {
99 OC_BLOCK,
100 OC_PULL_AHEAD,
101 OC_DISCONNECT,
102};
103
104enum drbd_read_balancing {
105 RB_PREFER_LOCAL,
106 RB_PREFER_REMOTE,
107 RB_ROUND_ROBIN,
108 RB_LEAST_PENDING,
109 RB_CONGESTED_REMOTE,
110 RB_32K_STRIPING,
111 RB_64K_STRIPING,
112 RB_128K_STRIPING,
113 RB_256K_STRIPING,
114 RB_512K_STRIPING,
115 RB_1M_STRIPING,
116};
117
118
119enum drbd_ret_code {
120 ERR_CODE_BASE = 100,
121 NO_ERROR = 101,
122 ERR_LOCAL_ADDR = 102,
123 ERR_PEER_ADDR = 103,
124 ERR_OPEN_DISK = 104,
125 ERR_OPEN_MD_DISK = 105,
126 ERR_DISK_NOT_BDEV = 107,
127 ERR_MD_NOT_BDEV = 108,
128 ERR_DISK_TOO_SMALL = 111,
129 ERR_MD_DISK_TOO_SMALL = 112,
130 ERR_BDCLAIM_DISK = 114,
131 ERR_BDCLAIM_MD_DISK = 115,
132 ERR_MD_IDX_INVALID = 116,
133 ERR_IO_MD_DISK = 118,
134 ERR_MD_INVALID = 119,
135 ERR_AUTH_ALG = 120,
136 ERR_AUTH_ALG_ND = 121,
137 ERR_NOMEM = 122,
138 ERR_DISCARD_IMPOSSIBLE = 123,
139 ERR_DISK_CONFIGURED = 124,
140 ERR_NET_CONFIGURED = 125,
141 ERR_MANDATORY_TAG = 126,
142 ERR_MINOR_INVALID = 127,
143 ERR_INTR = 129,
144 ERR_RESIZE_RESYNC = 130,
145 ERR_NO_PRIMARY = 131,
146 ERR_RESYNC_AFTER = 132,
147 ERR_RESYNC_AFTER_CYCLE = 133,
148 ERR_PAUSE_IS_SET = 134,
149 ERR_PAUSE_IS_CLEAR = 135,
150 ERR_PACKET_NR = 137,
151 ERR_NO_DISK = 138,
152 ERR_NOT_PROTO_C = 139,
153 ERR_NOMEM_BITMAP = 140,
154 ERR_INTEGRITY_ALG = 141,
155 ERR_INTEGRITY_ALG_ND = 142,
156 ERR_CPU_MASK_PARSE = 143,
157 ERR_CSUMS_ALG = 144,
158 ERR_CSUMS_ALG_ND = 145,
159 ERR_VERIFY_ALG = 146,
160 ERR_VERIFY_ALG_ND = 147,
161 ERR_CSUMS_RESYNC_RUNNING= 148,
162 ERR_VERIFY_RUNNING = 149,
163 ERR_DATA_NOT_CURRENT = 150,
164 ERR_CONNECTED = 151,
165 ERR_PERM = 152,
166 ERR_NEED_APV_93 = 153,
167 ERR_STONITH_AND_PROT_A = 154,
168 ERR_CONG_NOT_PROTO_A = 155,
169 ERR_PIC_AFTER_DEP = 156,
170 ERR_PIC_PEER_DEP = 157,
171 ERR_RES_NOT_KNOWN = 158,
172 ERR_RES_IN_USE = 159,
173 ERR_MINOR_CONFIGURED = 160,
174 ERR_MINOR_OR_VOLUME_EXISTS = 161,
175 ERR_INVALID_REQUEST = 162,
176 ERR_NEED_APV_100 = 163,
177 ERR_NEED_ALLOW_TWO_PRI = 164,
178 ERR_MD_UNCLEAN = 165,
179 ERR_MD_LAYOUT_CONNECTED = 166,
180 ERR_MD_LAYOUT_TOO_BIG = 167,
181 ERR_MD_LAYOUT_TOO_SMALL = 168,
182 ERR_MD_LAYOUT_NO_FIT = 169,
183 ERR_IMPLICIT_SHRINK = 170,
184
185 AFTER_LAST_ERR_CODE
186};
187
188#define DRBD_PROT_A 1
189#define DRBD_PROT_B 2
190#define DRBD_PROT_C 3
191
192enum drbd_role {
193 R_UNKNOWN = 0,
194 R_PRIMARY = 1,
195 R_SECONDARY = 2,
196 R_MASK = 3,
197};
198
199
200
201
202
203
204enum drbd_conns {
205 C_STANDALONE,
206 C_DISCONNECTING,
207 C_UNCONNECTED,
208
209
210
211
212
213 C_TIMEOUT,
214 C_BROKEN_PIPE,
215 C_NETWORK_FAILURE,
216 C_PROTOCOL_ERROR,
217 C_TEAR_DOWN,
218
219 C_WF_CONNECTION,
220 C_WF_REPORT_PARAMS,
221 C_CONNECTED,
222 C_STARTING_SYNC_S,
223 C_STARTING_SYNC_T,
224 C_WF_BITMAP_S,
225 C_WF_BITMAP_T,
226 C_WF_SYNC_UUID,
227
228
229
230 C_SYNC_SOURCE,
231 C_SYNC_TARGET,
232 C_VERIFY_S,
233 C_VERIFY_T,
234 C_PAUSED_SYNC_S,
235 C_PAUSED_SYNC_T,
236
237 C_AHEAD,
238 C_BEHIND,
239
240 C_MASK = 31
241};
242
243enum drbd_disk_state {
244 D_DISKLESS,
245 D_ATTACHING,
246 D_FAILED,
247
248 D_NEGOTIATING,
249 D_INCONSISTENT,
250 D_OUTDATED,
251 D_UNKNOWN,
252 D_CONSISTENT,
253 D_UP_TO_DATE,
254 D_MASK = 15
255};
256
257union drbd_state {
258
259
260
261
262
263
264
265
266 struct {
267#if defined(__LITTLE_ENDIAN_BITFIELD)
268 unsigned role:2 ;
269 unsigned peer:2 ;
270 unsigned conn:5 ;
271 unsigned disk:4 ;
272 unsigned pdsk:4 ;
273 unsigned susp:1 ;
274 unsigned aftr_isp:1 ;
275 unsigned peer_isp:1 ;
276 unsigned user_isp:1 ;
277 unsigned susp_nod:1 ;
278 unsigned susp_fen:1 ;
279 unsigned _pad:9;
280#elif defined(__BIG_ENDIAN_BITFIELD)
281 unsigned _pad:9;
282 unsigned susp_fen:1 ;
283 unsigned susp_nod:1 ;
284 unsigned user_isp:1 ;
285 unsigned peer_isp:1 ;
286 unsigned aftr_isp:1 ;
287 unsigned susp:1 ;
288 unsigned pdsk:4 ;
289 unsigned disk:4 ;
290 unsigned conn:5 ;
291 unsigned peer:2 ;
292 unsigned role:2 ;
293#else
294# error "this endianness is not supported"
295#endif
296 };
297 unsigned int i;
298};
299
300enum drbd_state_rv {
301 SS_CW_NO_NEED = 4,
302 SS_CW_SUCCESS = 3,
303 SS_NOTHING_TO_DO = 2,
304 SS_SUCCESS = 1,
305 SS_UNKNOWN_ERROR = 0,
306 SS_TWO_PRIMARIES = -1,
307 SS_NO_UP_TO_DATE_DISK = -2,
308 SS_NO_LOCAL_DISK = -4,
309 SS_NO_REMOTE_DISK = -5,
310 SS_CONNECTED_OUTDATES = -6,
311 SS_PRIMARY_NOP = -7,
312 SS_RESYNC_RUNNING = -8,
313 SS_ALREADY_STANDALONE = -9,
314 SS_CW_FAILED_BY_PEER = -10,
315 SS_IS_DISKLESS = -11,
316 SS_DEVICE_IN_USE = -12,
317 SS_NO_NET_CONFIG = -13,
318 SS_NO_VERIFY_ALG = -14,
319 SS_NEED_CONNECTION = -15,
320 SS_LOWER_THAN_OUTDATED = -16,
321 SS_NOT_SUPPORTED = -17,
322 SS_IN_TRANSIENT_STATE = -18,
323 SS_CONCURRENT_ST_CHG = -19,
324 SS_O_VOL_PEER_PRI = -20,
325 SS_OUTDATE_WO_CONN = -21,
326 SS_AFTER_LAST_ERROR = -22,
327};
328
329#define SHARED_SECRET_MAX 64
330
331#define MDF_CONSISTENT (1 << 0)
332#define MDF_PRIMARY_IND (1 << 1)
333#define MDF_CONNECTED_IND (1 << 2)
334#define MDF_FULL_SYNC (1 << 3)
335#define MDF_WAS_UP_TO_DATE (1 << 4)
336#define MDF_PEER_OUT_DATED (1 << 5)
337#define MDF_CRASHED_PRIMARY (1 << 6)
338#define MDF_AL_CLEAN (1 << 7)
339#define MDF_AL_DISABLED (1 << 8)
340
341#define MAX_PEERS 32
342
343enum drbd_uuid_index {
344 UI_CURRENT,
345 UI_BITMAP,
346 UI_HISTORY_START,
347 UI_HISTORY_END,
348 UI_SIZE,
349 UI_FLAGS,
350 UI_EXTENDED_SIZE
351};
352
353#define HISTORY_UUIDS MAX_PEERS
354
355enum drbd_timeout_flag {
356 UT_DEFAULT = 0,
357 UT_DEGRADED = 1,
358 UT_PEER_OUTDATED = 2,
359};
360
361enum drbd_notification_type {
362 NOTIFY_EXISTS,
363 NOTIFY_CREATE,
364 NOTIFY_CHANGE,
365 NOTIFY_DESTROY,
366 NOTIFY_CALL,
367 NOTIFY_RESPONSE,
368
369 NOTIFY_CONTINUES = 0x8000,
370 NOTIFY_FLAGS = NOTIFY_CONTINUES,
371};
372
373enum drbd_peer_state {
374 P_INCONSISTENT = 3,
375 P_OUTDATED = 4,
376 P_DOWN = 5,
377 P_PRIMARY = 6,
378 P_FENCING = 7,
379};
380
381#define UUID_JUST_CREATED ((__u64)4)
382
383enum write_ordering_e {
384 WO_NONE,
385 WO_DRAIN_IO,
386 WO_BDEV_FLUSH,
387 WO_BIO_BARRIER
388};
389
390
391#define DRBD_MAGIC 0x83740267
392#define DRBD_MAGIC_BIG 0x835a
393#define DRBD_MAGIC_100 0x8620ec20
394
395#define DRBD_MD_MAGIC_07 (DRBD_MAGIC+3)
396#define DRBD_MD_MAGIC_08 (DRBD_MAGIC+4)
397#define DRBD_MD_MAGIC_84_UNCLEAN (DRBD_MAGIC+5)
398
399
400
401
402#define DRBD_AL_MAGIC 0x69cb65a2
403
404
405#define DRBD_MD_INDEX_INTERNAL -1
406#define DRBD_MD_INDEX_FLEX_EXT -2
407#define DRBD_MD_INDEX_FLEX_INT -3
408
409#define DRBD_CPU_MASK_SIZE 32
410
411#endif
412