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14 #ifndef DRBD_H
15 #define DRBD_H
16 #include <asm/types.h>
17
18 #ifdef __KERNEL__
19 #include <linux/types.h>
20 #include <asm/byteorder.h>
21 #else
22 #include <sys/types.h>
23 #include <sys/wait.h>
24 #include <limits.h>
25
26
27
28
29
30
31 #if __BYTE_ORDER == __LITTLE_ENDIAN
32 #define __LITTLE_ENDIAN_BITFIELD
33 #elif __BYTE_ORDER == __BIG_ENDIAN
34 #define __BIG_ENDIAN_BITFIELD
35 #else
36 # error "sorry, weird endianness on this box"
37 #endif
38
39 #endif
40
41 extern const char *drbd_buildtag(void);
42 #define REL_VERSION "8.4.11"
43 #define API_VERSION 1
44 #define PRO_VERSION_MIN 86
45 #define PRO_VERSION_MAX 101
46
47
48 enum drbd_io_error_p {
49 EP_PASS_ON,
50 EP_CALL_HELPER,
51 EP_DETACH
52 };
53
54 enum drbd_fencing_p {
55 FP_NOT_AVAIL = -1,
56 FP_DONT_CARE = 0,
57 FP_RESOURCE,
58 FP_STONITH
59 };
60
61 enum drbd_disconnect_p {
62 DP_RECONNECT,
63 DP_DROP_NET_CONF,
64 DP_FREEZE_IO
65 };
66
67 enum drbd_after_sb_p {
68 ASB_DISCONNECT,
69 ASB_DISCARD_YOUNGER_PRI,
70 ASB_DISCARD_OLDER_PRI,
71 ASB_DISCARD_ZERO_CHG,
72 ASB_DISCARD_LEAST_CHG,
73 ASB_DISCARD_LOCAL,
74 ASB_DISCARD_REMOTE,
75 ASB_CONSENSUS,
76 ASB_DISCARD_SECONDARY,
77 ASB_CALL_HELPER,
78 ASB_VIOLENTLY
79 };
80
81 enum drbd_on_no_data {
82 OND_IO_ERROR,
83 OND_SUSPEND_IO
84 };
85
86 enum drbd_on_congestion {
87 OC_BLOCK,
88 OC_PULL_AHEAD,
89 OC_DISCONNECT,
90 };
91
92 enum drbd_read_balancing {
93 RB_PREFER_LOCAL,
94 RB_PREFER_REMOTE,
95 RB_ROUND_ROBIN,
96 RB_LEAST_PENDING,
97 RB_CONGESTED_REMOTE,
98 RB_32K_STRIPING,
99 RB_64K_STRIPING,
100 RB_128K_STRIPING,
101 RB_256K_STRIPING,
102 RB_512K_STRIPING,
103 RB_1M_STRIPING,
104 };
105
106
107 enum drbd_ret_code {
108 ERR_CODE_BASE = 100,
109 NO_ERROR = 101,
110 ERR_LOCAL_ADDR = 102,
111 ERR_PEER_ADDR = 103,
112 ERR_OPEN_DISK = 104,
113 ERR_OPEN_MD_DISK = 105,
114 ERR_DISK_NOT_BDEV = 107,
115 ERR_MD_NOT_BDEV = 108,
116 ERR_DISK_TOO_SMALL = 111,
117 ERR_MD_DISK_TOO_SMALL = 112,
118 ERR_BDCLAIM_DISK = 114,
119 ERR_BDCLAIM_MD_DISK = 115,
120 ERR_MD_IDX_INVALID = 116,
121 ERR_IO_MD_DISK = 118,
122 ERR_MD_INVALID = 119,
123 ERR_AUTH_ALG = 120,
124 ERR_AUTH_ALG_ND = 121,
125 ERR_NOMEM = 122,
126 ERR_DISCARD_IMPOSSIBLE = 123,
127 ERR_DISK_CONFIGURED = 124,
128 ERR_NET_CONFIGURED = 125,
129 ERR_MANDATORY_TAG = 126,
130 ERR_MINOR_INVALID = 127,
131 ERR_INTR = 129,
132 ERR_RESIZE_RESYNC = 130,
133 ERR_NO_PRIMARY = 131,
134 ERR_RESYNC_AFTER = 132,
135 ERR_RESYNC_AFTER_CYCLE = 133,
136 ERR_PAUSE_IS_SET = 134,
137 ERR_PAUSE_IS_CLEAR = 135,
138 ERR_PACKET_NR = 137,
139 ERR_NO_DISK = 138,
140 ERR_NOT_PROTO_C = 139,
141 ERR_NOMEM_BITMAP = 140,
142 ERR_INTEGRITY_ALG = 141,
143 ERR_INTEGRITY_ALG_ND = 142,
144 ERR_CPU_MASK_PARSE = 143,
145 ERR_CSUMS_ALG = 144,
146 ERR_CSUMS_ALG_ND = 145,
147 ERR_VERIFY_ALG = 146,
148 ERR_VERIFY_ALG_ND = 147,
149 ERR_CSUMS_RESYNC_RUNNING= 148,
150 ERR_VERIFY_RUNNING = 149,
151 ERR_DATA_NOT_CURRENT = 150,
152 ERR_CONNECTED = 151,
153 ERR_PERM = 152,
154 ERR_NEED_APV_93 = 153,
155 ERR_STONITH_AND_PROT_A = 154,
156 ERR_CONG_NOT_PROTO_A = 155,
157 ERR_PIC_AFTER_DEP = 156,
158 ERR_PIC_PEER_DEP = 157,
159 ERR_RES_NOT_KNOWN = 158,
160 ERR_RES_IN_USE = 159,
161 ERR_MINOR_CONFIGURED = 160,
162 ERR_MINOR_OR_VOLUME_EXISTS = 161,
163 ERR_INVALID_REQUEST = 162,
164 ERR_NEED_APV_100 = 163,
165 ERR_NEED_ALLOW_TWO_PRI = 164,
166 ERR_MD_UNCLEAN = 165,
167 ERR_MD_LAYOUT_CONNECTED = 166,
168 ERR_MD_LAYOUT_TOO_BIG = 167,
169 ERR_MD_LAYOUT_TOO_SMALL = 168,
170 ERR_MD_LAYOUT_NO_FIT = 169,
171 ERR_IMPLICIT_SHRINK = 170,
172
173 AFTER_LAST_ERR_CODE
174 };
175
176 #define DRBD_PROT_A 1
177 #define DRBD_PROT_B 2
178 #define DRBD_PROT_C 3
179
180 enum drbd_role {
181 R_UNKNOWN = 0,
182 R_PRIMARY = 1,
183 R_SECONDARY = 2,
184 R_MASK = 3,
185 };
186
187
188
189
190
191
192 enum drbd_conns {
193 C_STANDALONE,
194 C_DISCONNECTING,
195 C_UNCONNECTED,
196
197
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199
200
201 C_TIMEOUT,
202 C_BROKEN_PIPE,
203 C_NETWORK_FAILURE,
204 C_PROTOCOL_ERROR,
205 C_TEAR_DOWN,
206
207 C_WF_CONNECTION,
208 C_WF_REPORT_PARAMS,
209 C_CONNECTED,
210 C_STARTING_SYNC_S,
211 C_STARTING_SYNC_T,
212 C_WF_BITMAP_S,
213 C_WF_BITMAP_T,
214 C_WF_SYNC_UUID,
215
216
217
218 C_SYNC_SOURCE,
219 C_SYNC_TARGET,
220 C_VERIFY_S,
221 C_VERIFY_T,
222 C_PAUSED_SYNC_S,
223 C_PAUSED_SYNC_T,
224
225 C_AHEAD,
226 C_BEHIND,
227
228 C_MASK = 31
229 };
230
231 enum drbd_disk_state {
232 D_DISKLESS,
233 D_ATTACHING,
234 D_FAILED,
235
236 D_NEGOTIATING,
237 D_INCONSISTENT,
238 D_OUTDATED,
239 D_UNKNOWN,
240 D_CONSISTENT,
241 D_UP_TO_DATE,
242 D_MASK = 15
243 };
244
245 union drbd_state {
246
247
248
249
250
251
252
253
254 struct {
255 #if defined(__LITTLE_ENDIAN_BITFIELD)
256 unsigned role:2 ;
257 unsigned peer:2 ;
258 unsigned conn:5 ;
259 unsigned disk:4 ;
260 unsigned pdsk:4 ;
261 unsigned susp:1 ;
262 unsigned aftr_isp:1 ;
263 unsigned peer_isp:1 ;
264 unsigned user_isp:1 ;
265 unsigned susp_nod:1 ;
266 unsigned susp_fen:1 ;
267 unsigned _pad:9;
268 #elif defined(__BIG_ENDIAN_BITFIELD)
269 unsigned _pad:9;
270 unsigned susp_fen:1 ;
271 unsigned susp_nod:1 ;
272 unsigned user_isp:1 ;
273 unsigned peer_isp:1 ;
274 unsigned aftr_isp:1 ;
275 unsigned susp:1 ;
276 unsigned pdsk:4 ;
277 unsigned disk:4 ;
278 unsigned conn:5 ;
279 unsigned peer:2 ;
280 unsigned role:2 ;
281 #else
282 # error "this endianness is not supported"
283 #endif
284 };
285 unsigned int i;
286 };
287
288 enum drbd_state_rv {
289 SS_CW_NO_NEED = 4,
290 SS_CW_SUCCESS = 3,
291 SS_NOTHING_TO_DO = 2,
292 SS_SUCCESS = 1,
293 SS_UNKNOWN_ERROR = 0,
294 SS_TWO_PRIMARIES = -1,
295 SS_NO_UP_TO_DATE_DISK = -2,
296 SS_NO_LOCAL_DISK = -4,
297 SS_NO_REMOTE_DISK = -5,
298 SS_CONNECTED_OUTDATES = -6,
299 SS_PRIMARY_NOP = -7,
300 SS_RESYNC_RUNNING = -8,
301 SS_ALREADY_STANDALONE = -9,
302 SS_CW_FAILED_BY_PEER = -10,
303 SS_IS_DISKLESS = -11,
304 SS_DEVICE_IN_USE = -12,
305 SS_NO_NET_CONFIG = -13,
306 SS_NO_VERIFY_ALG = -14,
307 SS_NEED_CONNECTION = -15,
308 SS_LOWER_THAN_OUTDATED = -16,
309 SS_NOT_SUPPORTED = -17,
310 SS_IN_TRANSIENT_STATE = -18,
311 SS_CONCURRENT_ST_CHG = -19,
312 SS_O_VOL_PEER_PRI = -20,
313 SS_OUTDATE_WO_CONN = -21,
314 SS_AFTER_LAST_ERROR = -22,
315 };
316
317 #define SHARED_SECRET_MAX 64
318
319 #define MDF_CONSISTENT (1 << 0)
320 #define MDF_PRIMARY_IND (1 << 1)
321 #define MDF_CONNECTED_IND (1 << 2)
322 #define MDF_FULL_SYNC (1 << 3)
323 #define MDF_WAS_UP_TO_DATE (1 << 4)
324 #define MDF_PEER_OUT_DATED (1 << 5)
325 #define MDF_CRASHED_PRIMARY (1 << 6)
326 #define MDF_AL_CLEAN (1 << 7)
327 #define MDF_AL_DISABLED (1 << 8)
328
329 #define MAX_PEERS 32
330
331 enum drbd_uuid_index {
332 UI_CURRENT,
333 UI_BITMAP,
334 UI_HISTORY_START,
335 UI_HISTORY_END,
336 UI_SIZE,
337 UI_FLAGS,
338 UI_EXTENDED_SIZE
339 };
340
341 #define HISTORY_UUIDS MAX_PEERS
342
343 enum drbd_timeout_flag {
344 UT_DEFAULT = 0,
345 UT_DEGRADED = 1,
346 UT_PEER_OUTDATED = 2,
347 };
348
349 enum drbd_notification_type {
350 NOTIFY_EXISTS,
351 NOTIFY_CREATE,
352 NOTIFY_CHANGE,
353 NOTIFY_DESTROY,
354 NOTIFY_CALL,
355 NOTIFY_RESPONSE,
356
357 NOTIFY_CONTINUES = 0x8000,
358 NOTIFY_FLAGS = NOTIFY_CONTINUES,
359 };
360
361 enum drbd_peer_state {
362 P_INCONSISTENT = 3,
363 P_OUTDATED = 4,
364 P_DOWN = 5,
365 P_PRIMARY = 6,
366 P_FENCING = 7,
367 };
368
369 #define UUID_JUST_CREATED ((__u64)4)
370
371 enum write_ordering_e {
372 WO_NONE,
373 WO_DRAIN_IO,
374 WO_BDEV_FLUSH,
375 WO_BIO_BARRIER
376 };
377
378
379 #define DRBD_MAGIC 0x83740267
380 #define DRBD_MAGIC_BIG 0x835a
381 #define DRBD_MAGIC_100 0x8620ec20
382
383 #define DRBD_MD_MAGIC_07 (DRBD_MAGIC+3)
384 #define DRBD_MD_MAGIC_08 (DRBD_MAGIC+4)
385 #define DRBD_MD_MAGIC_84_UNCLEAN (DRBD_MAGIC+5)
386
387
388
389
390 #define DRBD_AL_MAGIC 0x69cb65a2
391
392
393 #define DRBD_MD_INDEX_INTERNAL -1
394 #define DRBD_MD_INDEX_FLEX_EXT -2
395 #define DRBD_MD_INDEX_FLEX_INT -3
396
397 #define DRBD_CPU_MASK_SIZE 32
398
399 #endif