1#ifndef __DRBD_PROTOCOL_H
2#define __DRBD_PROTOCOL_H
3
4enum drbd_packet {
5
6 P_DATA = 0x00,
7 P_DATA_REPLY = 0x01,
8 P_RS_DATA_REPLY = 0x02,
9 P_BARRIER = 0x03,
10 P_BITMAP = 0x04,
11 P_BECOME_SYNC_TARGET = 0x05,
12 P_BECOME_SYNC_SOURCE = 0x06,
13 P_UNPLUG_REMOTE = 0x07,
14 P_DATA_REQUEST = 0x08,
15 P_RS_DATA_REQUEST = 0x09,
16 P_SYNC_PARAM = 0x0a,
17 P_PROTOCOL = 0x0b,
18 P_UUIDS = 0x0c,
19 P_SIZES = 0x0d,
20 P_STATE = 0x0e,
21 P_SYNC_UUID = 0x0f,
22 P_AUTH_CHALLENGE = 0x10,
23 P_AUTH_RESPONSE = 0x11,
24 P_STATE_CHG_REQ = 0x12,
25
26
27 P_PING = 0x13,
28 P_PING_ACK = 0x14,
29 P_RECV_ACK = 0x15,
30 P_WRITE_ACK = 0x16,
31 P_RS_WRITE_ACK = 0x17,
32 P_SUPERSEDED = 0x18,
33 P_NEG_ACK = 0x19,
34 P_NEG_DREPLY = 0x1a,
35 P_NEG_RS_DREPLY = 0x1b,
36 P_BARRIER_ACK = 0x1c,
37 P_STATE_CHG_REPLY = 0x1d,
38
39
40
41 P_OV_REQUEST = 0x1e,
42 P_OV_REPLY = 0x1f,
43 P_OV_RESULT = 0x20,
44 P_CSUM_RS_REQUEST = 0x21,
45 P_RS_IS_IN_SYNC = 0x22,
46 P_SYNC_PARAM89 = 0x23,
47 P_COMPRESSED_BITMAP = 0x24,
48
49
50 P_DELAY_PROBE = 0x27,
51 P_OUT_OF_SYNC = 0x28,
52 P_RS_CANCEL = 0x29,
53 P_CONN_ST_CHG_REQ = 0x2a,
54 P_CONN_ST_CHG_REPLY = 0x2b,
55 P_RETRY_WRITE = 0x2c,
56 P_PROTOCOL_UPDATE = 0x2d,
57
58
59
60
61 P_TRIM = 0x31,
62
63 P_MAY_IGNORE = 0x100,
64 P_MAX_OPT_CMD = 0x101,
65
66
67
68 P_INITIAL_META = 0xfff1,
69 P_INITIAL_DATA = 0xfff2,
70
71 P_CONNECTION_FEATURES = 0xfffe
72};
73
74#ifndef __packed
75#define __packed __attribute__((packed))
76#endif
77
78
79
80
81
82
83
84
85
86
87
88struct p_header80 {
89 u32 magic;
90 u16 command;
91 u16 length;
92} __packed;
93
94
95struct p_header95 {
96 u16 magic;
97 u16 command;
98 u32 length;
99} __packed;
100
101struct p_header100 {
102 u32 magic;
103 u16 volume;
104 u16 command;
105 u32 length;
106 u32 pad;
107} __packed;
108
109
110#define DP_HARDBARRIER 1
111#define DP_RW_SYNC 2
112#define DP_MAY_SET_IN_SYNC 4
113#define DP_UNPLUG 8
114#define DP_FUA 16
115#define DP_FLUSH 32
116#define DP_DISCARD 64
117#define DP_SEND_RECEIVE_ACK 128
118#define DP_SEND_WRITE_ACK 256
119
120struct p_data {
121 u64 sector;
122 u64 block_id;
123 u32 seq_num;
124 u32 dp_flags;
125} __packed;
126
127struct p_trim {
128 struct p_data p_data;
129 u32 size;
130} __packed;
131
132
133
134
135
136
137
138
139
140struct p_block_ack {
141 u64 sector;
142 u64 block_id;
143 u32 blksize;
144 u32 seq_num;
145} __packed;
146
147struct p_block_req {
148 u64 sector;
149 u64 block_id;
150 u32 blksize;
151 u32 pad;
152} __packed;
153
154
155
156
157
158
159
160
161
162
163#define FF_TRIM 1
164
165struct p_connection_features {
166 u32 protocol_min;
167 u32 feature_flags;
168 u32 protocol_max;
169
170
171
172
173
174 u32 _pad;
175 u64 reserved[7];
176} __packed;
177
178struct p_barrier {
179 u32 barrier;
180 u32 pad;
181} __packed;
182
183struct p_barrier_ack {
184 u32 barrier;
185 u32 set_size;
186} __packed;
187
188struct p_rs_param {
189 u32 resync_rate;
190
191
192 char verify_alg[0];
193} __packed;
194
195struct p_rs_param_89 {
196 u32 resync_rate;
197
198 char verify_alg[SHARED_SECRET_MAX];
199 char csums_alg[SHARED_SECRET_MAX];
200} __packed;
201
202struct p_rs_param_95 {
203 u32 resync_rate;
204 char verify_alg[SHARED_SECRET_MAX];
205 char csums_alg[SHARED_SECRET_MAX];
206 u32 c_plan_ahead;
207 u32 c_delay_target;
208 u32 c_fill_target;
209 u32 c_max_rate;
210} __packed;
211
212enum drbd_conn_flags {
213 CF_DISCARD_MY_DATA = 1,
214 CF_DRY_RUN = 2,
215};
216
217struct p_protocol {
218 u32 protocol;
219 u32 after_sb_0p;
220 u32 after_sb_1p;
221 u32 after_sb_2p;
222 u32 conn_flags;
223 u32 two_primaries;
224
225
226 char integrity_alg[0];
227
228} __packed;
229
230struct p_uuids {
231 u64 uuid[UI_EXTENDED_SIZE];
232} __packed;
233
234struct p_rs_uuid {
235 u64 uuid;
236} __packed;
237
238struct p_sizes {
239 u64 d_size;
240 u64 u_size;
241 u64 c_size;
242 u32 max_bio_size;
243 u16 queue_order_type;
244 u16 dds_flags;
245} __packed;
246
247struct p_state {
248 u32 state;
249} __packed;
250
251struct p_req_state {
252 u32 mask;
253 u32 val;
254} __packed;
255
256struct p_req_state_reply {
257 u32 retcode;
258} __packed;
259
260struct p_drbd06_param {
261 u64 size;
262 u32 state;
263 u32 blksize;
264 u32 protocol;
265 u32 version;
266 u32 gen_cnt[5];
267 u32 bit_map_gen[5];
268} __packed;
269
270struct p_block_desc {
271 u64 sector;
272 u32 blksize;
273 u32 pad;
274} __packed;
275
276
277
278enum drbd_bitmap_code {
279
280
281
282 RLE_VLI_Bits = 2,
283};
284
285struct p_compressed_bm {
286
287
288
289
290
291 u8 encoding;
292
293 u8 code[0];
294} __packed;
295
296struct p_delay_probe93 {
297 u32 seq_num;
298 u32 offset;
299} __packed;
300
301
302
303
304
305#define DRBD_SOCKET_BUFFER_SIZE 4096
306
307#endif
308