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14#ifndef QEMU_MIGRATION_H
15#define QEMU_MIGRATION_H
16
17#include "qapi/qmp/qdict.h"
18#include "qemu-common.h"
19#include "qemu/thread.h"
20#include "qemu/notify.h"
21#include "migration/vmstate.h"
22#include "qapi-types.h"
23#include "exec/cpu-common.h"
24#include "qemu/coroutine_int.h"
25
26#define QEMU_VM_FILE_MAGIC 0x5145564d
27#define QEMU_VM_FILE_VERSION_COMPAT 0x00000002
28#define QEMU_VM_FILE_VERSION 0x00000003
29
30#define QEMU_VM_EOF 0x00
31#define QEMU_VM_SECTION_START 0x01
32#define QEMU_VM_SECTION_PART 0x02
33#define QEMU_VM_SECTION_END 0x03
34#define QEMU_VM_SECTION_FULL 0x04
35#define QEMU_VM_SUBSECTION 0x05
36#define QEMU_VM_VMDESCRIPTION 0x06
37#define QEMU_VM_CONFIGURATION 0x07
38#define QEMU_VM_COMMAND 0x08
39#define QEMU_VM_SECTION_FOOTER 0x7e
40
41struct MigrationParams {
42 bool blk;
43 bool shared;
44};
45
46
47enum mig_rp_message_type {
48 MIG_RP_MSG_INVALID = 0,
49 MIG_RP_MSG_SHUT,
50 MIG_RP_MSG_PONG,
51
52 MIG_RP_MSG_REQ_PAGES_ID,
53 MIG_RP_MSG_REQ_PAGES,
54
55 MIG_RP_MSG_MAX
56};
57
58typedef QLIST_HEAD(, LoadStateEntry) LoadStateEntry_Head;
59
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71
72
73typedef enum {
74 POSTCOPY_INCOMING_NONE = 0,
75 POSTCOPY_INCOMING_ADVISE,
76 POSTCOPY_INCOMING_DISCARD,
77 POSTCOPY_INCOMING_LISTENING,
78 POSTCOPY_INCOMING_RUNNING,
79 POSTCOPY_INCOMING_END
80} PostcopyState;
81
82
83struct MigrationIncomingState {
84 QEMUFile *from_src_file;
85
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88
89
90 QemuEvent main_thread_load_event;
91
92 bool have_fault_thread;
93 QemuThread fault_thread;
94 QemuSemaphore fault_thread_sem;
95
96 bool have_listen_thread;
97 QemuThread listen_thread;
98 QemuSemaphore listen_thread_sem;
99
100
101 int userfault_fd;
102
103 int userfault_quit_fd;
104 QEMUFile *to_src_file;
105 QemuMutex rp_mutex;
106 void *postcopy_tmp_page;
107
108 QEMUBH *bh;
109
110 int state;
111
112 bool have_colo_incoming_thread;
113 QemuThread colo_incoming_thread;
114
115 Coroutine *migration_incoming_co;
116
117
118 LoadStateEntry_Head loadvm_handlers;
119};
120
121MigrationIncomingState *migration_incoming_get_current(void);
122MigrationIncomingState *migration_incoming_state_new(QEMUFile *f);
123void migration_incoming_state_destroy(void);
124
125
126
127
128
129struct MigrationSrcPageRequest {
130 RAMBlock *rb;
131 hwaddr offset;
132 hwaddr len;
133
134 QSIMPLEQ_ENTRY(MigrationSrcPageRequest) next_req;
135};
136
137struct MigrationState
138{
139 size_t bytes_xfer;
140 size_t xfer_limit;
141 QemuThread thread;
142 QEMUBH *cleanup_bh;
143 QEMUFile *to_dst_file;
144
145
146 MigrationParameters parameters;
147
148 int state;
149
150 MigrationParams params;
151
152
153 struct {
154 QEMUFile *from_dst_file;
155 QemuThread rp_thread;
156 bool error;
157 } rp_state;
158
159 double mbps;
160 int64_t total_time;
161 int64_t downtime;
162 int64_t expected_downtime;
163 int64_t dirty_pages_rate;
164 int64_t dirty_bytes_rate;
165 bool enabled_capabilities[MIGRATION_CAPABILITY__MAX];
166 int64_t xbzrle_cache_size;
167 int64_t setup_time;
168 int64_t dirty_sync_count;
169
170 int64_t postcopy_requests;
171
172
173 bool start_postcopy;
174
175 bool postcopy_after_devices;
176
177
178 bool migration_thread_running;
179
180
181 QemuMutex src_page_req_mutex;
182 QSIMPLEQ_HEAD(src_page_requests, MigrationSrcPageRequest) src_page_requests;
183
184 RAMBlock *last_req_rb;
185
186
187 Error *error;
188};
189
190void migrate_set_state(int *state, int old_state, int new_state);
191
192void migration_fd_process_incoming(QEMUFile *f);
193
194void qemu_start_incoming_migration(const char *uri, Error **errp);
195
196void migration_channel_process_incoming(MigrationState *s,
197 QIOChannel *ioc);
198
199void migration_tls_channel_process_incoming(MigrationState *s,
200 QIOChannel *ioc,
201 Error **errp);
202
203void migration_channel_connect(MigrationState *s,
204 QIOChannel *ioc,
205 const char *hostname);
206
207void migration_tls_channel_connect(MigrationState *s,
208 QIOChannel *ioc,
209 const char *hostname,
210 Error **errp);
211
212uint64_t migrate_max_downtime(void);
213
214void exec_start_incoming_migration(const char *host_port, Error **errp);
215
216void exec_start_outgoing_migration(MigrationState *s, const char *host_port, Error **errp);
217
218void tcp_start_incoming_migration(const char *host_port, Error **errp);
219
220void tcp_start_outgoing_migration(MigrationState *s, const char *host_port, Error **errp);
221
222void unix_start_incoming_migration(const char *path, Error **errp);
223
224void unix_start_outgoing_migration(MigrationState *s, const char *path, Error **errp);
225
226void fd_start_incoming_migration(const char *path, Error **errp);
227
228void fd_start_outgoing_migration(MigrationState *s, const char *fdname, Error **errp);
229
230void rdma_start_outgoing_migration(void *opaque, const char *host_port, Error **errp);
231
232void rdma_start_incoming_migration(const char *host_port, Error **errp);
233
234void migrate_fd_error(MigrationState *s, const Error *error);
235
236void migrate_fd_connect(MigrationState *s);
237
238void add_migration_state_change_notifier(Notifier *notify);
239void remove_migration_state_change_notifier(Notifier *notify);
240MigrationState *migrate_init(const MigrationParams *params);
241bool migration_is_blocked(Error **errp);
242bool migration_in_setup(MigrationState *);
243bool migration_has_finished(MigrationState *);
244bool migration_has_failed(MigrationState *);
245
246bool migration_in_postcopy(MigrationState *);
247
248bool migration_in_postcopy_after_devices(MigrationState *);
249MigrationState *migrate_get_current(void);
250
251void migrate_compress_threads_create(void);
252void migrate_compress_threads_join(void);
253void migrate_decompress_threads_create(void);
254void migrate_decompress_threads_join(void);
255uint64_t ram_bytes_remaining(void);
256uint64_t ram_bytes_transferred(void);
257uint64_t ram_bytes_total(void);
258void free_xbzrle_decoded_buf(void);
259
260void acct_update_position(QEMUFile *f, size_t size, bool zero);
261
262uint64_t dup_mig_bytes_transferred(void);
263uint64_t dup_mig_pages_transferred(void);
264uint64_t skipped_mig_bytes_transferred(void);
265uint64_t skipped_mig_pages_transferred(void);
266uint64_t norm_mig_bytes_transferred(void);
267uint64_t norm_mig_pages_transferred(void);
268uint64_t xbzrle_mig_bytes_transferred(void);
269uint64_t xbzrle_mig_pages_transferred(void);
270uint64_t xbzrle_mig_pages_overflow(void);
271uint64_t xbzrle_mig_pages_cache_miss(void);
272double xbzrle_mig_cache_miss_rate(void);
273
274void ram_handle_compressed(void *host, uint8_t ch, uint64_t size);
275void ram_debug_dump_bitmap(unsigned long *todump, bool expected);
276
277int ram_postcopy_send_discard_bitmap(MigrationState *ms);
278
279int ram_discard_range(MigrationIncomingState *mis, const char *block_name,
280 uint64_t start, size_t length);
281int ram_postcopy_incoming_init(MigrationIncomingState *mis);
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287
288void migrate_add_blocker(Error *reason);
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293
294
295void migrate_del_blocker(Error *reason);
296
297bool migrate_postcopy_ram(void);
298bool migrate_zero_blocks(void);
299
300bool migrate_auto_converge(void);
301
302int xbzrle_encode_buffer(uint8_t *old_buf, uint8_t *new_buf, int slen,
303 uint8_t *dst, int dlen);
304int xbzrle_decode_buffer(uint8_t *src, int slen, uint8_t *dst, int dlen);
305
306int migrate_use_xbzrle(void);
307int64_t migrate_xbzrle_cache_size(void);
308bool migrate_colo_enabled(void);
309
310int64_t xbzrle_cache_resize(int64_t new_size);
311
312bool migrate_use_compression(void);
313int migrate_compress_level(void);
314int migrate_compress_threads(void);
315int migrate_decompress_threads(void);
316bool migrate_use_events(void);
317
318
319void migrate_send_rp_message(MigrationIncomingState *mis,
320 enum mig_rp_message_type message_type,
321 uint16_t len, void *data);
322void migrate_send_rp_shut(MigrationIncomingState *mis,
323 uint32_t value);
324void migrate_send_rp_pong(MigrationIncomingState *mis,
325 uint32_t value);
326void migrate_send_rp_req_pages(MigrationIncomingState *mis, const char* rbname,
327 ram_addr_t start, size_t len);
328
329void ram_control_before_iterate(QEMUFile *f, uint64_t flags);
330void ram_control_after_iterate(QEMUFile *f, uint64_t flags);
331void ram_control_load_hook(QEMUFile *f, uint64_t flags, void *data);
332
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337
338#define RAM_SAVE_FLAG_HOOK 0x80
339
340#define RAM_SAVE_CONTROL_NOT_SUPP -1000
341#define RAM_SAVE_CONTROL_DELAYED -2000
342
343size_t ram_control_save_page(QEMUFile *f, ram_addr_t block_offset,
344 ram_addr_t offset, size_t size,
345 uint64_t *bytes_sent);
346
347void ram_mig_init(void);
348void savevm_skip_section_footers(void);
349void register_global_state(void);
350void global_state_set_optional(void);
351void savevm_skip_configuration(void);
352int global_state_store(void);
353void global_state_store_running(void);
354
355void flush_page_queue(MigrationState *ms);
356int ram_save_queue_pages(MigrationState *ms, const char *rbname,
357 ram_addr_t start, ram_addr_t len);
358
359PostcopyState postcopy_state_get(void);
360
361PostcopyState postcopy_state_set(PostcopyState new_state);
362#endif
363