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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
25#define QEMU_VM_FILE_MAGIC 0x5145564d
26#define QEMU_VM_FILE_VERSION_COMPAT 0x00000002
27#define QEMU_VM_FILE_VERSION 0x00000003
28
29#define QEMU_VM_EOF 0x00
30#define QEMU_VM_SECTION_START 0x01
31#define QEMU_VM_SECTION_PART 0x02
32#define QEMU_VM_SECTION_END 0x03
33#define QEMU_VM_SECTION_FULL 0x04
34#define QEMU_VM_SUBSECTION 0x05
35#define QEMU_VM_VMDESCRIPTION 0x06
36#define QEMU_VM_CONFIGURATION 0x07
37#define QEMU_VM_COMMAND 0x08
38#define QEMU_VM_SECTION_FOOTER 0x7e
39
40struct MigrationParams {
41 bool blk;
42 bool shared;
43};
44
45
46enum mig_rp_message_type {
47 MIG_RP_MSG_INVALID = 0,
48 MIG_RP_MSG_SHUT,
49 MIG_RP_MSG_PONG,
50
51 MIG_RP_MSG_REQ_PAGES_ID,
52 MIG_RP_MSG_REQ_PAGES,
53
54 MIG_RP_MSG_MAX
55};
56
57typedef QLIST_HEAD(, LoadStateEntry) LoadStateEntry_Head;
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71
72typedef enum {
73 POSTCOPY_INCOMING_NONE = 0,
74 POSTCOPY_INCOMING_ADVISE,
75 POSTCOPY_INCOMING_DISCARD,
76 POSTCOPY_INCOMING_LISTENING,
77 POSTCOPY_INCOMING_RUNNING,
78 POSTCOPY_INCOMING_END
79} PostcopyState;
80
81
82struct MigrationIncomingState {
83 QEMUFile *from_src_file;
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88
89 QemuEvent main_thread_load_event;
90
91 bool have_fault_thread;
92 QemuThread fault_thread;
93 QemuSemaphore fault_thread_sem;
94
95 bool have_listen_thread;
96 QemuThread listen_thread;
97 QemuSemaphore listen_thread_sem;
98
99
100 int userfault_fd;
101
102 int userfault_quit_fd;
103 QEMUFile *to_src_file;
104 QemuMutex rp_mutex;
105 void *postcopy_tmp_page;
106
107 QEMUBH *bh;
108
109 int state;
110
111 LoadStateEntry_Head loadvm_handlers;
112};
113
114MigrationIncomingState *migration_incoming_get_current(void);
115MigrationIncomingState *migration_incoming_state_new(QEMUFile *f);
116void migration_incoming_state_destroy(void);
117
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120
121
122struct MigrationSrcPageRequest {
123 RAMBlock *rb;
124 hwaddr offset;
125 hwaddr len;
126
127 QSIMPLEQ_ENTRY(MigrationSrcPageRequest) next_req;
128};
129
130struct MigrationState
131{
132 int64_t bandwidth_limit;
133 size_t bytes_xfer;
134 size_t xfer_limit;
135 QemuThread thread;
136 QEMUBH *cleanup_bh;
137 QEMUFile *to_dst_file;
138 int parameters[MIGRATION_PARAMETER__MAX];
139
140 int state;
141 MigrationParams params;
142
143
144 struct {
145 QEMUFile *from_dst_file;
146 QemuThread rp_thread;
147 bool error;
148 } rp_state;
149
150 double mbps;
151 int64_t total_time;
152 int64_t downtime;
153 int64_t expected_downtime;
154 int64_t dirty_pages_rate;
155 int64_t dirty_bytes_rate;
156 bool enabled_capabilities[MIGRATION_CAPABILITY__MAX];
157 int64_t xbzrle_cache_size;
158 int64_t setup_time;
159 int64_t dirty_sync_count;
160
161
162 bool start_postcopy;
163
164 bool postcopy_after_devices;
165
166
167 bool migration_thread_running;
168
169
170 QemuMutex src_page_req_mutex;
171 QSIMPLEQ_HEAD(src_page_requests, MigrationSrcPageRequest) src_page_requests;
172
173 RAMBlock *last_req_rb;
174};
175
176void migrate_set_state(int *state, int old_state, int new_state);
177
178void process_incoming_migration(QEMUFile *f);
179
180void qemu_start_incoming_migration(const char *uri, Error **errp);
181
182uint64_t migrate_max_downtime(void);
183
184void exec_start_incoming_migration(const char *host_port, Error **errp);
185
186void exec_start_outgoing_migration(MigrationState *s, const char *host_port, Error **errp);
187
188void tcp_start_incoming_migration(const char *host_port, Error **errp);
189
190void tcp_start_outgoing_migration(MigrationState *s, const char *host_port, Error **errp);
191
192void unix_start_incoming_migration(const char *path, Error **errp);
193
194void unix_start_outgoing_migration(MigrationState *s, const char *path, Error **errp);
195
196void fd_start_incoming_migration(const char *path, Error **errp);
197
198void fd_start_outgoing_migration(MigrationState *s, const char *fdname, Error **errp);
199
200void rdma_start_outgoing_migration(void *opaque, const char *host_port, Error **errp);
201
202void rdma_start_incoming_migration(const char *host_port, Error **errp);
203
204void migrate_fd_error(MigrationState *s);
205
206void migrate_fd_connect(MigrationState *s);
207
208int migrate_fd_close(MigrationState *s);
209
210void add_migration_state_change_notifier(Notifier *notify);
211void remove_migration_state_change_notifier(Notifier *notify);
212MigrationState *migrate_init(const MigrationParams *params);
213bool migration_in_setup(MigrationState *);
214bool migration_has_finished(MigrationState *);
215bool migration_has_failed(MigrationState *);
216
217bool migration_in_postcopy(MigrationState *);
218
219bool migration_in_postcopy_after_devices(MigrationState *);
220MigrationState *migrate_get_current(void);
221
222void migrate_compress_threads_create(void);
223void migrate_compress_threads_join(void);
224void migrate_decompress_threads_create(void);
225void migrate_decompress_threads_join(void);
226uint64_t ram_bytes_remaining(void);
227uint64_t ram_bytes_transferred(void);
228uint64_t ram_bytes_total(void);
229void free_xbzrle_decoded_buf(void);
230
231void acct_update_position(QEMUFile *f, size_t size, bool zero);
232
233uint64_t dup_mig_bytes_transferred(void);
234uint64_t dup_mig_pages_transferred(void);
235uint64_t skipped_mig_bytes_transferred(void);
236uint64_t skipped_mig_pages_transferred(void);
237uint64_t norm_mig_bytes_transferred(void);
238uint64_t norm_mig_pages_transferred(void);
239uint64_t xbzrle_mig_bytes_transferred(void);
240uint64_t xbzrle_mig_pages_transferred(void);
241uint64_t xbzrle_mig_pages_overflow(void);
242uint64_t xbzrle_mig_pages_cache_miss(void);
243double xbzrle_mig_cache_miss_rate(void);
244
245void ram_handle_compressed(void *host, uint8_t ch, uint64_t size);
246void ram_debug_dump_bitmap(unsigned long *todump, bool expected);
247
248int ram_postcopy_send_discard_bitmap(MigrationState *ms);
249
250int ram_discard_range(MigrationIncomingState *mis, const char *block_name,
251 uint64_t start, size_t length);
252int ram_postcopy_incoming_init(MigrationIncomingState *mis);
253
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258
259void migrate_add_blocker(Error *reason);
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265
266void migrate_del_blocker(Error *reason);
267
268bool migrate_postcopy_ram(void);
269bool migrate_zero_blocks(void);
270
271bool migrate_auto_converge(void);
272
273int xbzrle_encode_buffer(uint8_t *old_buf, uint8_t *new_buf, int slen,
274 uint8_t *dst, int dlen);
275int xbzrle_decode_buffer(uint8_t *src, int slen, uint8_t *dst, int dlen);
276
277int migrate_use_xbzrle(void);
278int64_t migrate_xbzrle_cache_size(void);
279
280int64_t xbzrle_cache_resize(int64_t new_size);
281
282bool migrate_use_compression(void);
283int migrate_compress_level(void);
284int migrate_compress_threads(void);
285int migrate_decompress_threads(void);
286bool migrate_use_events(void);
287
288
289void migrate_send_rp_message(MigrationIncomingState *mis,
290 enum mig_rp_message_type message_type,
291 uint16_t len, void *data);
292void migrate_send_rp_shut(MigrationIncomingState *mis,
293 uint32_t value);
294void migrate_send_rp_pong(MigrationIncomingState *mis,
295 uint32_t value);
296void migrate_send_rp_req_pages(MigrationIncomingState *mis, const char* rbname,
297 ram_addr_t start, size_t len);
298
299void ram_control_before_iterate(QEMUFile *f, uint64_t flags);
300void ram_control_after_iterate(QEMUFile *f, uint64_t flags);
301void ram_control_load_hook(QEMUFile *f, uint64_t flags, void *data);
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307
308#define RAM_SAVE_FLAG_HOOK 0x80
309
310#define RAM_SAVE_CONTROL_NOT_SUPP -1000
311#define RAM_SAVE_CONTROL_DELAYED -2000
312
313size_t ram_control_save_page(QEMUFile *f, ram_addr_t block_offset,
314 ram_addr_t offset, size_t size,
315 uint64_t *bytes_sent);
316
317void ram_mig_init(void);
318void savevm_skip_section_footers(void);
319void register_global_state(void);
320void global_state_set_optional(void);
321void savevm_skip_configuration(void);
322int global_state_store(void);
323void global_state_store_running(void);
324
325void flush_page_queue(MigrationState *ms);
326int ram_save_queue_pages(MigrationState *ms, const char *rbname,
327 ram_addr_t start, ram_addr_t len);
328
329PostcopyState postcopy_state_get(void);
330
331PostcopyState postcopy_state_set(PostcopyState new_state);
332#endif
333