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1 | /* | |
2 | * QEMU live migration | |
3 | * | |
4 | * Copyright IBM, Corp. 2008 | |
5 | * | |
6 | * Authors: | |
7 | * Anthony Liguori <aliguori@us.ibm.com> | |
8 | * | |
9 | * This work is licensed under the terms of the GNU GPL, version 2. See | |
10 | * the COPYING file in the top-level directory. | |
11 | * | |
12 | */ | |
13 | ||
14 | #ifndef QEMU_MIGRATION_H | |
15 | #define QEMU_MIGRATION_H | |
16 | ||
17 | #include "qdict.h" | |
18 | #include "qemu-common.h" | |
19 | #include "notify.h" | |
20 | #include "error.h" | |
21 | #include "vmstate.h" | |
22 | #include "qapi-types.h" | |
23 | ||
24 | struct MigrationParams { | |
25 | bool blk; | |
26 | bool shared; | |
27 | }; | |
28 | ||
29 | typedef struct MigrationState MigrationState; | |
30 | ||
31 | struct MigrationState | |
32 | { | |
33 | int64_t bandwidth_limit; | |
34 | QEMUFile *file; | |
35 | int fd; | |
36 | int state; | |
37 | int (*get_error)(MigrationState *s); | |
38 | int (*close)(MigrationState *s); | |
39 | int (*write)(MigrationState *s, const void *buff, size_t size); | |
40 | void *opaque; | |
41 | MigrationParams params; | |
42 | int64_t total_time; | |
43 | int64_t downtime; | |
44 | int64_t expected_downtime; | |
45 | int64_t dirty_pages_rate; | |
46 | bool enabled_capabilities[MIGRATION_CAPABILITY_MAX]; | |
47 | int64_t xbzrle_cache_size; | |
48 | }; | |
49 | ||
50 | void process_incoming_migration(QEMUFile *f); | |
51 | ||
52 | void qemu_start_incoming_migration(const char *uri, Error **errp); | |
53 | ||
54 | uint64_t migrate_max_downtime(void); | |
55 | ||
56 | void do_info_migrate_print(Monitor *mon, const QObject *data); | |
57 | ||
58 | void do_info_migrate(Monitor *mon, QObject **ret_data); | |
59 | ||
60 | void exec_start_incoming_migration(const char *host_port, Error **errp); | |
61 | ||
62 | void exec_start_outgoing_migration(MigrationState *s, const char *host_port, Error **errp); | |
63 | ||
64 | void tcp_start_incoming_migration(const char *host_port, Error **errp); | |
65 | ||
66 | void tcp_start_outgoing_migration(MigrationState *s, const char *host_port, Error **errp); | |
67 | ||
68 | void unix_start_incoming_migration(const char *path, Error **errp); | |
69 | ||
70 | void unix_start_outgoing_migration(MigrationState *s, const char *path, Error **errp); | |
71 | ||
72 | void fd_start_incoming_migration(const char *path, Error **errp); | |
73 | ||
74 | void fd_start_outgoing_migration(MigrationState *s, const char *fdname, Error **errp); | |
75 | ||
76 | void migrate_fd_error(MigrationState *s); | |
77 | ||
78 | void migrate_fd_connect(MigrationState *s); | |
79 | ||
80 | ssize_t migrate_fd_put_buffer(MigrationState *s, const void *data, | |
81 | size_t size); | |
82 | void migrate_fd_put_ready(MigrationState *s); | |
83 | int migrate_fd_wait_for_unfreeze(MigrationState *s); | |
84 | int migrate_fd_close(MigrationState *s); | |
85 | ||
86 | void add_migration_state_change_notifier(Notifier *notify); | |
87 | void remove_migration_state_change_notifier(Notifier *notify); | |
88 | bool migration_is_active(MigrationState *); | |
89 | bool migration_has_finished(MigrationState *); | |
90 | bool migration_has_failed(MigrationState *); | |
91 | MigrationState *migrate_get_current(void); | |
92 | ||
93 | uint64_t ram_bytes_remaining(void); | |
94 | uint64_t ram_bytes_transferred(void); | |
95 | uint64_t ram_bytes_total(void); | |
96 | ||
97 | extern SaveVMHandlers savevm_ram_handlers; | |
98 | ||
99 | uint64_t dup_mig_bytes_transferred(void); | |
100 | uint64_t dup_mig_pages_transferred(void); | |
101 | uint64_t norm_mig_bytes_transferred(void); | |
102 | uint64_t norm_mig_pages_transferred(void); | |
103 | uint64_t xbzrle_mig_bytes_transferred(void); | |
104 | uint64_t xbzrle_mig_pages_transferred(void); | |
105 | uint64_t xbzrle_mig_pages_overflow(void); | |
106 | uint64_t xbzrle_mig_pages_cache_miss(void); | |
107 | ||
108 | /** | |
109 | * @migrate_add_blocker - prevent migration from proceeding | |
110 | * | |
111 | * @reason - an error to be returned whenever migration is attempted | |
112 | */ | |
113 | void migrate_add_blocker(Error *reason); | |
114 | ||
115 | /** | |
116 | * @migrate_del_blocker - remove a blocking error from migration | |
117 | * | |
118 | * @reason - the error blocking migration | |
119 | */ | |
120 | void migrate_del_blocker(Error *reason); | |
121 | ||
122 | int xbzrle_encode_buffer(uint8_t *old_buf, uint8_t *new_buf, int slen, | |
123 | uint8_t *dst, int dlen); | |
124 | int xbzrle_decode_buffer(uint8_t *src, int slen, uint8_t *dst, int dlen); | |
125 | ||
126 | int migrate_use_xbzrle(void); | |
127 | int64_t migrate_xbzrle_cache_size(void); | |
128 | ||
129 | int64_t xbzrle_cache_resize(int64_t new_size); | |
130 | ||
131 | #endif |