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1 | 065e2813 | aliguori | /*
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2 | 065e2813 | aliguori | * QEMU live migration
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3 | 065e2813 | aliguori | *
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4 | 065e2813 | aliguori | * Copyright IBM, Corp. 2008
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5 | 065e2813 | aliguori | * Copyright Dell MessageOne 2008
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6 | 065e2813 | aliguori | *
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7 | 065e2813 | aliguori | * Authors:
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8 | 065e2813 | aliguori | * Anthony Liguori <aliguori@us.ibm.com>
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9 | 065e2813 | aliguori | * Charles Duffy <charles_duffy@messageone.com>
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10 | 065e2813 | aliguori | *
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11 | 065e2813 | aliguori | * This work is licensed under the terms of the GNU GPL, version 2. See
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12 | 065e2813 | aliguori | * the COPYING file in the top-level directory.
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13 | 065e2813 | aliguori | *
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14 | 065e2813 | aliguori | */
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15 | 065e2813 | aliguori | |
16 | 065e2813 | aliguori | #include "qemu-common.h" |
17 | 065e2813 | aliguori | #include "qemu_socket.h" |
18 | 065e2813 | aliguori | #include "migration.h" |
19 | 065e2813 | aliguori | #include "qemu-char.h" |
20 | 065e2813 | aliguori | #include "sysemu.h" |
21 | 065e2813 | aliguori | #include "buffered_file.h" |
22 | 065e2813 | aliguori | #include "block.h" |
23 | 065e2813 | aliguori | |
24 | 065e2813 | aliguori | //#define DEBUG_MIGRATION_EXEC
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25 | 065e2813 | aliguori | |
26 | 065e2813 | aliguori | #ifdef DEBUG_MIGRATION_EXEC
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27 | d0f2c4c6 | malc | #define DPRINTF(fmt, ...) \
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28 | 065e2813 | aliguori | do { printf("migration-exec: " fmt, ## __VA_ARGS__); } while (0) |
29 | 065e2813 | aliguori | #else
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30 | d0f2c4c6 | malc | #define DPRINTF(fmt, ...) \
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31 | 065e2813 | aliguori | do { } while (0) |
32 | 065e2813 | aliguori | #endif
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33 | 065e2813 | aliguori | |
34 | 065e2813 | aliguori | static int file_errno(FdMigrationState *s) |
35 | 065e2813 | aliguori | { |
36 | 065e2813 | aliguori | return errno;
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37 | 065e2813 | aliguori | } |
38 | 065e2813 | aliguori | |
39 | 065e2813 | aliguori | static int file_write(FdMigrationState *s, const void * buf, size_t size) |
40 | 065e2813 | aliguori | { |
41 | 065e2813 | aliguori | return write(s->fd, buf, size);
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42 | 065e2813 | aliguori | } |
43 | 065e2813 | aliguori | |
44 | 065e2813 | aliguori | static int exec_close(FdMigrationState *s) |
45 | 065e2813 | aliguori | { |
46 | d0f2c4c6 | malc | DPRINTF("exec_close\n");
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47 | 065e2813 | aliguori | if (s->opaque) {
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48 | 065e2813 | aliguori | qemu_fclose(s->opaque); |
49 | 065e2813 | aliguori | s->opaque = NULL;
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50 | 065e2813 | aliguori | s->fd = -1;
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51 | 065e2813 | aliguori | } |
52 | 065e2813 | aliguori | return 0; |
53 | 065e2813 | aliguori | } |
54 | 065e2813 | aliguori | |
55 | f327aa0c | Jan Kiszka | MigrationState *exec_start_outgoing_migration(Monitor *mon, |
56 | f327aa0c | Jan Kiszka | const char *command, |
57 | c163b5ca | lirans@il.ibm.com | int64_t bandwidth_limit, |
58 | c163b5ca | lirans@il.ibm.com | int detach,
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59 | c163b5ca | lirans@il.ibm.com | int blk,
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60 | c163b5ca | lirans@il.ibm.com | int inc)
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61 | 065e2813 | aliguori | { |
62 | 065e2813 | aliguori | FdMigrationState *s; |
63 | 065e2813 | aliguori | FILE *f; |
64 | 065e2813 | aliguori | |
65 | 065e2813 | aliguori | s = qemu_mallocz(sizeof(*s));
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66 | 065e2813 | aliguori | |
67 | 065e2813 | aliguori | f = popen(command, "w");
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68 | 065e2813 | aliguori | if (f == NULL) { |
69 | d0f2c4c6 | malc | DPRINTF("Unable to popen exec target\n");
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70 | 065e2813 | aliguori | goto err_after_alloc;
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71 | 065e2813 | aliguori | } |
72 | 065e2813 | aliguori | |
73 | 065e2813 | aliguori | s->fd = fileno(f); |
74 | 065e2813 | aliguori | if (s->fd == -1) { |
75 | d0f2c4c6 | malc | DPRINTF("Unable to retrieve file descriptor for popen'd handle\n");
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76 | 065e2813 | aliguori | goto err_after_open;
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77 | 065e2813 | aliguori | } |
78 | 065e2813 | aliguori | |
79 | 90750009 | Chris Lalancette | socket_set_nonblock(s->fd); |
80 | 065e2813 | aliguori | |
81 | 065e2813 | aliguori | s->opaque = qemu_popen(f, "w");
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82 | 065e2813 | aliguori | |
83 | 8ad9fa5d | aliguori | s->close = exec_close; |
84 | 065e2813 | aliguori | s->get_error = file_errno; |
85 | 065e2813 | aliguori | s->write = file_write; |
86 | 065e2813 | aliguori | s->mig_state.cancel = migrate_fd_cancel; |
87 | 065e2813 | aliguori | s->mig_state.get_status = migrate_fd_get_status; |
88 | 065e2813 | aliguori | s->mig_state.release = migrate_fd_release; |
89 | 065e2813 | aliguori | |
90 | c163b5ca | lirans@il.ibm.com | s->mig_state.blk = blk; |
91 | c163b5ca | lirans@il.ibm.com | s->mig_state.shared = inc; |
92 | f327aa0c | Jan Kiszka | |
93 | 065e2813 | aliguori | s->state = MIG_STATE_ACTIVE; |
94 | f327aa0c | Jan Kiszka | s->mon = NULL;
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95 | 065e2813 | aliguori | s->bandwidth_limit = bandwidth_limit; |
96 | 065e2813 | aliguori | |
97 | f327aa0c | Jan Kiszka | if (!detach) {
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98 | f327aa0c | Jan Kiszka | migrate_fd_monitor_suspend(s, mon); |
99 | f327aa0c | Jan Kiszka | } |
100 | 065e2813 | aliguori | |
101 | 065e2813 | aliguori | migrate_fd_connect(s); |
102 | 065e2813 | aliguori | return &s->mig_state;
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103 | 065e2813 | aliguori | |
104 | 065e2813 | aliguori | err_after_open:
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105 | 065e2813 | aliguori | pclose(f); |
106 | 065e2813 | aliguori | err_after_alloc:
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107 | 065e2813 | aliguori | qemu_free(s); |
108 | 065e2813 | aliguori | return NULL; |
109 | 065e2813 | aliguori | } |
110 | 065e2813 | aliguori | |
111 | 8a43b1ea | Chris Lalancette | static void exec_accept_incoming_migration(void *opaque) |
112 | 065e2813 | aliguori | { |
113 | 8a43b1ea | Chris Lalancette | QEMUFile *f = opaque; |
114 | 065e2813 | aliguori | int ret;
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115 | 065e2813 | aliguori | |
116 | 065e2813 | aliguori | ret = qemu_loadvm_state(f); |
117 | 065e2813 | aliguori | if (ret < 0) { |
118 | 065e2813 | aliguori | fprintf(stderr, "load of migration failed\n");
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119 | 065e2813 | aliguori | goto err;
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120 | 065e2813 | aliguori | } |
121 | 065e2813 | aliguori | qemu_announce_self(); |
122 | d0f2c4c6 | malc | DPRINTF("successfully loaded vm state\n");
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123 | 8a43b1ea | Chris Lalancette | /* we've successfully migrated, close the fd */
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124 | 7f79dd28 | Paolo Bonzini | qemu_set_fd_handler2(qemu_stdio_fd(f), NULL, NULL, NULL, NULL); |
125 | d399f677 | Paolo Bonzini | if (autostart)
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126 | d399f677 | Paolo Bonzini | vm_start(); |
127 | 065e2813 | aliguori | |
128 | 065e2813 | aliguori | err:
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129 | 065e2813 | aliguori | qemu_fclose(f); |
130 | 8a43b1ea | Chris Lalancette | } |
131 | 8a43b1ea | Chris Lalancette | |
132 | 8a43b1ea | Chris Lalancette | int exec_start_incoming_migration(const char *command) |
133 | 8a43b1ea | Chris Lalancette | { |
134 | 8a43b1ea | Chris Lalancette | QEMUFile *f; |
135 | 8a43b1ea | Chris Lalancette | |
136 | d0f2c4c6 | malc | DPRINTF("Attempting to start an incoming migration\n");
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137 | 8a43b1ea | Chris Lalancette | f = qemu_popen_cmd(command, "r");
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138 | 8a43b1ea | Chris Lalancette | if(f == NULL) { |
139 | d0f2c4c6 | malc | DPRINTF("Unable to apply qemu wrapper to popen file\n");
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140 | 8a43b1ea | Chris Lalancette | return -errno;
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141 | 8a43b1ea | Chris Lalancette | } |
142 | 8a43b1ea | Chris Lalancette | |
143 | 7f79dd28 | Paolo Bonzini | qemu_set_fd_handler2(qemu_stdio_fd(f), NULL,
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144 | 8a43b1ea | Chris Lalancette | exec_accept_incoming_migration, NULL,
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145 | 8a43b1ea | Chris Lalancette | (void *)(unsigned long)f); |
146 | 8a43b1ea | Chris Lalancette | |
147 | 8a43b1ea | Chris Lalancette | return 0; |
148 | 065e2813 | aliguori | } |