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1 | 34c9dd8e | aliguori | /*
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2 | 34c9dd8e | aliguori | * QEMU live migration
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3 | 34c9dd8e | aliguori | *
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4 | 34c9dd8e | aliguori | * Copyright IBM, Corp. 2008
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5 | 34c9dd8e | aliguori | *
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6 | 34c9dd8e | aliguori | * Authors:
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7 | 34c9dd8e | aliguori | * Anthony Liguori <aliguori@us.ibm.com>
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8 | 34c9dd8e | aliguori | *
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9 | 34c9dd8e | aliguori | * This work is licensed under the terms of the GNU GPL, version 2. See
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10 | 34c9dd8e | aliguori | * the COPYING file in the top-level directory.
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11 | 34c9dd8e | aliguori | *
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12 | 34c9dd8e | aliguori | */
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13 | 34c9dd8e | aliguori | |
14 | 34c9dd8e | aliguori | #include "qemu-common.h" |
15 | 34c9dd8e | aliguori | #include "qemu_socket.h" |
16 | 34c9dd8e | aliguori | #include "migration.h" |
17 | 34c9dd8e | aliguori | #include "qemu-char.h" |
18 | 34c9dd8e | aliguori | #include "buffered_file.h" |
19 | 34c9dd8e | aliguori | #include "block.h" |
20 | 34c9dd8e | aliguori | |
21 | 34c9dd8e | aliguori | //#define DEBUG_MIGRATION_TCP
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22 | 34c9dd8e | aliguori | |
23 | 34c9dd8e | aliguori | #ifdef DEBUG_MIGRATION_TCP
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24 | d0f2c4c6 | malc | #define DPRINTF(fmt, ...) \
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25 | 34c9dd8e | aliguori | do { printf("migration-tcp: " fmt, ## __VA_ARGS__); } while (0) |
26 | 34c9dd8e | aliguori | #else
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27 | d0f2c4c6 | malc | #define DPRINTF(fmt, ...) \
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28 | 34c9dd8e | aliguori | do { } while (0) |
29 | 34c9dd8e | aliguori | #endif
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30 | 34c9dd8e | aliguori | |
31 | 065e2813 | aliguori | static int socket_errno(FdMigrationState *s) |
32 | 34c9dd8e | aliguori | { |
33 | 8ad9fa5d | aliguori | return socket_error();
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34 | 34c9dd8e | aliguori | } |
35 | 34c9dd8e | aliguori | |
36 | 065e2813 | aliguori | static int socket_write(FdMigrationState *s, const void * buf, size_t size) |
37 | 34c9dd8e | aliguori | { |
38 | 065e2813 | aliguori | return send(s->fd, buf, size, 0); |
39 | 34c9dd8e | aliguori | } |
40 | 34c9dd8e | aliguori | |
41 | 065e2813 | aliguori | static int tcp_close(FdMigrationState *s) |
42 | 34c9dd8e | aliguori | { |
43 | d0f2c4c6 | malc | DPRINTF("tcp_close\n");
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44 | 34c9dd8e | aliguori | if (s->fd != -1) { |
45 | ff8d81d8 | aliguori | close(s->fd); |
46 | ff8d81d8 | aliguori | s->fd = -1;
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47 | 34c9dd8e | aliguori | } |
48 | 34c9dd8e | aliguori | return 0; |
49 | 34c9dd8e | aliguori | } |
50 | 34c9dd8e | aliguori | |
51 | 34c9dd8e | aliguori | |
52 | 34c9dd8e | aliguori | static void tcp_wait_for_connect(void *opaque) |
53 | 34c9dd8e | aliguori | { |
54 | 34c9dd8e | aliguori | FdMigrationState *s = opaque; |
55 | 34c9dd8e | aliguori | int val, ret;
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56 | 4761a48b | blueswir1 | socklen_t valsize = sizeof(val);
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57 | 34c9dd8e | aliguori | |
58 | d0f2c4c6 | malc | DPRINTF("connect completed\n");
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59 | 34c9dd8e | aliguori | do {
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60 | 0a656f5f | malc | ret = getsockopt(s->fd, SOL_SOCKET, SO_ERROR, (void *) &val, &valsize);
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61 | 065e2813 | aliguori | } while (ret == -1 && (s->get_error(s)) == EINTR); |
62 | 34c9dd8e | aliguori | |
63 | 34c9dd8e | aliguori | if (ret < 0) { |
64 | 065e2813 | aliguori | migrate_fd_error(s); |
65 | 34c9dd8e | aliguori | return;
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66 | 34c9dd8e | aliguori | } |
67 | 34c9dd8e | aliguori | |
68 | 34c9dd8e | aliguori | qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL); |
69 | 34c9dd8e | aliguori | |
70 | 34c9dd8e | aliguori | if (val == 0) |
71 | 065e2813 | aliguori | migrate_fd_connect(s); |
72 | 34c9dd8e | aliguori | else {
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73 | d0f2c4c6 | malc | DPRINTF("error connecting %d\n", val);
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74 | 065e2813 | aliguori | migrate_fd_error(s); |
75 | 34c9dd8e | aliguori | } |
76 | 34c9dd8e | aliguori | } |
77 | 34c9dd8e | aliguori | |
78 | f327aa0c | Jan Kiszka | MigrationState *tcp_start_outgoing_migration(Monitor *mon, |
79 | f327aa0c | Jan Kiszka | const char *host_port, |
80 | ff8d81d8 | aliguori | int64_t bandwidth_limit, |
81 | c163b5ca | lirans@il.ibm.com | int detach,
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82 | c163b5ca | lirans@il.ibm.com | int blk,
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83 | c163b5ca | lirans@il.ibm.com | int inc)
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84 | 34c9dd8e | aliguori | { |
85 | 34c9dd8e | aliguori | struct sockaddr_in addr;
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86 | 34c9dd8e | aliguori | FdMigrationState *s; |
87 | 34c9dd8e | aliguori | int ret;
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88 | 34c9dd8e | aliguori | |
89 | 34c9dd8e | aliguori | if (parse_host_port(&addr, host_port) < 0) |
90 | 34c9dd8e | aliguori | return NULL; |
91 | 34c9dd8e | aliguori | |
92 | 34c9dd8e | aliguori | s = qemu_mallocz(sizeof(*s));
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93 | 34c9dd8e | aliguori | |
94 | 065e2813 | aliguori | s->get_error = socket_errno; |
95 | 065e2813 | aliguori | s->write = socket_write; |
96 | 065e2813 | aliguori | s->close = tcp_close; |
97 | 065e2813 | aliguori | s->mig_state.cancel = migrate_fd_cancel; |
98 | 065e2813 | aliguori | s->mig_state.get_status = migrate_fd_get_status; |
99 | 065e2813 | aliguori | s->mig_state.release = migrate_fd_release; |
100 | 34c9dd8e | aliguori | |
101 | c163b5ca | lirans@il.ibm.com | s->mig_state.blk = blk; |
102 | c163b5ca | lirans@il.ibm.com | s->mig_state.shared = inc; |
103 | c163b5ca | lirans@il.ibm.com | |
104 | 34c9dd8e | aliguori | s->state = MIG_STATE_ACTIVE; |
105 | f327aa0c | Jan Kiszka | s->mon = NULL;
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106 | 34c9dd8e | aliguori | s->bandwidth_limit = bandwidth_limit; |
107 | 40ff6d7e | Kevin Wolf | s->fd = qemu_socket(PF_INET, SOCK_STREAM, 0);
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108 | 34c9dd8e | aliguori | if (s->fd == -1) { |
109 | 34c9dd8e | aliguori | qemu_free(s); |
110 | ff8d81d8 | aliguori | return NULL; |
111 | 34c9dd8e | aliguori | } |
112 | 34c9dd8e | aliguori | |
113 | 17e90973 | aliguori | socket_set_nonblock(s->fd); |
114 | 34c9dd8e | aliguori | |
115 | f327aa0c | Jan Kiszka | if (!detach) {
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116 | f327aa0c | Jan Kiszka | migrate_fd_monitor_suspend(s, mon); |
117 | f327aa0c | Jan Kiszka | } |
118 | 34c9dd8e | aliguori | |
119 | 34c9dd8e | aliguori | do {
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120 | 34c9dd8e | aliguori | ret = connect(s->fd, (struct sockaddr *)&addr, sizeof(addr)); |
121 | 34c9dd8e | aliguori | if (ret == -1) |
122 | 065e2813 | aliguori | ret = -(s->get_error(s)); |
123 | 34c9dd8e | aliguori | |
124 | c1d36665 | aliguori | if (ret == -EINPROGRESS || ret == -EWOULDBLOCK)
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125 | 34c9dd8e | aliguori | qemu_set_fd_handler2(s->fd, NULL, NULL, tcp_wait_for_connect, s); |
126 | 34c9dd8e | aliguori | } while (ret == -EINTR);
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127 | 34c9dd8e | aliguori | |
128 | c1d36665 | aliguori | if (ret < 0 && ret != -EINPROGRESS && ret != -EWOULDBLOCK) { |
129 | d0f2c4c6 | malc | DPRINTF("connect failed\n");
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130 | 304e3a7c | Yoshiaki Tamura | migrate_fd_error(s); |
131 | 34c9dd8e | aliguori | } else if (ret >= 0) |
132 | 065e2813 | aliguori | migrate_fd_connect(s); |
133 | 34c9dd8e | aliguori | |
134 | 34c9dd8e | aliguori | return &s->mig_state;
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135 | 34c9dd8e | aliguori | } |
136 | 34c9dd8e | aliguori | |
137 | 34c9dd8e | aliguori | static void tcp_accept_incoming_migration(void *opaque) |
138 | 34c9dd8e | aliguori | { |
139 | 34c9dd8e | aliguori | struct sockaddr_in addr;
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140 | 34c9dd8e | aliguori | socklen_t addrlen = sizeof(addr);
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141 | e0efb993 | Stefan Weil | int s = (intptr_t)opaque;
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142 | 34c9dd8e | aliguori | QEMUFile *f; |
143 | 511c0231 | Juan Quintela | int c;
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144 | 34c9dd8e | aliguori | |
145 | 34c9dd8e | aliguori | do {
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146 | 40ff6d7e | Kevin Wolf | c = qemu_accept(s, (struct sockaddr *)&addr, &addrlen);
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147 | c1d36665 | aliguori | } while (c == -1 && socket_error() == EINTR); |
148 | 34c9dd8e | aliguori | |
149 | d0f2c4c6 | malc | DPRINTF("accepted migration\n");
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150 | 34c9dd8e | aliguori | |
151 | 34c9dd8e | aliguori | if (c == -1) { |
152 | 34c9dd8e | aliguori | fprintf(stderr, "could not accept migration connection\n");
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153 | d092c108 | Shahar Havivi | goto out2;
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154 | 34c9dd8e | aliguori | } |
155 | 34c9dd8e | aliguori | |
156 | c1d36665 | aliguori | f = qemu_fopen_socket(c); |
157 | 34c9dd8e | aliguori | if (f == NULL) { |
158 | 34c9dd8e | aliguori | fprintf(stderr, "could not qemu_fopen socket\n");
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159 | 34c9dd8e | aliguori | goto out;
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160 | 34c9dd8e | aliguori | } |
161 | 34c9dd8e | aliguori | |
162 | 511c0231 | Juan Quintela | process_incoming_migration(f); |
163 | 34c9dd8e | aliguori | qemu_fclose(f); |
164 | 34c9dd8e | aliguori | out:
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165 | d092c108 | Shahar Havivi | close(c); |
166 | d092c108 | Shahar Havivi | out2:
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167 | cfaf6d36 | Juan Quintela | qemu_set_fd_handler2(s, NULL, NULL, NULL, NULL); |
168 | cfaf6d36 | Juan Quintela | close(s); |
169 | 34c9dd8e | aliguori | } |
170 | 34c9dd8e | aliguori | |
171 | 34c9dd8e | aliguori | int tcp_start_incoming_migration(const char *host_port) |
172 | 34c9dd8e | aliguori | { |
173 | 34c9dd8e | aliguori | struct sockaddr_in addr;
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174 | 34c9dd8e | aliguori | int val;
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175 | 34c9dd8e | aliguori | int s;
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176 | 34c9dd8e | aliguori | |
177 | 34c9dd8e | aliguori | if (parse_host_port(&addr, host_port) < 0) { |
178 | 34c9dd8e | aliguori | fprintf(stderr, "invalid host/port combination: %s\n", host_port);
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179 | 34c9dd8e | aliguori | return -EINVAL;
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180 | 34c9dd8e | aliguori | } |
181 | 34c9dd8e | aliguori | |
182 | 40ff6d7e | Kevin Wolf | s = qemu_socket(PF_INET, SOCK_STREAM, 0);
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183 | 34c9dd8e | aliguori | if (s == -1) |
184 | c1d36665 | aliguori | return -socket_error();
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185 | 34c9dd8e | aliguori | |
186 | 34c9dd8e | aliguori | val = 1;
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187 | 34c9dd8e | aliguori | setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (const char *)&val, sizeof(val)); |
188 | 34c9dd8e | aliguori | |
189 | 34c9dd8e | aliguori | if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) == -1) |
190 | 34c9dd8e | aliguori | goto err;
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191 | 34c9dd8e | aliguori | |
192 | 34c9dd8e | aliguori | if (listen(s, 1) == -1) |
193 | 34c9dd8e | aliguori | goto err;
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194 | 34c9dd8e | aliguori | |
195 | 34c9dd8e | aliguori | qemu_set_fd_handler2(s, NULL, tcp_accept_incoming_migration, NULL, |
196 | e0efb993 | Stefan Weil | (void *)(intptr_t)s);
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197 | 34c9dd8e | aliguori | |
198 | 34c9dd8e | aliguori | return 0; |
199 | 34c9dd8e | aliguori | |
200 | 34c9dd8e | aliguori | err:
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201 | 34c9dd8e | aliguori | close(s); |
202 | c1d36665 | aliguori | return -socket_error();
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203 | 34c9dd8e | aliguori | } |