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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 | 6b620ca3 | Paolo Bonzini | * Contributions after 2012-01-13 are licensed under the terms of the
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13 | 6b620ca3 | Paolo Bonzini | * GNU GPL, version 2 or (at your option) any later version.
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14 | 34c9dd8e | aliguori | */
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15 | 34c9dd8e | aliguori | |
16 | 34c9dd8e | aliguori | #include "qemu-common.h" |
17 | 1de7afc9 | Paolo Bonzini | #include "qemu/sockets.h" |
18 | caf71f86 | Paolo Bonzini | #include "migration/migration.h" |
19 | 557ec5a0 | Juan Quintela | #include "migration/qemu-file.h" |
20 | 737e150e | Paolo Bonzini | #include "block/block.h" |
21 | 34c9dd8e | aliguori | |
22 | 34c9dd8e | aliguori | //#define DEBUG_MIGRATION_TCP
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23 | 34c9dd8e | aliguori | |
24 | 34c9dd8e | aliguori | #ifdef DEBUG_MIGRATION_TCP
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25 | d0f2c4c6 | malc | #define DPRINTF(fmt, ...) \
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26 | 34c9dd8e | aliguori | do { printf("migration-tcp: " fmt, ## __VA_ARGS__); } while (0) |
27 | 34c9dd8e | aliguori | #else
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28 | d0f2c4c6 | malc | #define DPRINTF(fmt, ...) \
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29 | 34c9dd8e | aliguori | do { } while (0) |
30 | 34c9dd8e | aliguori | #endif
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31 | 34c9dd8e | aliguori | |
32 | 233aa5c2 | Orit Wasserman | static void tcp_wait_for_connect(int fd, void *opaque) |
33 | 34c9dd8e | aliguori | { |
34 | 22f00a44 | Juan Quintela | MigrationState *s = opaque; |
35 | 34c9dd8e | aliguori | |
36 | 233aa5c2 | Orit Wasserman | if (fd < 0) { |
37 | 233aa5c2 | Orit Wasserman | DPRINTF("migrate connect error\n");
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38 | b352365f | Paolo Bonzini | s->file = NULL;
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39 | 065e2813 | aliguori | migrate_fd_error(s); |
40 | 233aa5c2 | Orit Wasserman | } else {
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41 | 233aa5c2 | Orit Wasserman | DPRINTF("migrate connect success\n");
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42 | b352365f | Paolo Bonzini | s->file = qemu_fopen_socket(fd, "wb");
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43 | 065e2813 | aliguori | migrate_fd_connect(s); |
44 | 34c9dd8e | aliguori | } |
45 | 34c9dd8e | aliguori | } |
46 | 34c9dd8e | aliguori | |
47 | f37afb5a | Paolo Bonzini | void tcp_start_outgoing_migration(MigrationState *s, const char *host_port, Error **errp) |
48 | 34c9dd8e | aliguori | { |
49 | f8bbc128 | Paolo Bonzini | inet_nonblocking_connect(host_port, tcp_wait_for_connect, s, errp); |
50 | 34c9dd8e | aliguori | } |
51 | 34c9dd8e | aliguori | |
52 | 34c9dd8e | aliguori | static void tcp_accept_incoming_migration(void *opaque) |
53 | 34c9dd8e | aliguori | { |
54 | 34c9dd8e | aliguori | struct sockaddr_in addr;
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55 | 34c9dd8e | aliguori | socklen_t addrlen = sizeof(addr);
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56 | e0efb993 | Stefan Weil | int s = (intptr_t)opaque;
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57 | 34c9dd8e | aliguori | QEMUFile *f; |
58 | 511c0231 | Juan Quintela | int c;
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59 | 34c9dd8e | aliguori | |
60 | 34c9dd8e | aliguori | do {
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61 | 40ff6d7e | Kevin Wolf | c = qemu_accept(s, (struct sockaddr *)&addr, &addrlen);
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62 | c1d36665 | aliguori | } while (c == -1 && socket_error() == EINTR); |
63 | a6ef2909 | Paolo Bonzini | qemu_set_fd_handler2(s, NULL, NULL, NULL, NULL); |
64 | 09bac73c | Paolo Bonzini | closesocket(s); |
65 | 34c9dd8e | aliguori | |
66 | d0f2c4c6 | malc | DPRINTF("accepted migration\n");
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67 | 34c9dd8e | aliguori | |
68 | 34c9dd8e | aliguori | if (c == -1) { |
69 | 34c9dd8e | aliguori | fprintf(stderr, "could not accept migration connection\n");
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70 | a6ef2909 | Paolo Bonzini | goto out;
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71 | 34c9dd8e | aliguori | } |
72 | 34c9dd8e | aliguori | |
73 | 0cc3f3cc | Paolo Bonzini | f = qemu_fopen_socket(c, "rb");
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74 | 34c9dd8e | aliguori | if (f == NULL) { |
75 | 34c9dd8e | aliguori | fprintf(stderr, "could not qemu_fopen socket\n");
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76 | 34c9dd8e | aliguori | goto out;
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77 | 34c9dd8e | aliguori | } |
78 | 34c9dd8e | aliguori | |
79 | 511c0231 | Juan Quintela | process_incoming_migration(f); |
80 | ab52a824 | Paolo Bonzini | return;
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81 | ab52a824 | Paolo Bonzini | |
82 | 34c9dd8e | aliguori | out:
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83 | 09bac73c | Paolo Bonzini | closesocket(c); |
84 | 34c9dd8e | aliguori | } |
85 | 34c9dd8e | aliguori | |
86 | 43eaae28 | Paolo Bonzini | void tcp_start_incoming_migration(const char *host_port, Error **errp) |
87 | 34c9dd8e | aliguori | { |
88 | 34c9dd8e | aliguori | int s;
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89 | 34c9dd8e | aliguori | |
90 | d5c5dacc | Amos Kong | s = inet_listen(host_port, NULL, 256, SOCK_STREAM, 0, errp); |
91 | d5c5dacc | Amos Kong | if (s < 0) { |
92 | 43eaae28 | Paolo Bonzini | return;
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93 | ee86c61f | Juan Quintela | } |
94 | 34c9dd8e | aliguori | |
95 | 34c9dd8e | aliguori | qemu_set_fd_handler2(s, NULL, tcp_accept_incoming_migration, NULL, |
96 | e0efb993 | Stefan Weil | (void *)(intptr_t)s);
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97 | 34c9dd8e | aliguori | } |