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065e2813 AL |
1 | /* |
2 | * QEMU live migration | |
3 | * | |
4 | * Copyright IBM, Corp. 2008 | |
5 | * Copyright Dell MessageOne 2008 | |
6 | * | |
7 | * Authors: | |
8 | * Anthony Liguori <aliguori@us.ibm.com> | |
9 | * Charles Duffy <charles_duffy@messageone.com> | |
10 | * | |
11 | * This work is licensed under the terms of the GNU GPL, version 2. See | |
12 | * the COPYING file in the top-level directory. | |
13 | * | |
6b620ca3 PB |
14 | * Contributions after 2012-01-13 are licensed under the terms of the |
15 | * GNU GPL, version 2 or (at your option) any later version. | |
065e2813 AL |
16 | */ |
17 | ||
18 | #include "qemu-common.h" | |
1de7afc9 | 19 | #include "qemu/sockets.h" |
caf71f86 | 20 | #include "migration/migration.h" |
557ec5a0 | 21 | #include "migration/qemu-file.h" |
737e150e | 22 | #include "block/block.h" |
0ffbba35 BS |
23 | #include <sys/types.h> |
24 | #include <sys/wait.h> | |
065e2813 AL |
25 | |
26 | //#define DEBUG_MIGRATION_EXEC | |
27 | ||
28 | #ifdef DEBUG_MIGRATION_EXEC | |
d0f2c4c6 | 29 | #define DPRINTF(fmt, ...) \ |
065e2813 AL |
30 | do { printf("migration-exec: " fmt, ## __VA_ARGS__); } while (0) |
31 | #else | |
d0f2c4c6 | 32 | #define DPRINTF(fmt, ...) \ |
065e2813 AL |
33 | do { } while (0) |
34 | #endif | |
35 | ||
22f00a44 | 36 | static int file_errno(MigrationState *s) |
065e2813 AL |
37 | { |
38 | return errno; | |
39 | } | |
40 | ||
22f00a44 | 41 | static int file_write(MigrationState *s, const void * buf, size_t size) |
065e2813 AL |
42 | { |
43 | return write(s->fd, buf, size); | |
44 | } | |
45 | ||
22f00a44 | 46 | static int exec_close(MigrationState *s) |
065e2813 | 47 | { |
41ef56e6 | 48 | int ret = 0; |
d0f2c4c6 | 49 | DPRINTF("exec_close\n"); |
6c360136 PB |
50 | ret = qemu_fclose(s->opaque); |
51 | s->opaque = NULL; | |
52 | s->fd = -1; | |
41ef56e6 | 53 | return ret; |
065e2813 AL |
54 | } |
55 | ||
f37afb5a | 56 | void exec_start_outgoing_migration(MigrationState *s, const char *command, Error **errp) |
065e2813 | 57 | { |
817b9ed5 PB |
58 | QEMUFile *f; |
59 | f = qemu_popen_cmd(command, "w"); | |
065e2813 | 60 | if (f == NULL) { |
f37afb5a PB |
61 | error_setg_errno(errp, errno, "failed to popen the migration target"); |
62 | return; | |
065e2813 AL |
63 | } |
64 | ||
817b9ed5 PB |
65 | s->opaque = f; |
66 | s->fd = qemu_get_fd(f); | |
f37afb5a | 67 | assert(s->fd != -1); |
065e2813 | 68 | |
8ad9fa5d | 69 | s->close = exec_close; |
065e2813 AL |
70 | s->get_error = file_errno; |
71 | s->write = file_write; | |
065e2813 AL |
72 | |
73 | migrate_fd_connect(s); | |
065e2813 AL |
74 | } |
75 | ||
8a43b1ea | 76 | static void exec_accept_incoming_migration(void *opaque) |
065e2813 | 77 | { |
8a43b1ea | 78 | QEMUFile *f = opaque; |
065e2813 | 79 | |
d263a20b | 80 | qemu_set_fd_handler2(qemu_get_fd(f), NULL, NULL, NULL, NULL); |
a6ef2909 | 81 | process_incoming_migration(f); |
8a43b1ea CL |
82 | } |
83 | ||
43eaae28 | 84 | void exec_start_incoming_migration(const char *command, Error **errp) |
8a43b1ea CL |
85 | { |
86 | QEMUFile *f; | |
87 | ||
d0f2c4c6 | 88 | DPRINTF("Attempting to start an incoming migration\n"); |
8a43b1ea CL |
89 | f = qemu_popen_cmd(command, "r"); |
90 | if(f == NULL) { | |
43eaae28 PB |
91 | error_setg_errno(errp, errno, "failed to popen the migration source"); |
92 | return; | |
8a43b1ea CL |
93 | } |
94 | ||
d263a20b | 95 | qemu_set_fd_handler2(qemu_get_fd(f), NULL, |
1c39e2a2 | 96 | exec_accept_incoming_migration, NULL, f); |
065e2813 | 97 | } |