]>
Commit | Line | Data |
---|---|---|
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 | * | |
14 | */ | |
15 | ||
16 | #include "qemu-common.h" | |
17 | #include "qemu_socket.h" | |
18 | #include "migration.h" | |
19 | #include "qemu-char.h" | |
065e2813 AL |
20 | #include "buffered_file.h" |
21 | #include "block.h" | |
0ffbba35 BS |
22 | #include <sys/types.h> |
23 | #include <sys/wait.h> | |
065e2813 AL |
24 | |
25 | //#define DEBUG_MIGRATION_EXEC | |
26 | ||
27 | #ifdef DEBUG_MIGRATION_EXEC | |
d0f2c4c6 | 28 | #define DPRINTF(fmt, ...) \ |
065e2813 AL |
29 | do { printf("migration-exec: " fmt, ## __VA_ARGS__); } while (0) |
30 | #else | |
d0f2c4c6 | 31 | #define DPRINTF(fmt, ...) \ |
065e2813 AL |
32 | do { } while (0) |
33 | #endif | |
34 | ||
22f00a44 | 35 | static int file_errno(MigrationState *s) |
065e2813 AL |
36 | { |
37 | return errno; | |
38 | } | |
39 | ||
22f00a44 | 40 | static int file_write(MigrationState *s, const void * buf, size_t size) |
065e2813 AL |
41 | { |
42 | return write(s->fd, buf, size); | |
43 | } | |
44 | ||
22f00a44 | 45 | static int exec_close(MigrationState *s) |
065e2813 | 46 | { |
41ef56e6 | 47 | int ret = 0; |
d0f2c4c6 | 48 | DPRINTF("exec_close\n"); |
065e2813 | 49 | if (s->opaque) { |
41ef56e6 | 50 | ret = qemu_fclose(s->opaque); |
065e2813 AL |
51 | s->opaque = NULL; |
52 | s->fd = -1; | |
e375fe34 EH |
53 | if (ret >= 0 && !(WIFEXITED(ret) && WEXITSTATUS(ret) == 0)) { |
54 | /* close succeeded, but non-zero exit code: */ | |
55 | ret = -EIO; /* fake errno value */ | |
41ef56e6 | 56 | } |
065e2813 | 57 | } |
41ef56e6 | 58 | return ret; |
065e2813 AL |
59 | } |
60 | ||
07af4452 | 61 | int exec_start_outgoing_migration(MigrationState *s, const char *command) |
065e2813 | 62 | { |
065e2813 AL |
63 | FILE *f; |
64 | ||
065e2813 AL |
65 | f = popen(command, "w"); |
66 | if (f == NULL) { | |
d0f2c4c6 | 67 | DPRINTF("Unable to popen exec target\n"); |
07af4452 | 68 | goto err_after_popen; |
065e2813 AL |
69 | } |
70 | ||
71 | s->fd = fileno(f); | |
72 | if (s->fd == -1) { | |
d0f2c4c6 | 73 | DPRINTF("Unable to retrieve file descriptor for popen'd handle\n"); |
065e2813 AL |
74 | goto err_after_open; |
75 | } | |
76 | ||
90750009 | 77 | socket_set_nonblock(s->fd); |
065e2813 AL |
78 | |
79 | s->opaque = qemu_popen(f, "w"); | |
80 | ||
8ad9fa5d | 81 | s->close = exec_close; |
065e2813 AL |
82 | s->get_error = file_errno; |
83 | s->write = file_write; | |
065e2813 AL |
84 | |
85 | migrate_fd_connect(s); | |
07af4452 | 86 | return 0; |
065e2813 AL |
87 | |
88 | err_after_open: | |
89 | pclose(f); | |
07af4452 JQ |
90 | err_after_popen: |
91 | return -1; | |
065e2813 AL |
92 | } |
93 | ||
8a43b1ea | 94 | static void exec_accept_incoming_migration(void *opaque) |
065e2813 | 95 | { |
8a43b1ea | 96 | QEMUFile *f = opaque; |
065e2813 | 97 | |
511c0231 | 98 | process_incoming_migration(f); |
cfaf6d36 | 99 | qemu_set_fd_handler2(qemu_stdio_fd(f), NULL, NULL, NULL, NULL); |
065e2813 | 100 | qemu_fclose(f); |
8a43b1ea CL |
101 | } |
102 | ||
103 | int exec_start_incoming_migration(const char *command) | |
104 | { | |
105 | QEMUFile *f; | |
106 | ||
d0f2c4c6 | 107 | DPRINTF("Attempting to start an incoming migration\n"); |
8a43b1ea CL |
108 | f = qemu_popen_cmd(command, "r"); |
109 | if(f == NULL) { | |
d0f2c4c6 | 110 | DPRINTF("Unable to apply qemu wrapper to popen file\n"); |
8a43b1ea CL |
111 | return -errno; |
112 | } | |
113 | ||
7f79dd28 | 114 | qemu_set_fd_handler2(qemu_stdio_fd(f), NULL, |
1c39e2a2 | 115 | exec_accept_incoming_migration, NULL, f); |
8a43b1ea CL |
116 | |
117 | return 0; | |
065e2813 | 118 | } |