aliguori | 065e281 | 2008-11-11 16:46:33 +0000 | [diff] [blame] | 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" |
aliguori | 065e281 | 2008-11-11 16:46:33 +0000 | [diff] [blame] | 20 | #include "buffered_file.h" |
| 21 | #include "block.h" |
Blue Swirl | 0ffbba3 | 2010-06-04 20:01:07 +0000 | [diff] [blame] | 22 | #include <sys/types.h> |
| 23 | #include <sys/wait.h> |
aliguori | 065e281 | 2008-11-11 16:46:33 +0000 | [diff] [blame] | 24 | |
| 25 | //#define DEBUG_MIGRATION_EXEC |
| 26 | |
| 27 | #ifdef DEBUG_MIGRATION_EXEC |
malc | d0f2c4c | 2010-02-07 02:03:50 +0300 | [diff] [blame] | 28 | #define DPRINTF(fmt, ...) \ |
aliguori | 065e281 | 2008-11-11 16:46:33 +0000 | [diff] [blame] | 29 | do { printf("migration-exec: " fmt, ## __VA_ARGS__); } while (0) |
| 30 | #else |
malc | d0f2c4c | 2010-02-07 02:03:50 +0300 | [diff] [blame] | 31 | #define DPRINTF(fmt, ...) \ |
aliguori | 065e281 | 2008-11-11 16:46:33 +0000 | [diff] [blame] | 32 | do { } while (0) |
| 33 | #endif |
| 34 | |
| 35 | static int file_errno(FdMigrationState *s) |
| 36 | { |
| 37 | return errno; |
| 38 | } |
| 39 | |
| 40 | static int file_write(FdMigrationState *s, const void * buf, size_t size) |
| 41 | { |
| 42 | return write(s->fd, buf, size); |
| 43 | } |
| 44 | |
| 45 | static int exec_close(FdMigrationState *s) |
| 46 | { |
Anthony Liguori | 41ef56e | 2010-06-02 14:55:25 -0500 | [diff] [blame] | 47 | int ret = 0; |
malc | d0f2c4c | 2010-02-07 02:03:50 +0300 | [diff] [blame] | 48 | DPRINTF("exec_close\n"); |
aliguori | 065e281 | 2008-11-11 16:46:33 +0000 | [diff] [blame] | 49 | if (s->opaque) { |
Anthony Liguori | 41ef56e | 2010-06-02 14:55:25 -0500 | [diff] [blame] | 50 | ret = qemu_fclose(s->opaque); |
aliguori | 065e281 | 2008-11-11 16:46:33 +0000 | [diff] [blame] | 51 | s->opaque = NULL; |
| 52 | s->fd = -1; |
Anthony Liguori | 41ef56e | 2010-06-02 14:55:25 -0500 | [diff] [blame] | 53 | if (ret != -1 && |
| 54 | WIFEXITED(ret) |
| 55 | && WEXITSTATUS(ret) == 0) { |
| 56 | ret = 0; |
| 57 | } else { |
| 58 | ret = -1; |
| 59 | } |
aliguori | 065e281 | 2008-11-11 16:46:33 +0000 | [diff] [blame] | 60 | } |
Anthony Liguori | 41ef56e | 2010-06-02 14:55:25 -0500 | [diff] [blame] | 61 | return ret; |
aliguori | 065e281 | 2008-11-11 16:46:33 +0000 | [diff] [blame] | 62 | } |
| 63 | |
Jan Kiszka | f327aa0 | 2009-11-30 18:21:21 +0100 | [diff] [blame] | 64 | MigrationState *exec_start_outgoing_migration(Monitor *mon, |
| 65 | const char *command, |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 66 | int64_t bandwidth_limit, |
| 67 | int detach, |
| 68 | int blk, |
| 69 | int inc) |
aliguori | 065e281 | 2008-11-11 16:46:33 +0000 | [diff] [blame] | 70 | { |
| 71 | FdMigrationState *s; |
| 72 | FILE *f; |
| 73 | |
| 74 | s = qemu_mallocz(sizeof(*s)); |
aliguori | 065e281 | 2008-11-11 16:46:33 +0000 | [diff] [blame] | 75 | |
| 76 | f = popen(command, "w"); |
| 77 | if (f == NULL) { |
malc | d0f2c4c | 2010-02-07 02:03:50 +0300 | [diff] [blame] | 78 | DPRINTF("Unable to popen exec target\n"); |
aliguori | 065e281 | 2008-11-11 16:46:33 +0000 | [diff] [blame] | 79 | goto err_after_alloc; |
| 80 | } |
| 81 | |
| 82 | s->fd = fileno(f); |
| 83 | if (s->fd == -1) { |
malc | d0f2c4c | 2010-02-07 02:03:50 +0300 | [diff] [blame] | 84 | DPRINTF("Unable to retrieve file descriptor for popen'd handle\n"); |
aliguori | 065e281 | 2008-11-11 16:46:33 +0000 | [diff] [blame] | 85 | goto err_after_open; |
| 86 | } |
| 87 | |
Chris Lalancette | 9075000 | 2009-08-05 17:07:35 +0200 | [diff] [blame] | 88 | socket_set_nonblock(s->fd); |
aliguori | 065e281 | 2008-11-11 16:46:33 +0000 | [diff] [blame] | 89 | |
| 90 | s->opaque = qemu_popen(f, "w"); |
| 91 | |
aliguori | 8ad9fa5 | 2008-11-12 22:29:11 +0000 | [diff] [blame] | 92 | s->close = exec_close; |
aliguori | 065e281 | 2008-11-11 16:46:33 +0000 | [diff] [blame] | 93 | s->get_error = file_errno; |
| 94 | s->write = file_write; |
| 95 | s->mig_state.cancel = migrate_fd_cancel; |
| 96 | s->mig_state.get_status = migrate_fd_get_status; |
| 97 | s->mig_state.release = migrate_fd_release; |
| 98 | |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 99 | s->mig_state.blk = blk; |
| 100 | s->mig_state.shared = inc; |
Jan Kiszka | f327aa0 | 2009-11-30 18:21:21 +0100 | [diff] [blame] | 101 | |
aliguori | 065e281 | 2008-11-11 16:46:33 +0000 | [diff] [blame] | 102 | s->state = MIG_STATE_ACTIVE; |
Jan Kiszka | f327aa0 | 2009-11-30 18:21:21 +0100 | [diff] [blame] | 103 | s->mon = NULL; |
aliguori | 065e281 | 2008-11-11 16:46:33 +0000 | [diff] [blame] | 104 | s->bandwidth_limit = bandwidth_limit; |
| 105 | |
Jan Kiszka | f327aa0 | 2009-11-30 18:21:21 +0100 | [diff] [blame] | 106 | if (!detach) { |
| 107 | migrate_fd_monitor_suspend(s, mon); |
| 108 | } |
aliguori | 065e281 | 2008-11-11 16:46:33 +0000 | [diff] [blame] | 109 | |
| 110 | migrate_fd_connect(s); |
| 111 | return &s->mig_state; |
| 112 | |
| 113 | err_after_open: |
| 114 | pclose(f); |
| 115 | err_after_alloc: |
| 116 | qemu_free(s); |
aliguori | 065e281 | 2008-11-11 16:46:33 +0000 | [diff] [blame] | 117 | return NULL; |
| 118 | } |
| 119 | |
Chris Lalancette | 8a43b1e | 2009-05-25 16:38:23 +0200 | [diff] [blame] | 120 | static void exec_accept_incoming_migration(void *opaque) |
aliguori | 065e281 | 2008-11-11 16:46:33 +0000 | [diff] [blame] | 121 | { |
Chris Lalancette | 8a43b1e | 2009-05-25 16:38:23 +0200 | [diff] [blame] | 122 | QEMUFile *f = opaque; |
aliguori | 065e281 | 2008-11-11 16:46:33 +0000 | [diff] [blame] | 123 | |
Juan Quintela | 511c023 | 2010-06-09 14:10:55 +0200 | [diff] [blame] | 124 | process_incoming_migration(f); |
Juan Quintela | cfaf6d3 | 2010-03-10 00:10:35 +0100 | [diff] [blame] | 125 | qemu_set_fd_handler2(qemu_stdio_fd(f), NULL, NULL, NULL, NULL); |
aliguori | 065e281 | 2008-11-11 16:46:33 +0000 | [diff] [blame] | 126 | qemu_fclose(f); |
Chris Lalancette | 8a43b1e | 2009-05-25 16:38:23 +0200 | [diff] [blame] | 127 | } |
| 128 | |
| 129 | int exec_start_incoming_migration(const char *command) |
| 130 | { |
| 131 | QEMUFile *f; |
| 132 | |
malc | d0f2c4c | 2010-02-07 02:03:50 +0300 | [diff] [blame] | 133 | DPRINTF("Attempting to start an incoming migration\n"); |
Chris Lalancette | 8a43b1e | 2009-05-25 16:38:23 +0200 | [diff] [blame] | 134 | f = qemu_popen_cmd(command, "r"); |
| 135 | if(f == NULL) { |
malc | d0f2c4c | 2010-02-07 02:03:50 +0300 | [diff] [blame] | 136 | DPRINTF("Unable to apply qemu wrapper to popen file\n"); |
Chris Lalancette | 8a43b1e | 2009-05-25 16:38:23 +0200 | [diff] [blame] | 137 | return -errno; |
| 138 | } |
| 139 | |
Paolo Bonzini | 7f79dd2 | 2009-08-12 14:17:35 +0200 | [diff] [blame] | 140 | qemu_set_fd_handler2(qemu_stdio_fd(f), NULL, |
Juan Quintela | 1c39e2a | 2010-03-11 17:55:38 +0100 | [diff] [blame] | 141 | exec_accept_incoming_migration, NULL, f); |
Chris Lalancette | 8a43b1e | 2009-05-25 16:38:23 +0200 | [diff] [blame] | 142 | |
| 143 | return 0; |
aliguori | 065e281 | 2008-11-11 16:46:33 +0000 | [diff] [blame] | 144 | } |