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 * Contributions after 2012-01-13 are licensed under the terms of the 15 * GNU GPL, version 2 or (at your option) any later version. 16 */ 17 18 #include "qemu/osdep.h" 19 #include "qapi/error.h" 20 #include "qemu-common.h" 21 #include "qemu/sockets.h" 22 #include "qemu/main-loop.h" 23 #include "migration/migration.h" 24 #include "migration/qemu-file.h" 25 #include "block/block.h" 26 #include <sys/wait.h> 27 28 //#define DEBUG_MIGRATION_EXEC 29 30 #ifdef DEBUG_MIGRATION_EXEC 31 #define DPRINTF(fmt, ...) \ 32 do { printf("migration-exec: " fmt, ## __VA_ARGS__); } while (0) 33 #else 34 #define DPRINTF(fmt, ...) \ 35 do { } while (0) 36 #endif 37 38 void exec_start_outgoing_migration(MigrationState *s, const char *command, Error **errp) 39 { 40 s->to_dst_file = qemu_popen_cmd(command, "w"); 41 if (s->to_dst_file == NULL) { 42 error_setg_errno(errp, errno, "failed to popen the migration target"); 43 return; 44 } 45 46 migrate_fd_connect(s); 47 } 48 49 static void exec_accept_incoming_migration(void *opaque) 50 { 51 QEMUFile *f = opaque; 52 53 qemu_set_fd_handler(qemu_get_fd(f), NULL, NULL, NULL); 54 process_incoming_migration(f); 55 } 56 57 void exec_start_incoming_migration(const char *command, Error **errp) 58 { 59 QEMUFile *f; 60 61 DPRINTF("Attempting to start an incoming migration\n"); 62 f = qemu_popen_cmd(command, "r"); 63 if(f == NULL) { 64 error_setg_errno(errp, errno, "failed to popen the migration source"); 65 return; 66 } 67 68 qemu_set_fd_handler(qemu_get_fd(f), exec_accept_incoming_migration, NULL, 69 f); 70 } 71