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