mc146818rtc: Handle host clock resets

[qemu.git] / migration-exec.c

diff --git a/migration-exec.c b/migration-exec.c
index e2e6e8920ac12f2cb04047aafee787894797275e..4b7aad8b6b599477bf19aa38d06b78d96c2db659 100644 (file)
--- a/migration-exec.c
+++ b/migration-exec.c
@@ -17,18 +17,18 @@
 #include "qemu_socket.h"
 #include "migration.h"
 #include "qemu-char.h"
-#include "sysemu.h"
-#include "monitor.h"
 #include "buffered_file.h"
 #include "block.h"
+#include <sys/types.h>
+#include <sys/wait.h>
 
 //#define DEBUG_MIGRATION_EXEC
 
 #ifdef DEBUG_MIGRATION_EXEC
-#define dprintf(fmt, ...) \
+#define DPRINTF(fmt, ...) \
     do { printf("migration-exec: " fmt, ## __VA_ARGS__); } while (0)
 #else
-#define dprintf(fmt, ...) \
+#define DPRINTF(fmt, ...) \
     do { } while (0)
 #endif
 
@@ -44,18 +44,29 @@ static int file_write(FdMigrationState *s, const void * buf, size_t size)
 
 static int exec_close(FdMigrationState *s)
 {
-    dprintf("exec_close\n");
+    int ret = 0;
+    DPRINTF("exec_close\n");
     if (s->opaque) {
-        qemu_fclose(s->opaque);
+        ret = qemu_fclose(s->opaque);
         s->opaque = NULL;
         s->fd = -1;
+        if (ret != -1 &&
+            WIFEXITED(ret)
+            && WEXITSTATUS(ret) == 0) {
+            ret = 0;
+        } else {
+            ret = -1;
+        }
     }
-    return 0;
+    return ret;
 }
 
-MigrationState *exec_start_outgoing_migration(const char *command,
-                                             int64_t bandwidth_limit,
-                                             int async)
+MigrationState *exec_start_outgoing_migration(Monitor *mon,
+                                              const char *command,
+                                             int64_t bandwidth_limit,
+                                             int detach,
+                                             int blk,
+                                             int inc)
 {
     FdMigrationState *s;
     FILE *f;
@@ -64,20 +75,17 @@ MigrationState *exec_start_outgoing_migration(const char *command,
 
     f = popen(command, "w");
     if (f == NULL) {
-        dprintf("Unable to popen exec target\n");
+        DPRINTF("Unable to popen exec target\n");
         goto err_after_alloc;
     }
 
     s->fd = fileno(f);
     if (s->fd == -1) {
-        dprintf("Unable to retrieve file descriptor for popen'd handle\n");
+        DPRINTF("Unable to retrieve file descriptor for popen'd handle\n");
         goto err_after_open;
     }
 
-    if (fcntl(s->fd, F_SETFD, O_NONBLOCK) == -1) {
-        dprintf("Unable to set nonblocking mode on file descriptor\n");
-        goto err_after_open;
-    }
+    socket_set_nonblock(s->fd);
 
     s->opaque = qemu_popen(f, "w");
 
@@ -88,14 +96,15 @@ MigrationState *exec_start_outgoing_migration(const char *command,
     s->mig_state.get_status = migrate_fd_get_status;
     s->mig_state.release = migrate_fd_release;
 
+    s->mig_state.blk = blk;
+    s->mig_state.shared = inc;
+
     s->state = MIG_STATE_ACTIVE;
-    s->detach = !async;
+    s->mon = NULL;
     s->bandwidth_limit = bandwidth_limit;
 
-    if (s->detach == 1) {
-        dprintf("detaching from monitor\n");
-        monitor_suspend(cur_mon);
-        s->detach = 2;
+    if (!detach) {
+        migrate_fd_monitor_suspend(s, mon);
     }
 
     migrate_fd_connect(s);
@@ -108,30 +117,28 @@ err_after_alloc:
     return NULL;
 }
 
+static void exec_accept_incoming_migration(void *opaque)
+{
+    QEMUFile *f = opaque;
+
+    process_incoming_migration(f);
+    qemu_set_fd_handler2(qemu_stdio_fd(f), NULL, NULL, NULL, NULL);
+    qemu_fclose(f);
+}
+
 int exec_start_incoming_migration(const char *command)
 {
-    int ret;
     QEMUFile *f;
 
-    dprintf("Attempting to start an incoming migration\n");
+    DPRINTF("Attempting to start an incoming migration\n");
     f = qemu_popen_cmd(command, "r");
     if(f == NULL) {
-        dprintf("Unable to apply qemu wrapper to popen file\n");
+        DPRINTF("Unable to apply qemu wrapper to popen file\n");
         return -errno;
     }
-    vm_stop(0); /* just in case */
-    ret = qemu_loadvm_state(f);
-    if (ret < 0) {
-        fprintf(stderr, "load of migration failed\n");
-        goto err;
-    }
-    qemu_announce_self();
-    dprintf("successfully loaded vm state\n");
-    vm_start();
-    qemu_fclose(f);
-    return 0;
 
-err:
-    qemu_fclose(f);
-    return -errno;
+    qemu_set_fd_handler2(qemu_stdio_fd(f), NULL,
+                        exec_accept_incoming_migration, NULL, f);
+
+    return 0;
 }