trace: Remove %s in grlib trace events

[qemu.git] / blockdev.c

diff --git a/blockdev.c b/blockdev.c
index 4b2145c25b31aaedc232332a25ed61fc153f3ff2..5429621f0c29745509739f9b996a92e1d34754ef 100644 (file)
--- a/blockdev.c
+++ b/blockdev.c
@@ -71,7 +71,7 @@ void blockdev_auto_del(BlockDriverState *bs)
     DriveInfo *dinfo = drive_get_by_blockdev(bs);
 
     if (dinfo && dinfo->auto_del) {
-        drive_uninit(dinfo);
+        drive_put_ref(dinfo);
     }
 }
 
@@ -178,14 +178,28 @@ static void bdrv_format_print(void *opaque, const char *name)
     error_printf(" %s", name);
 }
 
-void drive_uninit(DriveInfo *dinfo)
+static void drive_uninit(DriveInfo *dinfo)
 {
     qemu_opts_del(dinfo->opts);
     bdrv_delete(dinfo->bdrv);
+    qemu_free(dinfo->id);
     QTAILQ_REMOVE(&drives, dinfo, next);
     qemu_free(dinfo);
 }
 
+void drive_put_ref(DriveInfo *dinfo)
+{
+    assert(dinfo->refcount);
+    if (--dinfo->refcount == 0) {
+        drive_uninit(dinfo);
+    }
+}
+
+void drive_get_ref(DriveInfo *dinfo)
+{
+    dinfo->refcount++;
+}
+
 static int parse_block_error_action(const char *buf, int is_read)
 {
     if (!strcmp(buf, "ignore")) {
@@ -203,7 +217,7 @@ static int parse_block_error_action(const char *buf, int is_read)
     }
 }
 
-DriveInfo *drive_init(QemuOpts *opts, int default_to_scsi, int *fatal_error)
+DriveInfo *drive_init(QemuOpts *opts, int default_to_scsi)
 {
     const char *buf;
     const char *file = NULL;
@@ -225,8 +239,6 @@ DriveInfo *drive_init(QemuOpts *opts, int default_to_scsi, int *fatal_error)
     int snapshot = 0;
     int ret;
 
-    *fatal_error = 1;
-
     translation = BIOS_ATA_TRANSLATION_AUTO;
 
     if (default_to_scsi) {
@@ -455,6 +467,7 @@ DriveInfo *drive_init(QemuOpts *opts, int default_to_scsi, int *fatal_error)
     dinfo->bus = bus_id;
     dinfo->unit = unit_id;
     dinfo->opts = opts;
+    dinfo->refcount = 1;
     if (serial)
         strncpy(dinfo->serial, serial, sizeof(dinfo->serial) - 1);
     QTAILQ_INSERT_TAIL(&drives, dinfo, next);
@@ -490,7 +503,7 @@ DriveInfo *drive_init(QemuOpts *opts, int default_to_scsi, int *fatal_error)
     case IF_VIRTIO:
         /* add virtio block device */
         opts = qemu_opts_create(qemu_find_opts("device"), NULL, 0);
-        qemu_opt_set(opts, "driver", "virtio-blk-pci");
+        qemu_opt_set(opts, "driver", "virtio-blk");
         qemu_opt_set(opts, "drive", dinfo->id);
         if (devaddr)
             qemu_opt_set(opts, "addr", devaddr);
@@ -499,8 +512,7 @@ DriveInfo *drive_init(QemuOpts *opts, int default_to_scsi, int *fatal_error)
         abort();
     }
     if (!file || !*file) {
-        *fatal_error = 0;
-        return NULL;
+        return dinfo;
     }
     if (snapshot) {
         /* always use cache=unsafe with snapshot */
@@ -514,7 +526,7 @@ DriveInfo *drive_init(QemuOpts *opts, int default_to_scsi, int *fatal_error)
     } else if (ro == 1) {
         if (type != IF_SCSI && type != IF_VIRTIO && type != IF_FLOPPY && type != IF_NONE) {
             error_report("readonly not supported by this bus type");
-            return NULL;
+            goto err;
         }
     }
 
@@ -524,13 +536,19 @@ DriveInfo *drive_init(QemuOpts *opts, int default_to_scsi, int *fatal_error)
     if (ret < 0) {
         error_report("could not open disk image %s: %s",
                      file, strerror(-ret));
-        return NULL;
+        goto err;
     }
 
     if (bdrv_key_required(dinfo->bdrv))
         autostart = 0;
-    *fatal_error = 0;
     return dinfo;
+
+err:
+    bdrv_delete(dinfo->bdrv);
+    qemu_free(dinfo->id);
+    QTAILQ_REMOVE(&drives, dinfo, next);
+    qemu_free(dinfo);
+    return NULL;
 }
 
 void do_commit(Monitor *mon, const QDict *qdict)
@@ -556,9 +574,10 @@ int do_snapshot_blkdev(Monitor *mon, const QDict *qdict, QObject **ret_data)
     const char *filename = qdict_get_try_str(qdict, "snapshot_file");
     const char *format = qdict_get_try_str(qdict, "format");
     BlockDriverState *bs;
-    BlockDriver *drv, *proto_drv;
+    BlockDriver *drv, *old_drv, *proto_drv;
     int ret = 0;
     int flags;
+    char old_filename[1024];
 
     if (!filename) {
         qerror_report(QERR_MISSING_PARAMETER, "snapshot_file");
@@ -573,6 +592,11 @@ int do_snapshot_blkdev(Monitor *mon, const QDict *qdict, QObject **ret_data)
         goto out;
     }
 
+    pstrcpy(old_filename, sizeof(old_filename), bs->filename);
+
+    old_drv = bs->drv;
+    flags = bs->open_flags;
+
     if (!format) {
         format = "qcow2";
     }
@@ -592,7 +616,7 @@ int do_snapshot_blkdev(Monitor *mon, const QDict *qdict, QObject **ret_data)
     }
 
     ret = bdrv_img_create(filename, format, bs->filename,
-                          bs->drv->format_name, NULL, -1, bs->open_flags);
+                          bs->drv->format_name, NULL, -1, flags);
     if (ret) {
         goto out;
     }
@@ -600,15 +624,20 @@ int do_snapshot_blkdev(Monitor *mon, const QDict *qdict, QObject **ret_data)
     qemu_aio_flush();
     bdrv_flush(bs);
 
-    flags = bs->open_flags;
     bdrv_close(bs);
     ret = bdrv_open(bs, filename, flags, drv);
     /*
-     * If reopening the image file we just created fails, we really
-     * are in trouble :(
+     * If reopening the image file we just created fails, fall back
+     * and try to re-open the original image. If that fails too, we
+     * are in serious trouble.
      */
     if (ret != 0) {
-        abort();
+        ret = bdrv_open(bs, old_filename, flags, old_drv);
+        if (ret != 0) {
+            qerror_report(QERR_OPEN_FILE_FAILED, old_filename);
+        } else {
+            qerror_report(QERR_OPEN_FILE_FAILED, filename);
+        }
     }
 out:
     if (ret) {
@@ -708,38 +737,33 @@ int do_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data)
 {
     const char *id = qdict_get_str(qdict, "id");
     BlockDriverState *bs;
-    BlockDriverState **ptr;
-    Property *prop;
 
     bs = bdrv_find(id);
     if (!bs) {
         qerror_report(QERR_DEVICE_NOT_FOUND, id);
         return -1;
     }
+    if (bdrv_in_use(bs)) {
+        qerror_report(QERR_DEVICE_IN_USE, id);
+        return -1;
+    }
 
     /* quiesce block driver; prevent further io */
     qemu_aio_flush();
     bdrv_flush(bs);
     bdrv_close(bs);
 
-    /* clean up guest state from pointing to host resource by
-     * finding and removing DeviceState "drive" property */
+    /* if we have a device associated with this BlockDriverState (bs->peer)
+     * then we need to make the drive anonymous until the device
+     * can be removed.  If this is a drive with no device backing
+     * then we can just get rid of the block driver state right here.
+     */
     if (bs->peer) {
-        for (prop = bs->peer->info->props; prop && prop->name; prop++) {
-            if (prop->info->type == PROP_TYPE_DRIVE) {
-                ptr = qdev_get_prop_ptr(bs->peer, prop);
-                if (*ptr == bs) {
-                    bdrv_detach(bs, bs->peer);
-                    *ptr = NULL;
-                    break;
-                }
-            }
-        }
+        bdrv_make_anon(bs);
+    } else {
+        drive_uninit(drive_get_by_blockdev(bs));
     }
 
-    /* clean up host side */
-    drive_uninit(drive_get_by_blockdev(bs));
-
     return 0;
 }