block.c (004915a96a7a40e942ac85e6d22518cbcd283506) block.c (e2dd273754eb9a47c33660b4e14074e8e96ada4d)
1/*
2 * QEMU System Emulator block driver
3 *
4 * Copyright (c) 2003 Fabrice Bellard
5 * Copyright (c) 2020 Virtuozzo International GmbH.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 * of this software and associated documentation files (the "Software"), to deal

--- 5750 unchanged lines hidden (view full) ---

5759/*
5760 * Return values:
5761 * 0 - success
5762 * -EINVAL - backing format specified, but no file
5763 * -ENOSPC - can't update the backing file because no space is left in the
5764 * image file header
5765 * -ENOTSUP - format driver doesn't support changing the backing file
5766 */
1/*
2 * QEMU System Emulator block driver
3 *
4 * Copyright (c) 2003 Fabrice Bellard
5 * Copyright (c) 2020 Virtuozzo International GmbH.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 * of this software and associated documentation files (the "Software"), to deal

--- 5750 unchanged lines hidden (view full) ---

5759/*
5760 * Return values:
5761 * 0 - success
5762 * -EINVAL - backing format specified, but no file
5763 * -ENOSPC - can't update the backing file because no space is left in the
5764 * image file header
5765 * -ENOTSUP - format driver doesn't support changing the backing file
5766 */
5767int bdrv_change_backing_file(BlockDriverState *bs, const char *backing_file,
5768 const char *backing_fmt, bool require)
5767int coroutine_fn
5768bdrv_co_change_backing_file(BlockDriverState *bs, const char *backing_file,
5769 const char *backing_fmt, bool require)
5769{
5770 BlockDriver *drv = bs->drv;
5771 int ret;
5772
5770{
5771 BlockDriver *drv = bs->drv;
5772 int ret;
5773
5773 GLOBAL_STATE_CODE();
5774 IO_CODE();
5774
5775 if (!drv) {
5776 return -ENOMEDIUM;
5777 }
5778
5779 /* Backing file format doesn't make sense without a backing file */
5780 if (backing_fmt && !backing_file) {
5781 return -EINVAL;
5782 }
5783
5784 if (require && backing_file && !backing_fmt) {
5785 return -EINVAL;
5786 }
5787
5775
5776 if (!drv) {
5777 return -ENOMEDIUM;
5778 }
5779
5780 /* Backing file format doesn't make sense without a backing file */
5781 if (backing_fmt && !backing_file) {
5782 return -EINVAL;
5783 }
5784
5785 if (require && backing_file && !backing_fmt) {
5786 return -EINVAL;
5787 }
5788
5788 if (drv->bdrv_change_backing_file != NULL) {
5789 ret = drv->bdrv_change_backing_file(bs, backing_file, backing_fmt);
5789 if (drv->bdrv_co_change_backing_file != NULL) {
5790 ret = drv->bdrv_co_change_backing_file(bs, backing_file, backing_fmt);
5790 } else {
5791 ret = -ENOTSUP;
5792 }
5793
5794 if (ret == 0) {
5795 pstrcpy(bs->backing_file, sizeof(bs->backing_file), backing_file ?: "");
5796 pstrcpy(bs->backing_format, sizeof(bs->backing_format), backing_fmt ?: "");
5797 pstrcpy(bs->auto_backing_file, sizeof(bs->auto_backing_file),

--- 2840 unchanged lines hidden --- 		5791 } else {
5792 ret = -ENOTSUP;
5793 }
5794
5795 if (ret == 0) {
5796 pstrcpy(bs->backing_file, sizeof(bs->backing_file), backing_file ?: "");
5797 pstrcpy(bs->backing_format, sizeof(bs->backing_format), backing_fmt ?: "");
5798 pstrcpy(bs->auto_backing_file, sizeof(bs->auto_backing_file),

--- 2840 unchanged lines hidden ---