block.c (9f07429e8873124c588847b0d499cb32b9410bdd) block.c (291680186f7f8856d943793414d1b8df6c562fc4)
1/*
2 * QEMU System Emulator block driver
3 *
4 * Copyright (c) 2003 Fabrice Bellard
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights

--- 5645 unchanged lines hidden (view full) ---

5654 }
5655
5656 // The size for the image must always be specified, with one exception:
5657 // If we are using a backing file, we can obtain the size from there
5658 size = qemu_opt_get_size(opts, BLOCK_OPT_SIZE, 0);
5659 if (size == -1) {
5660 if (backing_file) {
5661 BlockDriverState *bs;
1/*
2 * QEMU System Emulator block driver
3 *
4 * Copyright (c) 2003 Fabrice Bellard
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights

--- 5645 unchanged lines hidden (view full) ---

5654 }
5655
5656 // The size for the image must always be specified, with one exception:
5657 // If we are using a backing file, we can obtain the size from there
5658 size = qemu_opt_get_size(opts, BLOCK_OPT_SIZE, 0);
5659 if (size == -1) {
5660 if (backing_file) {
5661 BlockDriverState *bs;
5662 char *full_backing = g_new0(char, PATH_MAX);
5662 int64_t size;
5663 int back_flags;
5664
5663 int64_t size;
5664 int back_flags;
5665
5666 bdrv_get_full_backing_filename_from_filename(filename, backing_file,
5667 full_backing, PATH_MAX,
5668 &local_err);
5669 if (local_err) {
5670 g_free(full_backing);
5671 goto out;
5672 }
5673
5665 /* backing files always opened read-only */
5666 back_flags =
5667 flags & ~(BDRV_O_RDWR | BDRV_O_SNAPSHOT | BDRV_O_NO_BACKING);
5668
5669 bs = NULL;
5674 /* backing files always opened read-only */
5675 back_flags =
5676 flags & ~(BDRV_O_RDWR | BDRV_O_SNAPSHOT | BDRV_O_NO_BACKING);
5677
5678 bs = NULL;
5670 ret = bdrv_open(&bs, backing_file, NULL, NULL, back_flags,
5679 ret = bdrv_open(&bs, full_backing, NULL, NULL, back_flags,
5671 backing_drv, &local_err);
5680 backing_drv, &local_err);
5681 g_free(full_backing);
5672 if (ret < 0) {
5673 goto out;
5674 }
5675 size = bdrv_getlength(bs);
5676 if (size < 0) {
5677 error_setg_errno(errp, -size, "Could not get size of '%s'",
5678 backing_file);
5679 bdrv_unref(bs);

--- 431 unchanged lines hidden --- 		5682 if (ret < 0) {
5683 goto out;
5684 }
5685 size = bdrv_getlength(bs);
5686 if (size < 0) {
5687 error_setg_errno(errp, -size, "Could not get size of '%s'",
5688 backing_file);
5689 bdrv_unref(bs);

--- 431 unchanged lines hidden ---