Revision 0e69c543 block/vmdk.c
| b/block/vmdk.c | ||
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| 514 | 514 |
/* 128 sectors * 512 bytes each = grain size 64KB */ |
| 515 | 515 |
uint8_t whole_grain[extent->cluster_sectors * 512]; |
| 516 | 516 |
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// we will be here if it's first write on non-exist grain(cluster).
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// try to read from parent image, if exist
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/* we will be here if it's first write on non-exist grain(cluster).
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* try to read from parent image, if exist */
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if (bs->backing_hd) {
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| 520 | 520 |
int ret; |
| 521 | 521 |
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| 522 | 522 |
if (!vmdk_is_cid_valid(bs)) |
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return -1; |
| 524 | 524 |
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/* floor offset to cluster */ |
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offset -= offset % (extent->cluster_sectors * 512); |
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ret = bdrv_read(bs->backing_hd, offset >> 9, whole_grain, |
| 526 | 528 |
extent->cluster_sectors); |
| 527 | 529 |
if (ret < 0) {
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| 528 | 530 |
return -1; |
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} |
| 530 | 532 |
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//Write grain only into the active image
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/* Write grain only into the active image */
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ret = bdrv_write(extent->file, cluster_offset, whole_grain, |
| 533 | 535 |
extent->cluster_sectors); |
| 534 | 536 |
if (ret < 0) {
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