Revision 6377af48 block/qcow2.h
| b/block/qcow2.h | ||
|---|---|---|
| 43 | 43 |
#define QCOW_OFLAG_COPIED (1LL << 63) |
| 44 | 44 |
/* indicate that the cluster is compressed (they never have the copied flag) */ |
| 45 | 45 |
#define QCOW_OFLAG_COMPRESSED (1LL << 62) |
| 46 |
/* The cluster reads as all zeros */ |
|
| 47 |
#define QCOW_OFLAG_ZERO (1LL << 0) |
|
| 46 | 48 |
|
| 47 | 49 |
#define REFCOUNT_SHIFT 1 /* refcount size is 2 bytes */ |
| 48 | 50 |
|
| ... | ... | |
| 184 | 186 |
QCOW2_CLUSTER_UNALLOCATED, |
| 185 | 187 |
QCOW2_CLUSTER_NORMAL, |
| 186 | 188 |
QCOW2_CLUSTER_COMPRESSED, |
| 189 |
QCOW2_CLUSTER_ZERO |
|
| 187 | 190 |
}; |
| 188 | 191 |
|
| 189 | 192 |
#define L1E_OFFSET_MASK 0x00ffffffffffff00ULL |
| ... | ... | |
| 213 | 216 |
{
|
| 214 | 217 |
if (l2_entry & QCOW_OFLAG_COMPRESSED) {
|
| 215 | 218 |
return QCOW2_CLUSTER_COMPRESSED; |
| 219 |
} else if (l2_entry & QCOW_OFLAG_ZERO) {
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|
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return QCOW2_CLUSTER_ZERO; |
|
| 216 | 221 |
} else if (!(l2_entry & L2E_OFFSET_MASK)) {
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| 217 | 222 |
return QCOW2_CLUSTER_UNALLOCATED; |
| 218 | 223 |
} else {
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