#ifndef BLOCK_QCOW2_H
#define BLOCK_QCOW2_H
-#include "block/aes.h"
+#include "qemu/aes.h"
#include "block/coroutine.h"
//#define DEBUG_ALLOC
#define QCOW_MAX_CRYPT_CLUSTERS 32
/* indicate that the refcount of the referenced cluster is exactly one. */
-#define QCOW_OFLAG_COPIED (1LL << 63)
+#define QCOW_OFLAG_COPIED (1ULL << 63)
/* indicate that the cluster is compressed (they never have the copied flag) */
-#define QCOW_OFLAG_COMPRESSED (1LL << 62)
+#define QCOW_OFLAG_COMPRESSED (1ULL << 62)
/* The cluster reads as all zeros */
-#define QCOW_OFLAG_ZERO (1LL << 0)
+#define QCOW_OFLAG_ZERO (1ULL << 0)
#define REFCOUNT_SHIFT 1 /* refcount size is 2 bytes */
#define DEFAULT_CLUSTER_SIZE 65536
-#define QCOW2_OPT_LAZY_REFCOUNTS "lazy_refcounts"
+#define QCOW2_OPT_LAZY_REFCOUNTS "lazy-refcounts"
+#define QCOW2_OPT_DISCARD_REQUEST "pass-discard-request"
+#define QCOW2_OPT_DISCARD_SNAPSHOT "pass-discard-snapshot"
+#define QCOW2_OPT_DISCARD_OTHER "pass-discard-other"
+#define QCOW2_OPT_OVERLAP "overlap-check"
+#define QCOW2_OPT_OVERLAP_MAIN_HEADER "overlap-check.main-header"
+#define QCOW2_OPT_OVERLAP_ACTIVE_L1 "overlap-check.active-l1"
+#define QCOW2_OPT_OVERLAP_ACTIVE_L2 "overlap-check.active-l2"
+#define QCOW2_OPT_OVERLAP_REFCOUNT_TABLE "overlap-check.refcount-table"
+#define QCOW2_OPT_OVERLAP_REFCOUNT_BLOCK "overlap-check.refcount-block"
+#define QCOW2_OPT_OVERLAP_SNAPSHOT_TABLE "overlap-check.snapshot-table"
+#define QCOW2_OPT_OVERLAP_INACTIVE_L1 "overlap-check.inactive-l1"
+#define QCOW2_OPT_OVERLAP_INACTIVE_L2 "overlap-check.inactive-l2"
typedef struct QCowHeader {
uint32_t magic;
uint32_t refcount_order;
uint32_t header_length;
-} QCowHeader;
+} QEMU_PACKED QCowHeader;
typedef struct QCowSnapshot {
uint64_t l1_table_offset;
/* Incompatible feature bits */
enum {
QCOW2_INCOMPAT_DIRTY_BITNR = 0,
+ QCOW2_INCOMPAT_CORRUPT_BITNR = 1,
QCOW2_INCOMPAT_DIRTY = 1 << QCOW2_INCOMPAT_DIRTY_BITNR,
+ QCOW2_INCOMPAT_CORRUPT = 1 << QCOW2_INCOMPAT_CORRUPT_BITNR,
- QCOW2_INCOMPAT_MASK = QCOW2_INCOMPAT_DIRTY,
+ QCOW2_INCOMPAT_MASK = QCOW2_INCOMPAT_DIRTY
+ | QCOW2_INCOMPAT_CORRUPT,
};
/* Compatible feature bits */
QCOW2_COMPAT_FEAT_MASK = QCOW2_COMPAT_LAZY_REFCOUNTS,
};
+enum qcow2_discard_type {
+ QCOW2_DISCARD_NEVER = 0,
+ QCOW2_DISCARD_ALWAYS,
+ QCOW2_DISCARD_REQUEST,
+ QCOW2_DISCARD_SNAPSHOT,
+ QCOW2_DISCARD_OTHER,
+ QCOW2_DISCARD_MAX
+};
+
typedef struct Qcow2Feature {
uint8_t type;
uint8_t bit;
char name[46];
} QEMU_PACKED Qcow2Feature;
+typedef struct Qcow2DiscardRegion {
+ BlockDriverState *bs;
+ uint64_t offset;
+ uint64_t bytes;
+ QTAILQ_ENTRY(Qcow2DiscardRegion) next;
+} Qcow2DiscardRegion;
+
typedef struct BDRVQcowState {
int cluster_bits;
int cluster_size;
int flags;
int qcow_version;
bool use_lazy_refcounts;
+ int refcount_order;
+
+ bool discard_passthrough[QCOW2_DISCARD_MAX];
+
+ int overlap_check; /* bitmask of Qcow2MetadataOverlap values */
uint64_t incompatible_features;
uint64_t compatible_features;
size_t unknown_header_fields_size;
void* unknown_header_fields;
QLIST_HEAD(, Qcow2UnknownHeaderExtension) unknown_header_ext;
+ QTAILQ_HEAD (, Qcow2DiscardRegion) discards;
+ bool cache_discards;
} BDRVQcowState;
/* XXX: use std qcow open function ? */
*/
Qcow2COWRegion cow_end;
+ /** Pointer to next L2Meta of the same write request */
+ struct QCowL2Meta *next;
+
QLIST_ENTRY(QCowL2Meta) next_in_flight;
} QCowL2Meta;
QCOW2_CLUSTER_ZERO
};
+typedef enum QCow2MetadataOverlap {
+ QCOW2_OL_MAIN_HEADER_BITNR = 0,
+ QCOW2_OL_ACTIVE_L1_BITNR = 1,
+ QCOW2_OL_ACTIVE_L2_BITNR = 2,
+ QCOW2_OL_REFCOUNT_TABLE_BITNR = 3,
+ QCOW2_OL_REFCOUNT_BLOCK_BITNR = 4,
+ QCOW2_OL_SNAPSHOT_TABLE_BITNR = 5,
+ QCOW2_OL_INACTIVE_L1_BITNR = 6,
+ QCOW2_OL_INACTIVE_L2_BITNR = 7,
+
+ QCOW2_OL_MAX_BITNR = 8,
+
+ QCOW2_OL_NONE = 0,
+ QCOW2_OL_MAIN_HEADER = (1 << QCOW2_OL_MAIN_HEADER_BITNR),
+ QCOW2_OL_ACTIVE_L1 = (1 << QCOW2_OL_ACTIVE_L1_BITNR),
+ QCOW2_OL_ACTIVE_L2 = (1 << QCOW2_OL_ACTIVE_L2_BITNR),
+ QCOW2_OL_REFCOUNT_TABLE = (1 << QCOW2_OL_REFCOUNT_TABLE_BITNR),
+ QCOW2_OL_REFCOUNT_BLOCK = (1 << QCOW2_OL_REFCOUNT_BLOCK_BITNR),
+ QCOW2_OL_SNAPSHOT_TABLE = (1 << QCOW2_OL_SNAPSHOT_TABLE_BITNR),
+ QCOW2_OL_INACTIVE_L1 = (1 << QCOW2_OL_INACTIVE_L1_BITNR),
+ /* NOTE: Checking overlaps with inactive L2 tables will result in bdrv
+ * reads. */
+ QCOW2_OL_INACTIVE_L2 = (1 << QCOW2_OL_INACTIVE_L2_BITNR),
+} QCow2MetadataOverlap;
+
+/* Perform all overlap checks which can be done in constant time */
+#define QCOW2_OL_CONSTANT \
+ (QCOW2_OL_MAIN_HEADER | QCOW2_OL_ACTIVE_L1 | QCOW2_OL_REFCOUNT_TABLE | \
+ QCOW2_OL_SNAPSHOT_TABLE)
+
+/* Perform all overlap checks which don't require disk access */
+#define QCOW2_OL_CACHED \
+ (QCOW2_OL_CONSTANT | QCOW2_OL_ACTIVE_L2 | QCOW2_OL_REFCOUNT_BLOCK | \
+ QCOW2_OL_INACTIVE_L1)
+
+/* Perform all overlap checks */
+#define QCOW2_OL_ALL \
+ (QCOW2_OL_CACHED | QCOW2_OL_INACTIVE_L2)
+
#define L1E_OFFSET_MASK 0x00ffffffffffff00ULL
#define L2E_OFFSET_MASK 0x00ffffffffffff00ULL
#define L2E_COMPRESSED_OFFSET_SIZE_MASK 0x3fffffffffffffffULL
return (size + (s->cluster_size - 1)) >> s->cluster_bits;
}
-static inline int size_to_l1(BDRVQcowState *s, int64_t size)
+static inline int64_t size_to_l1(BDRVQcowState *s, int64_t size)
{
int shift = s->cluster_bits + s->l2_bits;
return (size + (1ULL << shift) - 1) >> shift;
return offset;
}
+static inline int64_t qcow2_vm_state_offset(BDRVQcowState *s)
+{
+ return (int64_t)s->l1_vm_state_index << (s->cluster_bits + s->l2_bits);
+}
+
static inline int qcow2_get_cluster_type(uint64_t l2_entry)
{
if (l2_entry & QCOW_OFLAG_COMPRESSED) {
int64_t sector_num, int nb_sectors);
int qcow2_mark_dirty(BlockDriverState *bs);
+int qcow2_mark_corrupt(BlockDriverState *bs);
+int qcow2_mark_consistent(BlockDriverState *bs);
int qcow2_update_header(BlockDriverState *bs);
/* qcow2-refcount.c functions */
int qcow2_refcount_init(BlockDriverState *bs);
void qcow2_refcount_close(BlockDriverState *bs);
+int qcow2_update_cluster_refcount(BlockDriverState *bs, int64_t cluster_index,
+ int addend, enum qcow2_discard_type type);
+
int64_t qcow2_alloc_clusters(BlockDriverState *bs, int64_t size);
int qcow2_alloc_clusters_at(BlockDriverState *bs, uint64_t offset,
int nb_clusters);
int64_t qcow2_alloc_bytes(BlockDriverState *bs, int size);
void qcow2_free_clusters(BlockDriverState *bs,
- int64_t offset, int64_t size);
-void qcow2_free_any_clusters(BlockDriverState *bs,
- uint64_t cluster_offset, int nb_clusters);
+ int64_t offset, int64_t size,
+ enum qcow2_discard_type type);
+void qcow2_free_any_clusters(BlockDriverState *bs, uint64_t l2_entry,
+ int nb_clusters, enum qcow2_discard_type type);
int qcow2_update_snapshot_refcount(BlockDriverState *bs,
int64_t l1_table_offset, int l1_size, int addend);
int qcow2_check_refcounts(BlockDriverState *bs, BdrvCheckResult *res,
BdrvCheckMode fix);
+void qcow2_process_discards(BlockDriverState *bs, int ret);
+
+int qcow2_check_metadata_overlap(BlockDriverState *bs, int ign, int64_t offset,
+ int64_t size);
+int qcow2_pre_write_overlap_check(BlockDriverState *bs, int ign, int64_t offset,
+ int64_t size);
+
/* qcow2-cluster.c functions */
-int qcow2_grow_l1_table(BlockDriverState *bs, int min_size, bool exact_size);
+int qcow2_grow_l1_table(BlockDriverState *bs, uint64_t min_size,
+ bool exact_size);
+int qcow2_write_l1_entry(BlockDriverState *bs, int l1_index);
void qcow2_l2_cache_reset(BlockDriverState *bs);
int qcow2_decompress_cluster(BlockDriverState *bs, uint64_t cluster_offset);
void qcow2_encrypt_sectors(BDRVQcowState *s, int64_t sector_num,
int qcow2_alloc_cluster_link_l2(BlockDriverState *bs, QCowL2Meta *m);
int qcow2_discard_clusters(BlockDriverState *bs, uint64_t offset,
- int nb_sectors);
+ int nb_sectors, enum qcow2_discard_type type);
int qcow2_zero_clusters(BlockDriverState *bs, uint64_t offset, int nb_sectors);
+int qcow2_expand_zero_clusters(BlockDriverState *bs);
+
/* qcow2-snapshot.c functions */
int qcow2_snapshot_create(BlockDriverState *bs, QEMUSnapshotInfo *sn_info);
int qcow2_snapshot_goto(BlockDriverState *bs, const char *snapshot_id);
-int qcow2_snapshot_delete(BlockDriverState *bs, const char *snapshot_id);
+int qcow2_snapshot_delete(BlockDriverState *bs,
+ const char *snapshot_id,
+ const char *name,
+ Error **errp);
int qcow2_snapshot_list(BlockDriverState *bs, QEMUSnapshotInfo **psn_tab);
int qcow2_snapshot_load_tmp(BlockDriverState *bs, const char *snapshot_name);
Qcow2Cache *dependency);
void qcow2_cache_depends_on_flush(Qcow2Cache *c);
+int qcow2_cache_empty(BlockDriverState *bs, Qcow2Cache *c);
+
int qcow2_cache_get(BlockDriverState *bs, Qcow2Cache *c, uint64_t offset,
void **table);
int qcow2_cache_get_empty(BlockDriverState *bs, Qcow2Cache *c, uint64_t offset,
projects / qemu.git / blobdiff