#ifndef BLOCK_QCOW2_H
#define BLOCK_QCOW2_H
-#include "crypto/cipher.h"
+#include "crypto/block.h"
#include "qemu/coroutine.h"
//#define DEBUG_ALLOC
#define QCOW_CRYPT_NONE 0
#define QCOW_CRYPT_AES 1
+#define QCOW_CRYPT_LUKS 2
#define QCOW_MAX_CRYPT_CLUSTERS 32
#define QCOW_MAX_SNAPSHOTS 65536
* space for snapshot names and IDs */
#define QCOW_MAX_SNAPSHOTS_SIZE (1024 * QCOW_MAX_SNAPSHOTS)
+/* Bitmap header extension constraints */
+#define QCOW2_MAX_BITMAPS 65535
+#define QCOW2_MAX_BITMAP_DIRECTORY_SIZE (1024 * QCOW2_MAX_BITMAPS)
+
/* indicate that the refcount of the referenced cluster is exactly one. */
#define QCOW_OFLAG_COPIED (1ULL << 63)
/* indicate that the cluster is compressed (they never have the copied flag) */
#define MAX_CLUSTER_BITS 21
/* Must be at least 2 to cover COW */
-#define MIN_L2_CACHE_SIZE 2 /* clusters */
+#define MIN_L2_CACHE_SIZE 2 /* cache entries */
/* Must be at least 4 to cover all cases of refcount table growth */
#define MIN_REFCOUNT_CACHE_SIZE 4 /* clusters */
#define QCOW2_OPT_OVERLAP_INACTIVE_L2 "overlap-check.inactive-l2"
#define QCOW2_OPT_CACHE_SIZE "cache-size"
#define QCOW2_OPT_L2_CACHE_SIZE "l2-cache-size"
+#define QCOW2_OPT_L2_CACHE_ENTRY_SIZE "l2-cache-entry-size"
#define QCOW2_OPT_REFCOUNT_CACHE_SIZE "refcount-cache-size"
#define QCOW2_OPT_CACHE_CLEAN_INTERVAL "cache-clean-interval"
struct Qcow2Cache;
typedef struct Qcow2Cache Qcow2Cache;
+typedef struct Qcow2CryptoHeaderExtension {
+ uint64_t offset;
+ uint64_t length;
+} QEMU_PACKED Qcow2CryptoHeaderExtension;
+
typedef struct Qcow2UnknownHeaderExtension {
uint32_t magic;
uint32_t len;
QCOW2_COMPAT_FEAT_MASK = QCOW2_COMPAT_LAZY_REFCOUNTS,
};
+/* Autoclear feature bits */
+enum {
+ QCOW2_AUTOCLEAR_BITMAPS_BITNR = 0,
+ QCOW2_AUTOCLEAR_BITMAPS = 1 << QCOW2_AUTOCLEAR_BITMAPS_BITNR,
+
+ QCOW2_AUTOCLEAR_MASK = QCOW2_AUTOCLEAR_BITMAPS,
+};
+
enum qcow2_discard_type {
QCOW2_DISCARD_NEVER = 0,
QCOW2_DISCARD_ALWAYS,
typedef void Qcow2SetRefcountFunc(void *refcount_array,
uint64_t index, uint64_t value);
+typedef struct Qcow2BitmapHeaderExt {
+ uint32_t nb_bitmaps;
+ uint32_t reserved32;
+ uint64_t bitmap_directory_size;
+ uint64_t bitmap_directory_offset;
+} QEMU_PACKED Qcow2BitmapHeaderExt;
+
typedef struct BDRVQcow2State {
int cluster_bits;
int cluster_size;
int cluster_sectors;
+ int l2_slice_size;
int l2_bits;
int l2_size;
int l1_size;
CoMutex lock;
- QCryptoCipher *cipher; /* current cipher, NULL if no key yet */
+ Qcow2CryptoHeaderExtension crypto_header; /* QCow2 header extension */
+ QCryptoBlockOpenOptions *crypto_opts; /* Disk encryption runtime options */
+ QCryptoBlock *crypto; /* Disk encryption format driver */
+ bool crypt_physical_offset; /* Whether to use virtual or physical offset
+ for encryption initialization vector tweak */
uint32_t crypt_method_header;
uint64_t snapshots_offset;
int snapshots_size;
unsigned int nb_snapshots;
QCowSnapshot *snapshots;
+ uint32_t nb_bitmaps;
+ uint64_t bitmap_directory_size;
+ uint64_t bitmap_directory_offset;
+
int flags;
int qcow_version;
bool use_lazy_refcounts;
* Offset of the COW region in bytes from the start of the first cluster
* touched by the request.
*/
- uint64_t offset;
+ unsigned offset;
/** Number of bytes to copy */
- int nb_bytes;
+ unsigned nb_bytes;
} Qcow2COWRegion;
/**
*/
Qcow2COWRegion cow_end;
+ /**
+ * The I/O vector with the data from the actual guest write request.
+ * If non-NULL, this is meant to be merged together with the data
+ * from @cow_start and @cow_end into one single write operation.
+ */
+ QEMUIOVector *data_qiov;
+
/** Pointer to next L2Meta of the same write request */
struct QCowL2Meta *next;
return (size + (1ULL << shift) - 1) >> shift;
}
+static inline int offset_to_l1_index(BDRVQcow2State *s, uint64_t offset)
+{
+ return offset >> (s->l2_bits + s->cluster_bits);
+}
+
static inline int offset_to_l2_index(BDRVQcow2State *s, int64_t offset)
{
return (offset >> s->cluster_bits) & (s->l2_size - 1);
}
-static inline int64_t align_offset(int64_t offset, int n)
+static inline int offset_to_l2_slice_index(BDRVQcow2State *s, int64_t offset)
{
- offset = (offset + n - 1) & ~(n - 1);
- return offset;
+ return (offset >> s->cluster_bits) & (s->l2_slice_size - 1);
}
static inline int64_t qcow2_vm_state_offset(BDRVQcow2State *s)
return r1 > r2 ? r1 - r2 : r2 - r1;
}
+static inline
+uint32_t offset_to_reftable_index(BDRVQcow2State *s, uint64_t offset)
+{
+ return offset >> (s->refcount_block_bits + s->cluster_bits);
+}
+
/* qcow2.c functions */
-int qcow2_backing_read1(BlockDriverState *bs, QEMUIOVector *qiov,
- int64_t sector_num, int nb_sectors);
+int64_t qcow2_refcount_metadata_size(int64_t clusters, size_t cluster_size,
+ int refcount_order, bool generous_increase,
+ uint64_t *refblock_count);
int qcow2_mark_dirty(BlockDriverState *bs);
int qcow2_mark_corrupt(BlockDriverState *bs);
uint64_t addend, bool decrease,
enum qcow2_discard_type type);
+int64_t qcow2_refcount_area(BlockDriverState *bs, uint64_t offset,
+ uint64_t additional_clusters, bool exact_size,
+ int new_refblock_index,
+ uint64_t new_refblock_offset);
+
int64_t qcow2_alloc_clusters(BlockDriverState *bs, uint64_t size);
int64_t qcow2_alloc_clusters_at(BlockDriverState *bs, uint64_t offset,
int64_t nb_clusters);
int qcow2_update_snapshot_refcount(BlockDriverState *bs,
int64_t l1_table_offset, int l1_size, int addend);
+int coroutine_fn qcow2_flush_caches(BlockDriverState *bs);
+int coroutine_fn qcow2_write_caches(BlockDriverState *bs);
int qcow2_check_refcounts(BlockDriverState *bs, BdrvCheckResult *res,
BdrvCheckMode fix);
int64_t size);
int qcow2_pre_write_overlap_check(BlockDriverState *bs, int ign, int64_t offset,
int64_t size);
+int qcow2_inc_refcounts_imrt(BlockDriverState *bs, BdrvCheckResult *res,
+ void **refcount_table,
+ int64_t *refcount_table_size,
+ int64_t offset, int64_t size);
int qcow2_change_refcount_order(BlockDriverState *bs, int refcount_order,
BlockDriverAmendStatusCB *status_cb,
void *cb_opaque, Error **errp);
+int qcow2_shrink_reftable(BlockDriverState *bs);
+int64_t qcow2_get_last_cluster(BlockDriverState *bs, int64_t size);
/* qcow2-cluster.c functions */
int qcow2_grow_l1_table(BlockDriverState *bs, uint64_t min_size,
bool exact_size);
+int qcow2_shrink_l1_table(BlockDriverState *bs, uint64_t max_size);
int qcow2_write_l1_entry(BlockDriverState *bs, int l1_index);
int qcow2_decompress_cluster(BlockDriverState *bs, uint64_t cluster_offset);
int qcow2_encrypt_sectors(BDRVQcow2State *s, int64_t sector_num,
- uint8_t *out_buf, const uint8_t *in_buf,
- int nb_sectors, bool enc, Error **errp);
+ uint8_t *buf, int nb_sectors, bool enc, Error **errp);
int qcow2_get_cluster_offset(BlockDriverState *bs, uint64_t offset,
unsigned int *bytes, uint64_t *cluster_offset);
int qcow2_read_snapshots(BlockDriverState *bs);
/* qcow2-cache.c functions */
-Qcow2Cache *qcow2_cache_create(BlockDriverState *bs, int num_tables);
-int qcow2_cache_destroy(BlockDriverState* bs, Qcow2Cache *c);
+Qcow2Cache *qcow2_cache_create(BlockDriverState *bs, int num_tables,
+ unsigned table_size);
+int qcow2_cache_destroy(Qcow2Cache *c);
-void qcow2_cache_entry_mark_dirty(BlockDriverState *bs, Qcow2Cache *c,
- void *table);
+void qcow2_cache_entry_mark_dirty(Qcow2Cache *c, void *table);
int qcow2_cache_flush(BlockDriverState *bs, Qcow2Cache *c);
int qcow2_cache_write(BlockDriverState *bs, Qcow2Cache *c);
int qcow2_cache_set_dependency(BlockDriverState *bs, Qcow2Cache *c,
Qcow2Cache *dependency);
void qcow2_cache_depends_on_flush(Qcow2Cache *c);
-void qcow2_cache_clean_unused(BlockDriverState *bs, Qcow2Cache *c);
+void qcow2_cache_clean_unused(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,
void **table);
-void qcow2_cache_put(BlockDriverState *bs, Qcow2Cache *c, void **table);
+void qcow2_cache_put(Qcow2Cache *c, void **table);
+void *qcow2_cache_is_table_offset(Qcow2Cache *c, uint64_t offset);
+void qcow2_cache_discard(Qcow2Cache *c, void *table);
+
+/* qcow2-bitmap.c functions */
+int qcow2_check_bitmaps_refcounts(BlockDriverState *bs, BdrvCheckResult *res,
+ void **refcount_table,
+ int64_t *refcount_table_size);
+bool qcow2_load_dirty_bitmaps(BlockDriverState *bs, Error **errp);
+int qcow2_reopen_bitmaps_rw(BlockDriverState *bs, Error **errp);
+void qcow2_store_persistent_dirty_bitmaps(BlockDriverState *bs, Error **errp);
+int qcow2_reopen_bitmaps_ro(BlockDriverState *bs, Error **errp);
+bool qcow2_can_store_new_dirty_bitmap(BlockDriverState *bs,
+ const char *name,
+ uint32_t granularity,
+ Error **errp);
+void qcow2_remove_persistent_dirty_bitmap(BlockDriverState *bs,
+ const char *name,
+ Error **errp);
#endif
projects / qemu.git / blobdiff