From bb756eebdac6fd24e8919e2c43f7d2c8c4091f59 Mon Sep 17 00:00:00 2001 From: RajithaY Date: Tue, 25 Apr 2017 03:31:15 -0700 Subject: Adding qemu as a submodule of KVMFORNFV This Patch includes the changes to add qemu as a submodule to kvmfornfv repo and make use of the updated latest qemu for the execution of all testcase Change-Id: I1280af507a857675c7f81d30c95255635667bdd7 Signed-off-by:RajithaY --- qemu/block/qcow2.h | 599 ----------------------------------------------------- 1 file changed, 599 deletions(-) delete mode 100644 qemu/block/qcow2.h (limited to 'qemu/block/qcow2.h') diff --git a/qemu/block/qcow2.h b/qemu/block/qcow2.h deleted file mode 100644 index a063a3c1a..000000000 --- a/qemu/block/qcow2.h +++ /dev/null @@ -1,599 +0,0 @@ -/* - * Block driver for the QCOW version 2 format - * - * Copyright (c) 2004-2006 Fabrice Bellard - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN - * THE SOFTWARE. - */ - -#ifndef BLOCK_QCOW2_H -#define BLOCK_QCOW2_H - -#include "crypto/cipher.h" -#include "qemu/coroutine.h" - -//#define DEBUG_ALLOC -//#define DEBUG_ALLOC2 -//#define DEBUG_EXT - -#define QCOW_MAGIC (('Q' << 24) | ('F' << 16) | ('I' << 8) | 0xfb) - -#define QCOW_CRYPT_NONE 0 -#define QCOW_CRYPT_AES 1 - -#define QCOW_MAX_CRYPT_CLUSTERS 32 -#define QCOW_MAX_SNAPSHOTS 65536 - -/* 8 MB refcount table is enough for 2 PB images at 64k cluster size - * (128 GB for 512 byte clusters, 2 EB for 2 MB clusters) */ -#define QCOW_MAX_REFTABLE_SIZE 0x800000 - -/* 32 MB L1 table is enough for 2 PB images at 64k cluster size - * (128 GB for 512 byte clusters, 2 EB for 2 MB clusters) */ -#define QCOW_MAX_L1_SIZE 0x2000000 - -/* Allow for an average of 1k per snapshot table entry, should be plenty of - * space for snapshot names and IDs */ -#define QCOW_MAX_SNAPSHOTS_SIZE (1024 * QCOW_MAX_SNAPSHOTS) - -/* 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 QCOW_OFLAG_COMPRESSED (1ULL << 62) -/* The cluster reads as all zeros */ -#define QCOW_OFLAG_ZERO (1ULL << 0) - -#define MIN_CLUSTER_BITS 9 -#define MAX_CLUSTER_BITS 21 - -/* Must be at least 2 to cover COW */ -#define MIN_L2_CACHE_SIZE 2 /* clusters */ - -/* Must be at least 4 to cover all cases of refcount table growth */ -#define MIN_REFCOUNT_CACHE_SIZE 4 /* clusters */ - -/* Whichever is more */ -#define DEFAULT_L2_CACHE_CLUSTERS 8 /* clusters */ -#define DEFAULT_L2_CACHE_BYTE_SIZE 1048576 /* bytes */ - -/* The refblock cache needs only a fourth of the L2 cache size to cover as many - * clusters */ -#define DEFAULT_L2_REFCOUNT_SIZE_RATIO 4 - -#define DEFAULT_CLUSTER_SIZE 65536 - - -#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_TEMPLATE "overlap-check.template" -#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" -#define QCOW2_OPT_CACHE_SIZE "cache-size" -#define QCOW2_OPT_L2_CACHE_SIZE "l2-cache-size" -#define QCOW2_OPT_REFCOUNT_CACHE_SIZE "refcount-cache-size" -#define QCOW2_OPT_CACHE_CLEAN_INTERVAL "cache-clean-interval" - -typedef struct QCowHeader { - uint32_t magic; - uint32_t version; - uint64_t backing_file_offset; - uint32_t backing_file_size; - uint32_t cluster_bits; - uint64_t size; /* in bytes */ - uint32_t crypt_method; - uint32_t l1_size; /* XXX: save number of clusters instead ? */ - uint64_t l1_table_offset; - uint64_t refcount_table_offset; - uint32_t refcount_table_clusters; - uint32_t nb_snapshots; - uint64_t snapshots_offset; - - /* The following fields are only valid for version >= 3 */ - uint64_t incompatible_features; - uint64_t compatible_features; - uint64_t autoclear_features; - - uint32_t refcount_order; - uint32_t header_length; -} QEMU_PACKED QCowHeader; - -typedef struct QEMU_PACKED QCowSnapshotHeader { - /* header is 8 byte aligned */ - uint64_t l1_table_offset; - - uint32_t l1_size; - uint16_t id_str_size; - uint16_t name_size; - - uint32_t date_sec; - uint32_t date_nsec; - - uint64_t vm_clock_nsec; - - uint32_t vm_state_size; - uint32_t extra_data_size; /* for extension */ - /* extra data follows */ - /* id_str follows */ - /* name follows */ -} QCowSnapshotHeader; - -typedef struct QEMU_PACKED QCowSnapshotExtraData { - uint64_t vm_state_size_large; - uint64_t disk_size; -} QCowSnapshotExtraData; - - -typedef struct QCowSnapshot { - uint64_t l1_table_offset; - uint32_t l1_size; - char *id_str; - char *name; - uint64_t disk_size; - uint64_t vm_state_size; - uint32_t date_sec; - uint32_t date_nsec; - uint64_t vm_clock_nsec; -} QCowSnapshot; - -struct Qcow2Cache; -typedef struct Qcow2Cache Qcow2Cache; - -typedef struct Qcow2UnknownHeaderExtension { - uint32_t magic; - uint32_t len; - QLIST_ENTRY(Qcow2UnknownHeaderExtension) next; - uint8_t data[]; -} Qcow2UnknownHeaderExtension; - -enum { - QCOW2_FEAT_TYPE_INCOMPATIBLE = 0, - QCOW2_FEAT_TYPE_COMPATIBLE = 1, - QCOW2_FEAT_TYPE_AUTOCLEAR = 2, -}; - -/* 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_CORRUPT, -}; - -/* Compatible feature bits */ -enum { - QCOW2_COMPAT_LAZY_REFCOUNTS_BITNR = 0, - QCOW2_COMPAT_LAZY_REFCOUNTS = 1 << QCOW2_COMPAT_LAZY_REFCOUNTS_BITNR, - - 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 uint64_t Qcow2GetRefcountFunc(const void *refcount_array, - uint64_t index); -typedef void Qcow2SetRefcountFunc(void *refcount_array, - uint64_t index, uint64_t value); - -typedef struct BDRVQcow2State { - int cluster_bits; - int cluster_size; - int cluster_sectors; - int l2_bits; - int l2_size; - int l1_size; - int l1_vm_state_index; - int refcount_block_bits; - int refcount_block_size; - int csize_shift; - int csize_mask; - uint64_t cluster_offset_mask; - uint64_t l1_table_offset; - uint64_t *l1_table; - - Qcow2Cache* l2_table_cache; - Qcow2Cache* refcount_block_cache; - QEMUTimer *cache_clean_timer; - unsigned cache_clean_interval; - - uint8_t *cluster_cache; - uint8_t *cluster_data; - uint64_t cluster_cache_offset; - QLIST_HEAD(QCowClusterAlloc, QCowL2Meta) cluster_allocs; - - uint64_t *refcount_table; - uint64_t refcount_table_offset; - uint32_t refcount_table_size; - uint64_t free_cluster_index; - uint64_t free_byte_offset; - - CoMutex lock; - - QCryptoCipher *cipher; /* current cipher, NULL if no key yet */ - uint32_t crypt_method_header; - uint64_t snapshots_offset; - int snapshots_size; - unsigned int nb_snapshots; - QCowSnapshot *snapshots; - - int flags; - int qcow_version; - bool use_lazy_refcounts; - int refcount_order; - int refcount_bits; - uint64_t refcount_max; - - Qcow2GetRefcountFunc *get_refcount; - Qcow2SetRefcountFunc *set_refcount; - - bool discard_passthrough[QCOW2_DISCARD_MAX]; - - int overlap_check; /* bitmask of Qcow2MetadataOverlap values */ - bool signaled_corruption; - - uint64_t incompatible_features; - uint64_t compatible_features; - uint64_t autoclear_features; - - size_t unknown_header_fields_size; - void* unknown_header_fields; - QLIST_HEAD(, Qcow2UnknownHeaderExtension) unknown_header_ext; - QTAILQ_HEAD (, Qcow2DiscardRegion) discards; - bool cache_discards; - - /* Backing file path and format as stored in the image (this is not the - * effective path/format, which may be the result of a runtime option - * override) */ - char *image_backing_file; - char *image_backing_format; -} BDRVQcow2State; - -typedef struct Qcow2COWRegion { - /** - * Offset of the COW region in bytes from the start of the first cluster - * touched by the request. - */ - uint64_t offset; - - /** Number of sectors to copy */ - int nb_sectors; -} Qcow2COWRegion; - -/** - * Describes an in-flight (part of a) write request that writes to clusters - * that are not referenced in their L2 table yet. - */ -typedef struct QCowL2Meta -{ - /** Guest offset of the first newly allocated cluster */ - uint64_t offset; - - /** Host offset of the first newly allocated cluster */ - uint64_t alloc_offset; - - /** - * Number of sectors from the start of the first allocated cluster to - * the end of the (possibly shortened) request - */ - int nb_available; - - /** Number of newly allocated clusters */ - int nb_clusters; - - /** - * Requests that overlap with this allocation and wait to be restarted - * when the allocating request has completed. - */ - CoQueue dependent_requests; - - /** - * The COW Region between the start of the first allocated cluster and the - * area the guest actually writes to. - */ - Qcow2COWRegion cow_start; - - /** - * The COW Region between the area the guest actually writes to and the - * end of the last allocated cluster. - */ - Qcow2COWRegion cow_end; - - /** Pointer to next L2Meta of the same write request */ - struct QCowL2Meta *next; - - QLIST_ENTRY(QCowL2Meta) next_in_flight; -} QCowL2Meta; - -enum { - QCOW2_CLUSTER_UNALLOCATED, - QCOW2_CLUSTER_NORMAL, - QCOW2_CLUSTER_COMPRESSED, - 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 0x00fffffffffffe00ULL -#define L2E_OFFSET_MASK 0x00fffffffffffe00ULL -#define L2E_COMPRESSED_OFFSET_SIZE_MASK 0x3fffffffffffffffULL - -#define REFT_OFFSET_MASK 0xfffffffffffffe00ULL - -static inline int64_t start_of_cluster(BDRVQcow2State *s, int64_t offset) -{ - return offset & ~(s->cluster_size - 1); -} - -static inline int64_t offset_into_cluster(BDRVQcow2State *s, int64_t offset) -{ - return offset & (s->cluster_size - 1); -} - -static inline uint64_t size_to_clusters(BDRVQcow2State *s, uint64_t size) -{ - return (size + (s->cluster_size - 1)) >> s->cluster_bits; -} - -static inline int64_t size_to_l1(BDRVQcow2State *s, int64_t size) -{ - int shift = s->cluster_bits + s->l2_bits; - return (size + (1ULL << shift) - 1) >> shift; -} - -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) -{ - offset = (offset + n - 1) & ~(n - 1); - return offset; -} - -static inline int64_t qcow2_vm_state_offset(BDRVQcow2State *s) -{ - return (int64_t)s->l1_vm_state_index << (s->cluster_bits + s->l2_bits); -} - -static inline uint64_t qcow2_max_refcount_clusters(BDRVQcow2State *s) -{ - return QCOW_MAX_REFTABLE_SIZE >> s->cluster_bits; -} - -static inline int qcow2_get_cluster_type(uint64_t l2_entry) -{ - if (l2_entry & QCOW_OFLAG_COMPRESSED) { - return QCOW2_CLUSTER_COMPRESSED; - } else if (l2_entry & QCOW_OFLAG_ZERO) { - return QCOW2_CLUSTER_ZERO; - } else if (!(l2_entry & L2E_OFFSET_MASK)) { - return QCOW2_CLUSTER_UNALLOCATED; - } else { - return QCOW2_CLUSTER_NORMAL; - } -} - -/* Check whether refcounts are eager or lazy */ -static inline bool qcow2_need_accurate_refcounts(BDRVQcow2State *s) -{ - return !(s->incompatible_features & QCOW2_INCOMPAT_DIRTY); -} - -static inline uint64_t l2meta_cow_start(QCowL2Meta *m) -{ - return m->offset + m->cow_start.offset; -} - -static inline uint64_t l2meta_cow_end(QCowL2Meta *m) -{ - return m->offset + m->cow_end.offset - + (m->cow_end.nb_sectors << BDRV_SECTOR_BITS); -} - -static inline uint64_t refcount_diff(uint64_t r1, uint64_t r2) -{ - return r1 > r2 ? r1 - r2 : r2 - r1; -} - -// FIXME Need qcow2_ prefix to global functions - -/* qcow2.c functions */ -int qcow2_backing_read1(BlockDriverState *bs, QEMUIOVector *qiov, - 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); - -void qcow2_signal_corruption(BlockDriverState *bs, bool fatal, int64_t offset, - int64_t size, const char *message_format, ...) - GCC_FMT_ATTR(5, 6); - -/* qcow2-refcount.c functions */ -int qcow2_refcount_init(BlockDriverState *bs); -void qcow2_refcount_close(BlockDriverState *bs); - -int qcow2_get_refcount(BlockDriverState *bs, int64_t cluster_index, - uint64_t *refcount); - -int qcow2_update_cluster_refcount(BlockDriverState *bs, int64_t cluster_index, - uint64_t addend, bool decrease, - enum qcow2_discard_type type); - -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); -int64_t qcow2_alloc_bytes(BlockDriverState *bs, int size); -void qcow2_free_clusters(BlockDriverState *bs, - 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); - -int qcow2_change_refcount_order(BlockDriverState *bs, int refcount_order, - BlockDriverAmendStatusCB *status_cb, - void *cb_opaque, Error **errp); - -/* qcow2-cluster.c functions */ -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); -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); - -int qcow2_get_cluster_offset(BlockDriverState *bs, uint64_t offset, - int *num, uint64_t *cluster_offset); -int qcow2_alloc_cluster_offset(BlockDriverState *bs, uint64_t offset, - int *num, uint64_t *host_offset, QCowL2Meta **m); -uint64_t qcow2_alloc_compressed_cluster_offset(BlockDriverState *bs, - uint64_t offset, - int compressed_size); - -int qcow2_alloc_cluster_link_l2(BlockDriverState *bs, QCowL2Meta *m); -int qcow2_discard_clusters(BlockDriverState *bs, uint64_t offset, - int nb_sectors, enum qcow2_discard_type type, bool full_discard); -int qcow2_zero_clusters(BlockDriverState *bs, uint64_t offset, int nb_sectors); - -int qcow2_expand_zero_clusters(BlockDriverState *bs, - BlockDriverAmendStatusCB *status_cb, - void *cb_opaque); - -/* 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, - const char *name, - Error **errp); -int qcow2_snapshot_list(BlockDriverState *bs, QEMUSnapshotInfo **psn_tab); -int qcow2_snapshot_load_tmp(BlockDriverState *bs, - const char *snapshot_id, - const char *name, - Error **errp); - -void qcow2_free_snapshots(BlockDriverState *bs); -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); - -void qcow2_cache_entry_mark_dirty(BlockDriverState *bs, Qcow2Cache *c, - void *table); -int qcow2_cache_flush(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); -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); - -#endif -- cgit 1.2.3-korg