Archipelago » qemu

#include "aes.h"

#ifndef QEMU_AES_H

#define QEMU_AES_H

#define AES_MAXNR 14

#define AES_BLOCK_SIZE 16

struct aes_key_st {

    uint32_t rd_key[4 *(AES_MAXNR + 1)];

    int rounds;

};

typedef struct aes_key_st AES_KEY;

int AES_set_encrypt_key(const unsigned char *userKey, const int bits,

	AES_KEY *key);

int AES_set_decrypt_key(const unsigned char *userKey, const int bits,

	AES_KEY *key);

void AES_encrypt(const unsigned char *in, unsigned char *out,

	const AES_KEY *key);

void AES_decrypt(const unsigned char *in, unsigned char *out,

	const AES_KEY *key);

void AES_cbc_encrypt(const unsigned char *in, unsigned char *out,

		     const unsigned long length, const AES_KEY *key,

		     unsigned char *ivec, const int enc);

#endif

#include "block.h"

#include "block.h"

#include "qemu-aio.h"

#include "block_int.h"

#include "block_int.h"

#include "blockjob.h"

#include "qemu-coroutine.h"

#ifndef BLOCK_H

#define BLOCK_H

#include "qemu-aio.h"

#include "qemu-common.h"

#include "qemu-option.h"

#include "qemu-coroutine.h"

#include "qapi/qmp/qobject.h"

#include "qapi-types.h"

/* block.c */

typedef struct BlockDriver BlockDriver;

typedef struct BlockJob BlockJob;

typedef struct BlockDriverInfo {

    /* in bytes, 0 if irrelevant */

    int cluster_size;

    /* offset at which the VM state can be saved (0 if not possible) */

    int64_t vm_state_offset;

    bool is_dirty;

} BlockDriverInfo;

typedef struct BlockFragInfo {

    uint64_t allocated_clusters;

    uint64_t total_clusters;

    uint64_t fragmented_clusters;

} BlockFragInfo;

typedef struct QEMUSnapshotInfo {

    char id_str[128]; /* unique snapshot id */

    /* the following fields are informative. They are not needed for

       the consistency of the snapshot */

    char name[256]; /* user chosen name */

    uint64_t vm_state_size; /* VM state info size */

    uint32_t date_sec; /* UTC date of the snapshot */

    uint32_t date_nsec;

    uint64_t vm_clock_nsec; /* VM clock relative to boot */

} QEMUSnapshotInfo;

/* Callbacks for block device models */

typedef struct BlockDevOps {

    /*

     * Runs when virtual media changed (monitor commands eject, change)

     * Argument load is true on load and false on eject.

     * Beware: doesn't run when a host device's physical media

     * changes.  Sure would be useful if it did.

     * Device models with removable media must implement this callback.

     */

    void (*change_media_cb)(void *opaque, bool load);

    /*

     * Runs when an eject request is issued from the monitor, the tray

     * is closed, and the medium is locked.

     * Device models that do not implement is_medium_locked will not need

     * this callback.  Device models that can lock the medium or tray might

     * want to implement the callback and unlock the tray when "force" is

     * true, even if they do not support eject requests.

     */

    void (*eject_request_cb)(void *opaque, bool force);

    /*

     * Is the virtual tray open?

     * Device models implement this only when the device has a tray.

     */

    bool (*is_tray_open)(void *opaque);

    /*

     * Is the virtual medium locked into the device?

     * Device models implement this only when device has such a lock.

     */

    bool (*is_medium_locked)(void *opaque);

    /*

     * Runs when the size changed (e.g. monitor command block_resize)

     */

    void (*resize_cb)(void *opaque);

} BlockDevOps;

#define BDRV_O_RDWR        0x0002

#define BDRV_O_SNAPSHOT    0x0008 /* open the file read only and save writes in a snapshot */

#define BDRV_O_NOCACHE     0x0020 /* do not use the host page cache */

#define BDRV_O_CACHE_WB    0x0040 /* use write-back caching */

#define BDRV_O_NATIVE_AIO  0x0080 /* use native AIO instead of the thread pool */

#define BDRV_O_NO_BACKING  0x0100 /* don't open the backing file */

#define BDRV_O_NO_FLUSH    0x0200 /* disable flushing on this disk */

#define BDRV_O_COPY_ON_READ 0x0400 /* copy read backing sectors into image */

#define BDRV_O_INCOMING    0x0800  /* consistency hint for incoming migration */

#define BDRV_O_CHECK       0x1000  /* open solely for consistency check */

#define BDRV_O_ALLOW_RDWR  0x2000  /* allow reopen to change from r/o to r/w */

#define BDRV_O_CACHE_MASK  (BDRV_O_NOCACHE | BDRV_O_CACHE_WB | BDRV_O_NO_FLUSH)

#define BDRV_SECTOR_BITS   9

#define BDRV_SECTOR_SIZE   (1ULL << BDRV_SECTOR_BITS)

#define BDRV_SECTOR_MASK   ~(BDRV_SECTOR_SIZE - 1)

typedef enum {

    BDRV_ACTION_REPORT, BDRV_ACTION_IGNORE, BDRV_ACTION_STOP

} BlockErrorAction;

typedef QSIMPLEQ_HEAD(BlockReopenQueue, BlockReopenQueueEntry) BlockReopenQueue;

typedef struct BDRVReopenState {

    BlockDriverState *bs;

    int flags;

    void *opaque;

} BDRVReopenState;

void bdrv_iostatus_enable(BlockDriverState *bs);

void bdrv_iostatus_reset(BlockDriverState *bs);

void bdrv_iostatus_disable(BlockDriverState *bs);

bool bdrv_iostatus_is_enabled(const BlockDriverState *bs);

void bdrv_iostatus_set_err(BlockDriverState *bs, int error);

void bdrv_info_print(Monitor *mon, const QObject *data);

void bdrv_info(Monitor *mon, QObject **ret_data);

void bdrv_stats_print(Monitor *mon, const QObject *data);

void bdrv_info_stats(Monitor *mon, QObject **ret_data);

/* disk I/O throttling */

void bdrv_io_limits_enable(BlockDriverState *bs);

void bdrv_io_limits_disable(BlockDriverState *bs);

bool bdrv_io_limits_enabled(BlockDriverState *bs);

void bdrv_init(void);

void bdrv_init_with_whitelist(void);

BlockDriver *bdrv_find_protocol(const char *filename);

BlockDriver *bdrv_find_format(const char *format_name);

BlockDriver *bdrv_find_whitelisted_format(const char *format_name);

int bdrv_create(BlockDriver *drv, const char* filename,

    QEMUOptionParameter *options);

int bdrv_create_file(const char* filename, QEMUOptionParameter *options);

BlockDriverState *bdrv_new(const char *device_name);

void bdrv_make_anon(BlockDriverState *bs);

void bdrv_swap(BlockDriverState *bs_new, BlockDriverState *bs_old);

void bdrv_append(BlockDriverState *bs_new, BlockDriverState *bs_top);

void bdrv_delete(BlockDriverState *bs);

int bdrv_parse_cache_flags(const char *mode, int *flags);

int bdrv_file_open(BlockDriverState **pbs, const char *filename, int flags);

int bdrv_open_backing_file(BlockDriverState *bs);

int bdrv_open(BlockDriverState *bs, const char *filename, int flags,

              BlockDriver *drv);

BlockReopenQueue *bdrv_reopen_queue(BlockReopenQueue *bs_queue,

                                    BlockDriverState *bs, int flags);

int bdrv_reopen_multiple(BlockReopenQueue *bs_queue, Error **errp);

int bdrv_reopen(BlockDriverState *bs, int bdrv_flags, Error **errp);

int bdrv_reopen_prepare(BDRVReopenState *reopen_state,

                        BlockReopenQueue *queue, Error **errp);

void bdrv_reopen_commit(BDRVReopenState *reopen_state);

void bdrv_reopen_abort(BDRVReopenState *reopen_state);

void bdrv_close(BlockDriverState *bs);

void bdrv_add_close_notifier(BlockDriverState *bs, Notifier *notify);

int bdrv_attach_dev(BlockDriverState *bs, void *dev);

void bdrv_attach_dev_nofail(BlockDriverState *bs, void *dev);

void bdrv_detach_dev(BlockDriverState *bs, void *dev);

void *bdrv_get_attached_dev(BlockDriverState *bs);

void bdrv_set_dev_ops(BlockDriverState *bs, const BlockDevOps *ops,

                      void *opaque);

void bdrv_dev_eject_request(BlockDriverState *bs, bool force);

bool bdrv_dev_has_removable_media(BlockDriverState *bs);

bool bdrv_dev_is_tray_open(BlockDriverState *bs);

bool bdrv_dev_is_medium_locked(BlockDriverState *bs);

int bdrv_read(BlockDriverState *bs, int64_t sector_num,

              uint8_t *buf, int nb_sectors);

int bdrv_read_unthrottled(BlockDriverState *bs, int64_t sector_num,

                          uint8_t *buf, int nb_sectors);

int bdrv_write(BlockDriverState *bs, int64_t sector_num,

               const uint8_t *buf, int nb_sectors);

int bdrv_pread(BlockDriverState *bs, int64_t offset,

               void *buf, int count);

int bdrv_pwrite(BlockDriverState *bs, int64_t offset,

                const void *buf, int count);

int bdrv_pwrite_sync(BlockDriverState *bs, int64_t offset,

    const void *buf, int count);

int coroutine_fn bdrv_co_readv(BlockDriverState *bs, int64_t sector_num,

    int nb_sectors, QEMUIOVector *qiov);

int coroutine_fn bdrv_co_copy_on_readv(BlockDriverState *bs,

    int64_t sector_num, int nb_sectors, QEMUIOVector *qiov);

int coroutine_fn bdrv_co_writev(BlockDriverState *bs, int64_t sector_num,

    int nb_sectors, QEMUIOVector *qiov);

/*

 * Efficiently zero a region of the disk image.  Note that this is a regular

 * I/O request like read or write and should have a reasonable size.  This

 * function is not suitable for zeroing the entire image in a single request

 * because it may allocate memory for the entire region.

 */

int coroutine_fn bdrv_co_write_zeroes(BlockDriverState *bs, int64_t sector_num,

    int nb_sectors);

int coroutine_fn bdrv_co_is_allocated(BlockDriverState *bs, int64_t sector_num,

    int nb_sectors, int *pnum);

int coroutine_fn bdrv_co_is_allocated_above(BlockDriverState *top,

                                            BlockDriverState *base,

                                            int64_t sector_num,

                                            int nb_sectors, int *pnum);

BlockDriverState *bdrv_find_backing_image(BlockDriverState *bs,

    const char *backing_file);

int bdrv_get_backing_file_depth(BlockDriverState *bs);

int bdrv_truncate(BlockDriverState *bs, int64_t offset);

int64_t bdrv_getlength(BlockDriverState *bs);

int64_t bdrv_get_allocated_file_size(BlockDriverState *bs);

void bdrv_get_geometry(BlockDriverState *bs, uint64_t *nb_sectors_ptr);

int bdrv_commit(BlockDriverState *bs);

int bdrv_commit_all(void);

int bdrv_change_backing_file(BlockDriverState *bs,

    const char *backing_file, const char *backing_fmt);

void bdrv_register(BlockDriver *bdrv);

int bdrv_drop_intermediate(BlockDriverState *active, BlockDriverState *top,

                           BlockDriverState *base);

BlockDriverState *bdrv_find_overlay(BlockDriverState *active,

                                    BlockDriverState *bs);

BlockDriverState *bdrv_find_base(BlockDriverState *bs);

typedef struct BdrvCheckResult {

    int corruptions;

    int leaks;

    int check_errors;

    int corruptions_fixed;

    int leaks_fixed;

    BlockFragInfo bfi;

} BdrvCheckResult;

typedef enum {

    BDRV_FIX_LEAKS    = 1,

    BDRV_FIX_ERRORS   = 2,

} BdrvCheckMode;

int bdrv_check(BlockDriverState *bs, BdrvCheckResult *res, BdrvCheckMode fix);

/* async block I/O */

typedef void BlockDriverDirtyHandler(BlockDriverState *bs, int64_t sector,

                                     int sector_num);

BlockDriverAIOCB *bdrv_aio_readv(BlockDriverState *bs, int64_t sector_num,

                                 QEMUIOVector *iov, int nb_sectors,

                                 BlockDriverCompletionFunc *cb, void *opaque);

BlockDriverAIOCB *bdrv_aio_writev(BlockDriverState *bs, int64_t sector_num,

                                  QEMUIOVector *iov, int nb_sectors,

                                  BlockDriverCompletionFunc *cb, void *opaque);

BlockDriverAIOCB *bdrv_aio_flush(BlockDriverState *bs,

                                 BlockDriverCompletionFunc *cb, void *opaque);

BlockDriverAIOCB *bdrv_aio_discard(BlockDriverState *bs,

                                   int64_t sector_num, int nb_sectors,

                                   BlockDriverCompletionFunc *cb, void *opaque);

void bdrv_aio_cancel(BlockDriverAIOCB *acb);

typedef struct BlockRequest {

    /* Fields to be filled by multiwrite caller */

    int64_t sector;

    int nb_sectors;

    QEMUIOVector *qiov;

    BlockDriverCompletionFunc *cb;

    void *opaque;

    /* Filled by multiwrite implementation */

    int error;

} BlockRequest;

int bdrv_aio_multiwrite(BlockDriverState *bs, BlockRequest *reqs,

    int num_reqs);

/* sg packet commands */

int bdrv_ioctl(BlockDriverState *bs, unsigned long int req, void *buf);

BlockDriverAIOCB *bdrv_aio_ioctl(BlockDriverState *bs,

        unsigned long int req, void *buf,

        BlockDriverCompletionFunc *cb, void *opaque);

/* Invalidate any cached metadata used by image formats */

void bdrv_invalidate_cache(BlockDriverState *bs);

void bdrv_invalidate_cache_all(void);

void bdrv_clear_incoming_migration_all(void);

/* Ensure contents are flushed to disk.  */

int bdrv_flush(BlockDriverState *bs);

int coroutine_fn bdrv_co_flush(BlockDriverState *bs);

void bdrv_flush_all(void);

void bdrv_close_all(void);

void bdrv_drain_all(void);

int bdrv_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors);

int bdrv_co_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors);

int bdrv_has_zero_init(BlockDriverState *bs);

int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors,

                      int *pnum);

void bdrv_set_on_error(BlockDriverState *bs, BlockdevOnError on_read_error,

                       BlockdevOnError on_write_error);

BlockdevOnError bdrv_get_on_error(BlockDriverState *bs, bool is_read);

BlockErrorAction bdrv_get_error_action(BlockDriverState *bs, bool is_read, int error);

void bdrv_error_action(BlockDriverState *bs, BlockErrorAction action,

                       bool is_read, int error);

int bdrv_is_read_only(BlockDriverState *bs);

int bdrv_is_sg(BlockDriverState *bs);

int bdrv_enable_write_cache(BlockDriverState *bs);

void bdrv_set_enable_write_cache(BlockDriverState *bs, bool wce);

int bdrv_is_inserted(BlockDriverState *bs);

int bdrv_media_changed(BlockDriverState *bs);

void bdrv_lock_medium(BlockDriverState *bs, bool locked);

void bdrv_eject(BlockDriverState *bs, bool eject_flag);

const char *bdrv_get_format_name(BlockDriverState *bs);

BlockDriverState *bdrv_find(const char *name);

BlockDriverState *bdrv_next(BlockDriverState *bs);

void bdrv_iterate(void (*it)(void *opaque, BlockDriverState *bs),

                  void *opaque);

int bdrv_is_encrypted(BlockDriverState *bs);

int bdrv_key_required(BlockDriverState *bs);

int bdrv_set_key(BlockDriverState *bs, const char *key);

int bdrv_query_missing_keys(void);

void bdrv_iterate_format(void (*it)(void *opaque, const char *name),

                         void *opaque);

const char *bdrv_get_device_name(BlockDriverState *bs);

int bdrv_get_flags(BlockDriverState *bs);

int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num,

                          const uint8_t *buf, int nb_sectors);

int bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi);

const char *bdrv_get_encrypted_filename(BlockDriverState *bs);

void bdrv_get_backing_filename(BlockDriverState *bs,

                               char *filename, int filename_size);

void bdrv_get_full_backing_filename(BlockDriverState *bs,

                                    char *dest, size_t sz);

BlockInfo *bdrv_query_info(BlockDriverState *s);

BlockStats *bdrv_query_stats(const BlockDriverState *bs);

int bdrv_can_snapshot(BlockDriverState *bs);

int bdrv_is_snapshot(BlockDriverState *bs);

BlockDriverState *bdrv_snapshots(void);

int bdrv_snapshot_create(BlockDriverState *bs,

                         QEMUSnapshotInfo *sn_info);

int bdrv_snapshot_goto(BlockDriverState *bs,

                       const char *snapshot_id);

int bdrv_snapshot_delete(BlockDriverState *bs, const char *snapshot_id);

int bdrv_snapshot_list(BlockDriverState *bs,

                       QEMUSnapshotInfo **psn_info);

int bdrv_snapshot_load_tmp(BlockDriverState *bs,

                           const char *snapshot_name);

char *bdrv_snapshot_dump(char *buf, int buf_size, QEMUSnapshotInfo *sn);

char *get_human_readable_size(char *buf, int buf_size, int64_t size);

int path_is_absolute(const char *path);

void path_combine(char *dest, int dest_size,

                  const char *base_path,

                  const char *filename);

int bdrv_save_vmstate(BlockDriverState *bs, const uint8_t *buf,

                      int64_t pos, int size);

int bdrv_load_vmstate(BlockDriverState *bs, uint8_t *buf,

                      int64_t pos, int size);

void bdrv_img_create(const char *filename, const char *fmt,

                     const char *base_filename, const char *base_fmt,

                     char *options, uint64_t img_size, int flags, Error **errp);

void bdrv_set_buffer_alignment(BlockDriverState *bs, int align);

void *qemu_blockalign(BlockDriverState *bs, size_t size);

#define BDRV_SECTORS_PER_DIRTY_CHUNK 2048

void bdrv_set_dirty_tracking(BlockDriverState *bs, int enable);

int bdrv_get_dirty(BlockDriverState *bs, int64_t sector);

void bdrv_set_dirty(BlockDriverState *bs, int64_t cur_sector, int nr_sectors);

void bdrv_reset_dirty(BlockDriverState *bs, int64_t cur_sector, int nr_sectors);

int64_t bdrv_get_next_dirty(BlockDriverState *bs, int64_t sector);

int64_t bdrv_get_dirty_count(BlockDriverState *bs);

void bdrv_enable_copy_on_read(BlockDriverState *bs);

void bdrv_disable_copy_on_read(BlockDriverState *bs);

void bdrv_set_in_use(BlockDriverState *bs, int in_use);

int bdrv_in_use(BlockDriverState *bs);

enum BlockAcctType {

    BDRV_ACCT_READ,

    BDRV_ACCT_WRITE,

    BDRV_ACCT_FLUSH,

    BDRV_MAX_IOTYPE,

};

typedef struct BlockAcctCookie {

    int64_t bytes;

    int64_t start_time_ns;

    enum BlockAcctType type;

} BlockAcctCookie;

void bdrv_acct_start(BlockDriverState *bs, BlockAcctCookie *cookie,

        int64_t bytes, enum BlockAcctType type);

void bdrv_acct_done(BlockDriverState *bs, BlockAcctCookie *cookie);

typedef enum {

    BLKDBG_L1_UPDATE,

    BLKDBG_L1_GROW_ALLOC_TABLE,

    BLKDBG_L1_GROW_WRITE_TABLE,

    BLKDBG_L1_GROW_ACTIVATE_TABLE,

    BLKDBG_L2_LOAD,

    BLKDBG_L2_UPDATE,

    BLKDBG_L2_UPDATE_COMPRESSED,

    BLKDBG_L2_ALLOC_COW_READ,

    BLKDBG_L2_ALLOC_WRITE,

    BLKDBG_READ_AIO,

    BLKDBG_READ_BACKING_AIO,

    BLKDBG_READ_COMPRESSED,

    BLKDBG_WRITE_AIO,

    BLKDBG_WRITE_COMPRESSED,

    BLKDBG_VMSTATE_LOAD,

    BLKDBG_VMSTATE_SAVE,

    BLKDBG_COW_READ,

    BLKDBG_COW_WRITE,

    BLKDBG_REFTABLE_LOAD,

    BLKDBG_REFTABLE_GROW,

    BLKDBG_REFBLOCK_LOAD,

    BLKDBG_REFBLOCK_UPDATE,

    BLKDBG_REFBLOCK_UPDATE_PART,

    BLKDBG_REFBLOCK_ALLOC,

    BLKDBG_REFBLOCK_ALLOC_HOOKUP,

    BLKDBG_REFBLOCK_ALLOC_WRITE,

    BLKDBG_REFBLOCK_ALLOC_WRITE_BLOCKS,

    BLKDBG_REFBLOCK_ALLOC_WRITE_TABLE,

    BLKDBG_REFBLOCK_ALLOC_SWITCH_TABLE,

    BLKDBG_CLUSTER_ALLOC,

    BLKDBG_CLUSTER_ALLOC_BYTES,

    BLKDBG_CLUSTER_FREE,

    BLKDBG_EVENT_MAX,

} BlkDebugEvent;

#define BLKDBG_EVENT(bs, evt) bdrv_debug_event(bs, evt)

void bdrv_debug_event(BlockDriverState *bs, BlkDebugEvent event);

int bdrv_debug_breakpoint(BlockDriverState *bs, const char *event,

                           const char *tag);

int bdrv_debug_resume(BlockDriverState *bs, const char *tag);

bool bdrv_debug_is_suspended(BlockDriverState *bs, const char *tag);

#endif

#include "block_int.h"

#include "block_int.h"

#include "block_int.h"

#include "block_int.h"

#include "block_int.h"

#include "blockjob.h"

#include "block_int.h"

#include "block_int.h"

#include "block_int.h"

#include "block_int.h"

#include "block_int.h"

#include "qemu-aio.h"

#include "blockjob.h"

#include "block_int.h"

#include "nbd.h"

#include "block_int.h"

#include "block_int.h"

#include "block_int.h"

#include "aes.h"

#include "block_int.h"

#include "block_int.h"

#include "block_int.h"

#include "block_int.h"

#include "block_int.h"

#include "aes.h"

#include "aes.h"

#include "qemu-coroutine.h"

#include "block_int.h"

#include "block_int.h"

#include "thread-pool.h"

#include "block_int.h"

#include "thread-pool.h"

#include "block_int.h"

#include "block_int.h"

#include "block_int.h"

#include "block_int.h"

#include "blockjob.h"

#include "block_int.h"

#include "block_int.h"

#include "block_int.h"

#include "block_int.h"

#include "block_int.h"

#include "qemu-aio.h"

/*

 * QEMU System Emulator block driver

 *

 * Copyright (c) 2003 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_INT_H

#define BLOCK_INT_H

#include "block.h"

#include "qemu-option.h"

#include "qemu-queue.h"

#include "qemu-coroutine.h"

#include "qemu-timer.h"

#include "qapi-types.h"

#include "qapi/qmp/qerror.h"

#include "monitor.h"

#define BLOCK_FLAG_ENCRYPT          1

#define BLOCK_FLAG_COMPAT6          4

#define BLOCK_FLAG_LAZY_REFCOUNTS   8

#define BLOCK_IO_LIMIT_READ     0

#define BLOCK_IO_LIMIT_WRITE    1

#define BLOCK_IO_LIMIT_TOTAL    2

#define BLOCK_IO_SLICE_TIME     100000000

#define NANOSECONDS_PER_SECOND  1000000000.0

#define BLOCK_OPT_SIZE              "size"

#define BLOCK_OPT_ENCRYPT           "encryption"

#define BLOCK_OPT_COMPAT6           "compat6"

#define BLOCK_OPT_BACKING_FILE      "backing_file"

#define BLOCK_OPT_BACKING_FMT       "backing_fmt"

#define BLOCK_OPT_CLUSTER_SIZE      "cluster_size"

#define BLOCK_OPT_TABLE_SIZE        "table_size"

#define BLOCK_OPT_PREALLOC          "preallocation"

#define BLOCK_OPT_SUBFMT            "subformat"

#define BLOCK_OPT_COMPAT_LEVEL      "compat"

#define BLOCK_OPT_LAZY_REFCOUNTS    "lazy_refcounts"

typedef struct BdrvTrackedRequest BdrvTrackedRequest;

typedef struct BlockIOLimit {

    int64_t bps[3];

    int64_t iops[3];

} BlockIOLimit;

typedef struct BlockIOBaseValue {

    uint64_t bytes[2];

    uint64_t ios[2];

} BlockIOBaseValue;

struct BlockDriver {

    const char *format_name;

    int instance_size;

    int (*bdrv_probe)(const uint8_t *buf, int buf_size, const char *filename);

    int (*bdrv_probe_device)(const char *filename);

    /* For handling image reopen for split or non-split files */

    int (*bdrv_reopen_prepare)(BDRVReopenState *reopen_state,

                               BlockReopenQueue *queue, Error **errp);

    void (*bdrv_reopen_commit)(BDRVReopenState *reopen_state);

    void (*bdrv_reopen_abort)(BDRVReopenState *reopen_state);

    int (*bdrv_open)(BlockDriverState *bs, int flags);

    int (*bdrv_file_open)(BlockDriverState *bs, const char *filename, int flags);

    int (*bdrv_read)(BlockDriverState *bs, int64_t sector_num,

                     uint8_t *buf, int nb_sectors);

    int (*bdrv_write)(BlockDriverState *bs, int64_t sector_num,

                      const uint8_t *buf, int nb_sectors);

    void (*bdrv_close)(BlockDriverState *bs);

    void (*bdrv_rebind)(BlockDriverState *bs);

    int (*bdrv_create)(const char *filename, QEMUOptionParameter *options);

    int (*bdrv_set_key)(BlockDriverState *bs, const char *key);

    int (*bdrv_make_empty)(BlockDriverState *bs);

    /* aio */

    BlockDriverAIOCB *(*bdrv_aio_readv)(BlockDriverState *bs,

        int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,

        BlockDriverCompletionFunc *cb, void *opaque);

    BlockDriverAIOCB *(*bdrv_aio_writev)(BlockDriverState *bs,

        int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,

        BlockDriverCompletionFunc *cb, void *opaque);

    BlockDriverAIOCB *(*bdrv_aio_flush)(BlockDriverState *bs,

        BlockDriverCompletionFunc *cb, void *opaque);

    BlockDriverAIOCB *(*bdrv_aio_discard)(BlockDriverState *bs,

        int64_t sector_num, int nb_sectors,

        BlockDriverCompletionFunc *cb, void *opaque);

    int coroutine_fn (*bdrv_co_readv)(BlockDriverState *bs,

        int64_t sector_num, int nb_sectors, QEMUIOVector *qiov);

    int coroutine_fn (*bdrv_co_writev)(BlockDriverState *bs,

        int64_t sector_num, int nb_sectors, QEMUIOVector *qiov);

    /*

     * Efficiently zero a region of the disk image.  Typically an image format

     * would use a compact metadata representation to implement this.  This

     * function pointer may be NULL and .bdrv_co_writev() will be called

     * instead.

     */

    int coroutine_fn (*bdrv_co_write_zeroes)(BlockDriverState *bs,

        int64_t sector_num, int nb_sectors);

    int coroutine_fn (*bdrv_co_discard)(BlockDriverState *bs,

        int64_t sector_num, int nb_sectors);

    int coroutine_fn (*bdrv_co_is_allocated)(BlockDriverState *bs,

        int64_t sector_num, int nb_sectors, int *pnum);

    /*

     * Invalidate any cached meta-data.

     */

    void (*bdrv_invalidate_cache)(BlockDriverState *bs);

    /*

     * Flushes all data that was already written to the OS all the way down to

     * the disk (for example raw-posix calls fsync()).

     */

    int coroutine_fn (*bdrv_co_flush_to_disk)(BlockDriverState *bs);

    /*

     * Flushes all internal caches to the OS. The data may still sit in a

     * writeback cache of the host OS, but it will survive a crash of the qemu

     * process.

     */

    int coroutine_fn (*bdrv_co_flush_to_os)(BlockDriverState *bs);

    const char *protocol_name;

    int (*bdrv_truncate)(BlockDriverState *bs, int64_t offset);

    int64_t (*bdrv_getlength)(BlockDriverState *bs);

    int64_t (*bdrv_get_allocated_file_size)(BlockDriverState *bs);

    int (*bdrv_write_compressed)(BlockDriverState *bs, int64_t sector_num,

                                 const uint8_t *buf, int nb_sectors);

    int (*bdrv_snapshot_create)(BlockDriverState *bs,

                                QEMUSnapshotInfo *sn_info);

    int (*bdrv_snapshot_goto)(BlockDriverState *bs,

                              const char *snapshot_id);

    int (*bdrv_snapshot_delete)(BlockDriverState *bs, const char *snapshot_id);

    int (*bdrv_snapshot_list)(BlockDriverState *bs,

                              QEMUSnapshotInfo **psn_info);

    int (*bdrv_snapshot_load_tmp)(BlockDriverState *bs,

                                  const char *snapshot_name);

    int (*bdrv_get_info)(BlockDriverState *bs, BlockDriverInfo *bdi);

    int (*bdrv_save_vmstate)(BlockDriverState *bs, const uint8_t *buf,

                             int64_t pos, int size);

    int (*bdrv_load_vmstate)(BlockDriverState *bs, uint8_t *buf,

                             int64_t pos, int size);

    int (*bdrv_change_backing_file)(BlockDriverState *bs,

        const char *backing_file, const char *backing_fmt);

    /* removable device specific */

    int (*bdrv_is_inserted)(BlockDriverState *bs);

    int (*bdrv_media_changed)(BlockDriverState *bs);

    void (*bdrv_eject)(BlockDriverState *bs, bool eject_flag);

    void (*bdrv_lock_medium)(BlockDriverState *bs, bool locked);

    /* to control generic scsi devices */

    int (*bdrv_ioctl)(BlockDriverState *bs, unsigned long int req, void *buf);

    BlockDriverAIOCB *(*bdrv_aio_ioctl)(BlockDriverState *bs,

        unsigned long int req, void *buf,

        BlockDriverCompletionFunc *cb, void *opaque);

    /* List of options for creating images, terminated by name == NULL */

    QEMUOptionParameter *create_options;

    /*

     * Returns 0 for completed check, -errno for internal errors.

     * The check results are stored in result.

     */

    int (*bdrv_check)(BlockDriverState* bs, BdrvCheckResult *result,

        BdrvCheckMode fix);

    void (*bdrv_debug_event)(BlockDriverState *bs, BlkDebugEvent event);

    /* TODO Better pass a option string/QDict/QemuOpts to add any rule? */

    int (*bdrv_debug_breakpoint)(BlockDriverState *bs, const char *event,

        const char *tag);

    int (*bdrv_debug_resume)(BlockDriverState *bs, const char *tag);

    bool (*bdrv_debug_is_suspended)(BlockDriverState *bs, const char *tag);

    /*

     * Returns 1 if newly created images are guaranteed to contain only

     * zeros, 0 otherwise.

     */

    int (*bdrv_has_zero_init)(BlockDriverState *bs);

    QLIST_ENTRY(BlockDriver) list;

};

/*

 * Note: the function bdrv_append() copies and swaps contents of

 * BlockDriverStates, so if you add new fields to this struct, please

 * inspect bdrv_append() to determine if the new fields need to be

 * copied as well.

 */

struct BlockDriverState {

    int64_t total_sectors; /* if we are reading a disk image, give its

                              size in sectors */

    int read_only; /* if true, the media is read only */

    int open_flags; /* flags used to open the file, re-used for re-open */

    int encrypted; /* if true, the media is encrypted */

    int valid_key; /* if true, a valid encryption key has been set */

    int sg;        /* if true, the device is a /dev/sg* */

    int copy_on_read; /* if true, copy read backing sectors into image

                         note this is a reference count */

    BlockDriver *drv; /* NULL means no media */

    void *opaque;

    void *dev;                  /* attached device model, if any */

    /* TODO change to DeviceState when all users are qdevified */

    const BlockDevOps *dev_ops;

    void *dev_opaque;

    char filename[1024];

    char backing_file[1024]; /* if non zero, the image is a diff of

                                this file image */

    char backing_format[16]; /* if non-zero and backing_file exists */

    int is_temporary;

    BlockDriverState *backing_hd;

    BlockDriverState *file;

    NotifierList close_notifiers;

    /* number of in-flight copy-on-read requests */

    unsigned int copy_on_read_in_flight;

    /* the time for latest disk I/O */

    int64_t slice_time;

    int64_t slice_start;

    int64_t slice_end;

    BlockIOLimit io_limits;

    BlockIOBaseValue  io_base;

    CoQueue      throttled_reqs;

    QEMUTimer    *block_timer;

    bool         io_limits_enabled;

    /* I/O stats (display with "info blockstats"). */

    uint64_t nr_bytes[BDRV_MAX_IOTYPE];

    uint64_t nr_ops[BDRV_MAX_IOTYPE];

    uint64_t total_time_ns[BDRV_MAX_IOTYPE];

    uint64_t wr_highest_sector;

    /* Whether the disk can expand beyond total_sectors */

    int growable;

    /* the memory alignment required for the buffers handled by this driver */

    int buffer_alignment;

    /* do we need to tell the quest if we have a volatile write cache? */

    int enable_write_cache;

    /* NOTE: the following infos are only hints for real hardware

       drivers. They are not used by the block driver */

    BlockdevOnError on_read_error, on_write_error;

    bool iostatus_enabled;

    BlockDeviceIoStatus iostatus;

    char device_name[32];

    unsigned long *dirty_bitmap;

    int64_t dirty_count;

    int in_use; /* users other than guest access, eg. block migration */

    QTAILQ_ENTRY(BlockDriverState) list;

    QLIST_HEAD(, BdrvTrackedRequest) tracked_requests;

    /* long-running background operation */

    BlockJob *job;

};

int get_tmp_filename(char *filename, int size);

void bdrv_set_io_limits(BlockDriverState *bs,

                        BlockIOLimit *io_limits);

#ifdef _WIN32

int is_windows_drive(const char *filename);

#endif

void bdrv_emit_qmp_error_event(const BlockDriverState *bdrv,

                               enum MonitorEvent ev,

                               BlockErrorAction action, bool is_read);

/**

 * stream_start:

 * @bs: Block device to operate on.

 * @base: Block device that will become the new base, or %NULL to

 * flatten the whole backing file chain onto @bs.

 * @base_id: The file name that will be written to @bs as the new

 * backing file if the job completes.  Ignored if @base is %NULL.

 * @speed: The maximum speed, in bytes per second, or 0 for unlimited.

 * @on_error: The action to take upon error.

 * @cb: Completion function for the job.

 * @opaque: Opaque pointer value passed to @cb.

 * @errp: Error object.

 *

 * Start a streaming operation on @bs.  Clusters that are unallocated

 * in @bs, but allocated in any image between @base and @bs (both

 * exclusive) will be written to @bs.  At the end of a successful

 * streaming job, the backing file of @bs will be changed to

 * @base_id in the written image and to @base in the live BlockDriverState.

 */

void stream_start(BlockDriverState *bs, BlockDriverState *base,

                  const char *base_id, int64_t speed, BlockdevOnError on_error,

                  BlockDriverCompletionFunc *cb,

                  void *opaque, Error **errp);

/**

 * commit_start:

 * @bs: Top Block device

 * @base: Block device that will be written into, and become the new top

 * @speed: The maximum speed, in bytes per second, or 0 for unlimited.

 * @on_error: The action to take upon error.

 * @cb: Completion function for the job.

 * @opaque: Opaque pointer value passed to @cb.

 * @errp: Error object.

 *

 */

void commit_start(BlockDriverState *bs, BlockDriverState *base,

                 BlockDriverState *top, int64_t speed,

                 BlockdevOnError on_error, BlockDriverCompletionFunc *cb,

                 void *opaque, Error **errp);

/*

 * mirror_start:

 * @bs: Block device to operate on.

 * @target: Block device to write to.

 * @speed: The maximum speed, in bytes per second, or 0 for unlimited.

 * @mode: Whether to collapse all images in the chain to the target.

 * @on_source_error: The action to take upon error reading from the source.

 * @on_target_error: The action to take upon error writing to the target.

 * @cb: Completion function for the job.

 * @opaque: Opaque pointer value passed to @cb.

 * @errp: Error object.

 *

 * Start a mirroring operation on @bs.  Clusters that are allocated

 * in @bs will be written to @bs until the job is cancelled or

 * manually completed.  At the end of a successful mirroring job,

 * @bs will be switched to read from @target.

 */

void mirror_start(BlockDriverState *bs, BlockDriverState *target,

                  int64_t speed, MirrorSyncMode mode,

                  BlockdevOnError on_source_error,

                  BlockdevOnError on_target_error,

                  BlockDriverCompletionFunc *cb,

                  void *opaque, Error **errp);

#endif /* BLOCK_INT_H */

#include "nbd.h"

#include "blockjob.h"

#include "block_int.h"

#include "block.h"

#include "block.h"

#include "blockjob.h"

#include "block_int.h"

#include "qemu-coroutine.h"

/*

 * Declarations for long-running block device operations

 *

 * Copyright (c) 2011 IBM Corp.

 * Copyright (c) 2012 Red Hat, Inc.

 *

 * 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 BLOCKJOB_H