File:  [Qemu by Fabrice Bellard] / qemu / block.h
Revision 1.1.1.11 (vendor branch): download - view: text, annotated - select for diffs
Tue Apr 24 18:56:31 2018 UTC (3 years, 1 month ago) by root
Branches: qemu, MAIN
CVS tags: qemu1000, qemu0151, HEAD
qemu 0.15.1

    1: #ifndef BLOCK_H
    2: #define BLOCK_H
    3: 
    4: #include "qemu-aio.h"
    5: #include "qemu-common.h"
    6: #include "qemu-option.h"
    7: #include "qobject.h"
    8: 
    9: /* block.c */
   10: typedef struct BlockDriver BlockDriver;
   11: 
   12: typedef struct BlockDriverInfo {
   13:     /* in bytes, 0 if irrelevant */
   14:     int cluster_size;
   15:     /* offset at which the VM state can be saved (0 if not possible) */
   16:     int64_t vm_state_offset;
   17: } BlockDriverInfo;
   18: 
   19: typedef struct QEMUSnapshotInfo {
   20:     char id_str[128]; /* unique snapshot id */
   21:     /* the following fields are informative. They are not needed for
   22:        the consistency of the snapshot */
   23:     char name[256]; /* user choosen name */
   24:     uint32_t vm_state_size; /* VM state info size */
   25:     uint32_t date_sec; /* UTC date of the snapshot */
   26:     uint32_t date_nsec;
   27:     uint64_t vm_clock_nsec; /* VM clock relative to boot */
   28: } QEMUSnapshotInfo;
   29: 
   30: #define BDRV_O_RDWR        0x0002
   31: #define BDRV_O_SNAPSHOT    0x0008 /* open the file read only and save writes in a snapshot */
   32: #define BDRV_O_NOCACHE     0x0020 /* do not use the host page cache */
   33: #define BDRV_O_CACHE_WB    0x0040 /* use write-back caching */
   34: #define BDRV_O_NATIVE_AIO  0x0080 /* use native AIO instead of the thread pool */
   35: #define BDRV_O_NO_BACKING  0x0100 /* don't open the backing file */
   36: #define BDRV_O_NO_FLUSH    0x0200 /* disable flushing on this disk */
   37: 
   38: #define BDRV_O_CACHE_MASK  (BDRV_O_NOCACHE | BDRV_O_CACHE_WB | BDRV_O_NO_FLUSH)
   39: 
   40: #define BDRV_SECTOR_BITS   9
   41: #define BDRV_SECTOR_SIZE   (1ULL << BDRV_SECTOR_BITS)
   42: #define BDRV_SECTOR_MASK   ~(BDRV_SECTOR_SIZE - 1)
   43: 
   44: typedef enum {
   45:     BLOCK_ERR_REPORT, BLOCK_ERR_IGNORE, BLOCK_ERR_STOP_ENOSPC,
   46:     BLOCK_ERR_STOP_ANY
   47: } BlockErrorAction;
   48: 
   49: typedef enum {
   50:     BDRV_ACTION_REPORT, BDRV_ACTION_IGNORE, BDRV_ACTION_STOP
   51: } BlockMonEventAction;
   52: 
   53: void bdrv_mon_event(const BlockDriverState *bdrv,
   54:                     BlockMonEventAction action, int is_read);
   55: void bdrv_info_print(Monitor *mon, const QObject *data);
   56: void bdrv_info(Monitor *mon, QObject **ret_data);
   57: void bdrv_stats_print(Monitor *mon, const QObject *data);
   58: void bdrv_info_stats(Monitor *mon, QObject **ret_data);
   59: 
   60: void bdrv_init(void);
   61: void bdrv_init_with_whitelist(void);
   62: BlockDriver *bdrv_find_protocol(const char *filename);
   63: BlockDriver *bdrv_find_format(const char *format_name);
   64: BlockDriver *bdrv_find_whitelisted_format(const char *format_name);
   65: int bdrv_create(BlockDriver *drv, const char* filename,
   66:     QEMUOptionParameter *options);
   67: int bdrv_create_file(const char* filename, QEMUOptionParameter *options);
   68: BlockDriverState *bdrv_new(const char *device_name);
   69: void bdrv_make_anon(BlockDriverState *bs);
   70: void bdrv_delete(BlockDriverState *bs);
   71: int bdrv_file_open(BlockDriverState **pbs, const char *filename, int flags);
   72: int bdrv_open(BlockDriverState *bs, const char *filename, int flags,
   73:               BlockDriver *drv);
   74: void bdrv_close(BlockDriverState *bs);
   75: int bdrv_attach(BlockDriverState *bs, DeviceState *qdev);
   76: void bdrv_detach(BlockDriverState *bs, DeviceState *qdev);
   77: DeviceState *bdrv_get_attached(BlockDriverState *bs);
   78: int bdrv_read(BlockDriverState *bs, int64_t sector_num,
   79:               uint8_t *buf, int nb_sectors);
   80: int bdrv_write(BlockDriverState *bs, int64_t sector_num,
   81:                const uint8_t *buf, int nb_sectors);
   82: int bdrv_pread(BlockDriverState *bs, int64_t offset,
   83:                void *buf, int count);
   84: int bdrv_pwrite(BlockDriverState *bs, int64_t offset,
   85:                 const void *buf, int count);
   86: int bdrv_pwrite_sync(BlockDriverState *bs, int64_t offset,
   87:     const void *buf, int count);
   88: int bdrv_write_sync(BlockDriverState *bs, int64_t sector_num,
   89:     const uint8_t *buf, int nb_sectors);
   90: int bdrv_truncate(BlockDriverState *bs, int64_t offset);
   91: int64_t bdrv_getlength(BlockDriverState *bs);
   92: int64_t bdrv_get_allocated_file_size(BlockDriverState *bs);
   93: void bdrv_get_geometry(BlockDriverState *bs, uint64_t *nb_sectors_ptr);
   94: void bdrv_guess_geometry(BlockDriverState *bs, int *pcyls, int *pheads, int *psecs);
   95: int bdrv_commit(BlockDriverState *bs);
   96: void bdrv_commit_all(void);
   97: int bdrv_change_backing_file(BlockDriverState *bs,
   98:     const char *backing_file, const char *backing_fmt);
   99: void bdrv_register(BlockDriver *bdrv);
  100: 
  101: 
  102: typedef struct BdrvCheckResult {
  103:     int corruptions;
  104:     int leaks;
  105:     int check_errors;
  106: } BdrvCheckResult;
  107: 
  108: int bdrv_check(BlockDriverState *bs, BdrvCheckResult *res);
  109: 
  110: /* async block I/O */
  111: typedef struct BlockDriverAIOCB BlockDriverAIOCB;
  112: typedef void BlockDriverCompletionFunc(void *opaque, int ret);
  113: typedef void BlockDriverDirtyHandler(BlockDriverState *bs, int64_t sector,
  114:                                      int sector_num);
  115: BlockDriverAIOCB *bdrv_aio_readv(BlockDriverState *bs, int64_t sector_num,
  116:                                  QEMUIOVector *iov, int nb_sectors,
  117:                                  BlockDriverCompletionFunc *cb, void *opaque);
  118: BlockDriverAIOCB *bdrv_aio_writev(BlockDriverState *bs, int64_t sector_num,
  119:                                   QEMUIOVector *iov, int nb_sectors,
  120:                                   BlockDriverCompletionFunc *cb, void *opaque);
  121: BlockDriverAIOCB *bdrv_aio_flush(BlockDriverState *bs,
  122:                                  BlockDriverCompletionFunc *cb, void *opaque);
  123: void bdrv_aio_cancel(BlockDriverAIOCB *acb);
  124: 
  125: typedef struct BlockRequest {
  126:     /* Fields to be filled by multiwrite caller */
  127:     int64_t sector;
  128:     int nb_sectors;
  129:     QEMUIOVector *qiov;
  130:     BlockDriverCompletionFunc *cb;
  131:     void *opaque;
  132: 
  133:     /* Filled by multiwrite implementation */
  134:     int error;
  135: } BlockRequest;
  136: 
  137: int bdrv_aio_multiwrite(BlockDriverState *bs, BlockRequest *reqs,
  138:     int num_reqs);
  139: 
  140: /* sg packet commands */
  141: int bdrv_ioctl(BlockDriverState *bs, unsigned long int req, void *buf);
  142: BlockDriverAIOCB *bdrv_aio_ioctl(BlockDriverState *bs,
  143:         unsigned long int req, void *buf,
  144:         BlockDriverCompletionFunc *cb, void *opaque);
  145: 
  146: /* Ensure contents are flushed to disk.  */
  147: int bdrv_flush(BlockDriverState *bs);
  148: void bdrv_flush_all(void);
  149: void bdrv_close_all(void);
  150: 
  151: int bdrv_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors);
  152: int bdrv_has_zero_init(BlockDriverState *bs);
  153: int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors,
  154:                       int *pnum);
  155: 
  156: #define BIOS_ATA_TRANSLATION_AUTO   0
  157: #define BIOS_ATA_TRANSLATION_NONE   1
  158: #define BIOS_ATA_TRANSLATION_LBA    2
  159: #define BIOS_ATA_TRANSLATION_LARGE  3
  160: #define BIOS_ATA_TRANSLATION_RECHS  4
  161: 
  162: void bdrv_set_geometry_hint(BlockDriverState *bs,
  163:                             int cyls, int heads, int secs);
  164: void bdrv_set_translation_hint(BlockDriverState *bs, int translation);
  165: void bdrv_get_geometry_hint(BlockDriverState *bs,
  166:                             int *pcyls, int *pheads, int *psecs);
  167: typedef enum FDriveType {
  168:     FDRIVE_DRV_144  = 0x00,   /* 1.44 MB 3"5 drive      */
  169:     FDRIVE_DRV_288  = 0x01,   /* 2.88 MB 3"5 drive      */
  170:     FDRIVE_DRV_120  = 0x02,   /* 1.2  MB 5"25 drive     */
  171:     FDRIVE_DRV_NONE = 0x03,   /* No drive connected     */
  172: } FDriveType;
  173: 
  174: void bdrv_get_floppy_geometry_hint(BlockDriverState *bs, int *nb_heads,
  175:                                    int *max_track, int *last_sect,
  176:                                    FDriveType drive_in, FDriveType *drive);
  177: int bdrv_get_translation_hint(BlockDriverState *bs);
  178: void bdrv_set_on_error(BlockDriverState *bs, BlockErrorAction on_read_error,
  179:                        BlockErrorAction on_write_error);
  180: BlockErrorAction bdrv_get_on_error(BlockDriverState *bs, int is_read);
  181: void bdrv_set_removable(BlockDriverState *bs, int removable);
  182: int bdrv_is_removable(BlockDriverState *bs);
  183: int bdrv_is_read_only(BlockDriverState *bs);
  184: int bdrv_is_sg(BlockDriverState *bs);
  185: int bdrv_enable_write_cache(BlockDriverState *bs);
  186: int bdrv_is_inserted(BlockDriverState *bs);
  187: int bdrv_media_changed(BlockDriverState *bs);
  188: int bdrv_is_locked(BlockDriverState *bs);
  189: void bdrv_set_locked(BlockDriverState *bs, int locked);
  190: int bdrv_eject(BlockDriverState *bs, int eject_flag);
  191: void bdrv_set_change_cb(BlockDriverState *bs,
  192:                         void (*change_cb)(void *opaque, int reason),
  193:                         void *opaque);
  194: void bdrv_get_format(BlockDriverState *bs, char *buf, int buf_size);
  195: BlockDriverState *bdrv_find(const char *name);
  196: BlockDriverState *bdrv_next(BlockDriverState *bs);
  197: void bdrv_iterate(void (*it)(void *opaque, BlockDriverState *bs),
  198:                   void *opaque);
  199: int bdrv_is_encrypted(BlockDriverState *bs);
  200: int bdrv_key_required(BlockDriverState *bs);
  201: int bdrv_set_key(BlockDriverState *bs, const char *key);
  202: int bdrv_query_missing_keys(void);
  203: void bdrv_iterate_format(void (*it)(void *opaque, const char *name),
  204:                          void *opaque);
  205: const char *bdrv_get_device_name(BlockDriverState *bs);
  206: int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num,
  207:                           const uint8_t *buf, int nb_sectors);
  208: int bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi);
  209: 
  210: const char *bdrv_get_encrypted_filename(BlockDriverState *bs);
  211: void bdrv_get_backing_filename(BlockDriverState *bs,
  212:                                char *filename, int filename_size);
  213: int bdrv_can_snapshot(BlockDriverState *bs);
  214: int bdrv_is_snapshot(BlockDriverState *bs);
  215: BlockDriverState *bdrv_snapshots(void);
  216: int bdrv_snapshot_create(BlockDriverState *bs,
  217:                          QEMUSnapshotInfo *sn_info);
  218: int bdrv_snapshot_goto(BlockDriverState *bs,
  219:                        const char *snapshot_id);
  220: int bdrv_snapshot_delete(BlockDriverState *bs, const char *snapshot_id);
  221: int bdrv_snapshot_list(BlockDriverState *bs,
  222:                        QEMUSnapshotInfo **psn_info);
  223: int bdrv_snapshot_load_tmp(BlockDriverState *bs,
  224:                            const char *snapshot_name);
  225: char *bdrv_snapshot_dump(char *buf, int buf_size, QEMUSnapshotInfo *sn);
  226: 
  227: char *get_human_readable_size(char *buf, int buf_size, int64_t size);
  228: int path_is_absolute(const char *path);
  229: void path_combine(char *dest, int dest_size,
  230:                   const char *base_path,
  231:                   const char *filename);
  232: 
  233: int bdrv_save_vmstate(BlockDriverState *bs, const uint8_t *buf,
  234:                       int64_t pos, int size);
  235: 
  236: int bdrv_load_vmstate(BlockDriverState *bs, uint8_t *buf,
  237:                       int64_t pos, int size);
  238: 
  239: int bdrv_img_create(const char *filename, const char *fmt,
  240:                     const char *base_filename, const char *base_fmt,
  241:                     char *options, uint64_t img_size, int flags);
  242: 
  243: #define BDRV_SECTORS_PER_DIRTY_CHUNK 2048
  244: 
  245: void bdrv_set_dirty_tracking(BlockDriverState *bs, int enable);
  246: int bdrv_get_dirty(BlockDriverState *bs, int64_t sector);
  247: void bdrv_reset_dirty(BlockDriverState *bs, int64_t cur_sector,
  248:                       int nr_sectors);
  249: int64_t bdrv_get_dirty_count(BlockDriverState *bs);
  250: 
  251: void bdrv_set_in_use(BlockDriverState *bs, int in_use);
  252: int bdrv_in_use(BlockDriverState *bs);
  253: 
  254: typedef enum {
  255:     BLKDBG_L1_UPDATE,
  256: 
  257:     BLKDBG_L1_GROW_ALLOC_TABLE,
  258:     BLKDBG_L1_GROW_WRITE_TABLE,
  259:     BLKDBG_L1_GROW_ACTIVATE_TABLE,
  260: 
  261:     BLKDBG_L2_LOAD,
  262:     BLKDBG_L2_UPDATE,
  263:     BLKDBG_L2_UPDATE_COMPRESSED,
  264:     BLKDBG_L2_ALLOC_COW_READ,
  265:     BLKDBG_L2_ALLOC_WRITE,
  266: 
  267:     BLKDBG_READ,
  268:     BLKDBG_READ_AIO,
  269:     BLKDBG_READ_BACKING,
  270:     BLKDBG_READ_BACKING_AIO,
  271:     BLKDBG_READ_COMPRESSED,
  272: 
  273:     BLKDBG_WRITE_AIO,
  274:     BLKDBG_WRITE_COMPRESSED,
  275: 
  276:     BLKDBG_VMSTATE_LOAD,
  277:     BLKDBG_VMSTATE_SAVE,
  278: 
  279:     BLKDBG_COW_READ,
  280:     BLKDBG_COW_WRITE,
  281: 
  282:     BLKDBG_REFTABLE_LOAD,
  283:     BLKDBG_REFTABLE_GROW,
  284: 
  285:     BLKDBG_REFBLOCK_LOAD,
  286:     BLKDBG_REFBLOCK_UPDATE,
  287:     BLKDBG_REFBLOCK_UPDATE_PART,
  288:     BLKDBG_REFBLOCK_ALLOC,
  289:     BLKDBG_REFBLOCK_ALLOC_HOOKUP,
  290:     BLKDBG_REFBLOCK_ALLOC_WRITE,
  291:     BLKDBG_REFBLOCK_ALLOC_WRITE_BLOCKS,
  292:     BLKDBG_REFBLOCK_ALLOC_WRITE_TABLE,
  293:     BLKDBG_REFBLOCK_ALLOC_SWITCH_TABLE,
  294: 
  295:     BLKDBG_CLUSTER_ALLOC,
  296:     BLKDBG_CLUSTER_ALLOC_BYTES,
  297:     BLKDBG_CLUSTER_FREE,
  298: 
  299:     BLKDBG_EVENT_MAX,
  300: } BlkDebugEvent;
  301: 
  302: #define BLKDBG_EVENT(bs, evt) bdrv_debug_event(bs, evt)
  303: void bdrv_debug_event(BlockDriverState *bs, BlkDebugEvent event);
  304: 
  305: #endif

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