Annotation of qemu/block.h, revision 1.1.1.11

1.1       root        1: #ifndef BLOCK_H
                      2: #define BLOCK_H
                      3: 
1.1.1.2   root        4: #include "qemu-aio.h"
                      5: #include "qemu-common.h"
1.1.1.5   root        6: #include "qemu-option.h"
1.1.1.6   root        7: #include "qobject.h"
1.1.1.2   root        8: 
1.1       root        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 */
1.1.1.2   root       32: #define BDRV_O_NOCACHE     0x0020 /* do not use the host page cache */
                     33: #define BDRV_O_CACHE_WB    0x0040 /* use write-back caching */
1.1.1.6   root       34: #define BDRV_O_NATIVE_AIO  0x0080 /* use native AIO instead of the thread pool */
1.1.1.8   root       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 */
1.1.1.2   root       37: 
1.1.1.8   root       38: #define BDRV_O_CACHE_MASK  (BDRV_O_NOCACHE | BDRV_O_CACHE_WB | BDRV_O_NO_FLUSH)
1.1       root       39: 
1.1.1.6   root       40: #define BDRV_SECTOR_BITS   9
1.1.1.8   root       41: #define BDRV_SECTOR_SIZE   (1ULL << BDRV_SECTOR_BITS)
                     42: #define BDRV_SECTOR_MASK   ~(BDRV_SECTOR_SIZE - 1)
1.1.1.6   root       43: 
1.1.1.8   root       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);
1.1.1.6   root       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);
1.1       root       59: 
                     60: void bdrv_init(void);
1.1.1.6   root       61: void bdrv_init_with_whitelist(void);
1.1.1.8   root       62: BlockDriver *bdrv_find_protocol(const char *filename);
1.1       root       63: BlockDriver *bdrv_find_format(const char *format_name);
1.1.1.6   root       64: BlockDriver *bdrv_find_whitelisted_format(const char *format_name);
1.1.1.5   root       65: int bdrv_create(BlockDriver *drv, const char* filename,
                     66:     QEMUOptionParameter *options);
1.1.1.8   root       67: int bdrv_create_file(const char* filename, QEMUOptionParameter *options);
1.1       root       68: BlockDriverState *bdrv_new(const char *device_name);
1.1.1.10  root       69: void bdrv_make_anon(BlockDriverState *bs);
1.1       root       70: void bdrv_delete(BlockDriverState *bs);
                     71: int bdrv_file_open(BlockDriverState **pbs, const char *filename, int flags);
1.1.1.8   root       72: int bdrv_open(BlockDriverState *bs, const char *filename, int flags,
                     73:               BlockDriver *drv);
1.1       root       74: void bdrv_close(BlockDriverState *bs);
1.1.1.8   root       75: int bdrv_attach(BlockDriverState *bs, DeviceState *qdev);
                     76: void bdrv_detach(BlockDriverState *bs, DeviceState *qdev);
                     77: DeviceState *bdrv_get_attached(BlockDriverState *bs);
1.1       root       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);
1.1.1.7   root       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);
1.1       root       90: int bdrv_truncate(BlockDriverState *bs, int64_t offset);
                     91: int64_t bdrv_getlength(BlockDriverState *bs);
1.1.1.11! root       92: int64_t bdrv_get_allocated_file_size(BlockDriverState *bs);
1.1       root       93: void bdrv_get_geometry(BlockDriverState *bs, uint64_t *nb_sectors_ptr);
1.1.1.2   root       94: void bdrv_guess_geometry(BlockDriverState *bs, int *pcyls, int *pheads, int *psecs);
1.1       root       95: int bdrv_commit(BlockDriverState *bs);
1.1.1.8   root       96: void bdrv_commit_all(void);
                     97: int bdrv_change_backing_file(BlockDriverState *bs,
                     98:     const char *backing_file, const char *backing_fmt);
1.1.1.5   root       99: void bdrv_register(BlockDriver *bdrv);
                    100: 
1.1.1.8   root      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: 
1.1       root      110: /* async block I/O */
                    111: typedef struct BlockDriverAIOCB BlockDriverAIOCB;
                    112: typedef void BlockDriverCompletionFunc(void *opaque, int ret);
1.1.1.6   root      113: typedef void BlockDriverDirtyHandler(BlockDriverState *bs, int64_t sector,
1.1.1.11! root      114:                                      int sector_num);
1.1.1.2   root      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);
1.1.1.6   root      121: BlockDriverAIOCB *bdrv_aio_flush(BlockDriverState *bs,
1.1.1.11! root      122:                                  BlockDriverCompletionFunc *cb, void *opaque);
1.1       root      123: void bdrv_aio_cancel(BlockDriverAIOCB *acb);
                    124: 
1.1.1.6   root      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: 
1.1.1.5   root      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: 
1.1       root      146: /* Ensure contents are flushed to disk.  */
1.1.1.9   root      147: int bdrv_flush(BlockDriverState *bs);
1.1.1.2   root      148: void bdrv_flush_all(void);
1.1.1.8   root      149: void bdrv_close_all(void);
1.1.1.2   root      150: 
1.1.1.9   root      151: int bdrv_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors);
1.1.1.8   root      152: int bdrv_has_zero_init(BlockDriverState *bs);
1.1.1.2   root      153: int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors,
1.1.1.11! root      154:                       int *pnum);
1.1       root      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);
1.1.1.11! root      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);
1.1       root      177: int bdrv_get_translation_hint(BlockDriverState *bs);
1.1.1.8   root      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);
1.1       root      182: int bdrv_is_removable(BlockDriverState *bs);
                    183: int bdrv_is_read_only(BlockDriverState *bs);
                    184: int bdrv_is_sg(BlockDriverState *bs);
1.1.1.6   root      185: int bdrv_enable_write_cache(BlockDriverState *bs);
1.1       root      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);
1.1.1.5   root      190: int bdrv_eject(BlockDriverState *bs, int eject_flag);
1.1       root      191: void bdrv_set_change_cb(BlockDriverState *bs,
1.1.1.9   root      192:                         void (*change_cb)(void *opaque, int reason),
                    193:                         void *opaque);
1.1       root      194: void bdrv_get_format(BlockDriverState *bs, char *buf, int buf_size);
                    195: BlockDriverState *bdrv_find(const char *name);
1.1.1.8   root      196: BlockDriverState *bdrv_next(BlockDriverState *bs);
1.1.1.3   root      197: void bdrv_iterate(void (*it)(void *opaque, BlockDriverState *bs),
                    198:                   void *opaque);
1.1       root      199: int bdrv_is_encrypted(BlockDriverState *bs);
1.1.1.3   root      200: int bdrv_key_required(BlockDriverState *bs);
1.1       root      201: int bdrv_set_key(BlockDriverState *bs, const char *key);
1.1.1.3   root      202: int bdrv_query_missing_keys(void);
1.1       root      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: 
1.1.1.3   root      210: const char *bdrv_get_encrypted_filename(BlockDriverState *bs);
1.1       root      211: void bdrv_get_backing_filename(BlockDriverState *bs,
                    212:                                char *filename, int filename_size);
1.1.1.8   root      213: int bdrv_can_snapshot(BlockDriverState *bs);
                    214: int bdrv_is_snapshot(BlockDriverState *bs);
                    215: BlockDriverState *bdrv_snapshots(void);
1.1       root      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);
1.1.1.9   root      223: int bdrv_snapshot_load_tmp(BlockDriverState *bs,
                    224:                            const char *snapshot_name);
1.1       root      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: 
1.1.1.5   root      233: int bdrv_save_vmstate(BlockDriverState *bs, const uint8_t *buf,
                    234:                       int64_t pos, int size);
1.1.1.4   root      235: 
1.1.1.5   root      236: int bdrv_load_vmstate(BlockDriverState *bs, uint8_t *buf,
                    237:                       int64_t pos, int size);
1.1.1.4   root      238: 
1.1.1.9   root      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: 
1.1.1.6   root      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);
1.1.1.8   root      249: int64_t bdrv_get_dirty_count(BlockDriverState *bs);
                    250: 
1.1.1.9   root      251: void bdrv_set_in_use(BlockDriverState *bs, int in_use);
                    252: int bdrv_in_use(BlockDriverState *bs);
1.1.1.8   root      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: 
1.1       root      305: #endif

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