diff options
Diffstat (limited to 'block.c')
| -rw-r--r-- | block.c | 144 |
1 files changed, 136 insertions, 8 deletions
@@ -494,12 +494,10 @@ int bdrv_write(BlockDriverState *bs, int64_t sector_num, } } -#if 0 /* not necessary now */ static int bdrv_pread_em(BlockDriverState *bs, int64_t offset, - void *buf1, int count1) + uint8_t *buf, int count1) { - uint8_t *buf = buf1; uint8_t tmp_buf[SECTOR_SIZE]; int len, nb_sectors, count; int64_t sector_num; @@ -542,9 +540,8 @@ static int bdrv_pread_em(BlockDriverState *bs, int64_t offset, } static int bdrv_pwrite_em(BlockDriverState *bs, int64_t offset, - const void *buf1, int count1) + const uint8_t *buf, int count1) { - const uint8_t *buf = buf1; uint8_t tmp_buf[SECTOR_SIZE]; int len, nb_sectors, count; int64_t sector_num; @@ -589,7 +586,6 @@ static int bdrv_pwrite_em(BlockDriverState *bs, int64_t offset, } return count1; } -#endif /** * Read with byte offsets (needed only for file protocols) @@ -602,7 +598,7 @@ int bdrv_pread(BlockDriverState *bs, int64_t offset, if (!drv) return -ENOENT; if (!drv->bdrv_pread) - return -ENOTSUP; + return bdrv_pread_em(bs, offset, buf1, count1); return drv->bdrv_pread(bs, offset, buf1, count1); } @@ -617,7 +613,7 @@ int bdrv_pwrite(BlockDriverState *bs, int64_t offset, if (!drv) return -ENOENT; if (!drv->bdrv_pwrite) - return -ENOTSUP; + return bdrv_pwrite_em(bs, offset, buf1, count1); return drv->bdrv_pwrite(bs, offset, buf1, count1); } @@ -859,6 +855,137 @@ void bdrv_get_backing_filename(BlockDriverState *bs, } } +int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num, + const uint8_t *buf, int nb_sectors) +{ + BlockDriver *drv = bs->drv; + if (!drv) + return -ENOENT; + if (!drv->bdrv_write_compressed) + return -ENOTSUP; + return drv->bdrv_write_compressed(bs, sector_num, buf, nb_sectors); +} + +int bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi) +{ + BlockDriver *drv = bs->drv; + if (!drv) + return -ENOENT; + if (!drv->bdrv_get_info) + return -ENOTSUP; + memset(bdi, 0, sizeof(*bdi)); + return drv->bdrv_get_info(bs, bdi); +} + +/**************************************************************/ +/* handling of snapshots */ + +int bdrv_snapshot_create(BlockDriverState *bs, + QEMUSnapshotInfo *sn_info) +{ + BlockDriver *drv = bs->drv; + if (!drv) + return -ENOENT; + if (!drv->bdrv_snapshot_create) + return -ENOTSUP; + return drv->bdrv_snapshot_create(bs, sn_info); +} + +int bdrv_snapshot_goto(BlockDriverState *bs, + const char *snapshot_id) +{ + BlockDriver *drv = bs->drv; + if (!drv) + return -ENOENT; + if (!drv->bdrv_snapshot_goto) + return -ENOTSUP; + return drv->bdrv_snapshot_goto(bs, snapshot_id); +} + +int bdrv_snapshot_delete(BlockDriverState *bs, const char *snapshot_id) +{ + BlockDriver *drv = bs->drv; + if (!drv) + return -ENOENT; + if (!drv->bdrv_snapshot_delete) + return -ENOTSUP; + return drv->bdrv_snapshot_delete(bs, snapshot_id); +} + +int bdrv_snapshot_list(BlockDriverState *bs, + QEMUSnapshotInfo **psn_info) +{ + BlockDriver *drv = bs->drv; + if (!drv) + return -ENOENT; + if (!drv->bdrv_snapshot_list) + return -ENOTSUP; + return drv->bdrv_snapshot_list(bs, psn_info); +} + +#define NB_SUFFIXES 4 + +char *get_human_readable_size(char *buf, int buf_size, int64_t size) +{ + static const char suffixes[NB_SUFFIXES] = "KMGT"; + int64_t base; + int i; + + if (size <= 999) { + snprintf(buf, buf_size, "%" PRId64, size); + } else { + base = 1024; + for(i = 0; i < NB_SUFFIXES; i++) { + if (size < (10 * base)) { + snprintf(buf, buf_size, "%0.1f%c", + (double)size / base, + suffixes[i]); + break; + } else if (size < (1000 * base) || i == (NB_SUFFIXES - 1)) { + snprintf(buf, buf_size, "%" PRId64 "%c", + ((size + (base >> 1)) / base), + suffixes[i]); + break; + } + base = base * 1024; + } + } + return buf; +} + +char *bdrv_snapshot_dump(char *buf, int buf_size, QEMUSnapshotInfo *sn) +{ + char buf1[128], date_buf[128], clock_buf[128]; + struct tm tm; + time_t ti; + int64_t secs; + + if (!sn) { + snprintf(buf, buf_size, + "%-10s%-20s%7s%20s%15s", + "ID", "TAG", "VM SIZE", "DATE", "VM CLOCK"); + } else { + ti = sn->date_sec; + localtime_r(&ti, &tm); + strftime(date_buf, sizeof(date_buf), + "%Y-%m-%d %H:%M:%S", &tm); + secs = sn->vm_clock_nsec / 1000000000; + snprintf(clock_buf, sizeof(clock_buf), + "%02d:%02d:%02d.%03d", + (int)(secs / 3600), + (int)((secs / 60) % 60), + (int)(secs % 60), + (int)((sn->vm_clock_nsec / 1000000) % 1000)); + snprintf(buf, buf_size, + "%-10s%-20s%7s%20s%15s", + sn->id_str, sn->name, + get_human_readable_size(buf1, sizeof(buf1), sn->vm_state_size), + date_buf, + clock_buf); + } + return buf; +} + /**************************************************************/ /* async I/Os */ @@ -1108,4 +1235,5 @@ void bdrv_init(void) bdrv_register(&bdrv_bochs); bdrv_register(&bdrv_vpc); bdrv_register(&bdrv_vvfat); + bdrv_register(&bdrv_qcow2); } |