uint32_t *bat_bitmap;
unsigned int bat_size;
+ int64_t data_end;
uint64_t prealloc_size;
ParallelsPreallocMode prealloc_mode;
BDRVParallelsState *s = bs->opaque;
uint32_t idx, offset;
int64_t pos;
- int ret;
idx = sector_num / s->tracks;
offset = sector_num % s->tracks;
}
pos = bdrv_getlength(bs->file) >> BDRV_SECTOR_BITS;
- if (s->prealloc_mode == PRL_PREALLOC_MODE_TRUNCATE) {
- ret = bdrv_truncate(bs->file, (pos + s->tracks) << BDRV_SECTOR_BITS);
- } else {
- ret = bdrv_write_zeroes(bs->file, pos, s->tracks, 0);
- }
- if (ret < 0) {
- return ret;
+ if (s->data_end + s->tracks > pos) {
+ int ret;
+ if (s->prealloc_mode == PRL_PREALLOC_MODE_FALLOCATE) {
+ ret = bdrv_write_zeroes(bs->file, s->data_end,
+ s->prealloc_size, 0);
+ } else {
+ ret = bdrv_truncate(bs->file,
+ (s->data_end + s->prealloc_size) << BDRV_SECTOR_BITS);
+ }
+ if (ret < 0) {
+ return ret;
+ }
}
+ pos = s->data_end;
+ s->data_end += s->tracks;
s->bat_bitmap[idx] = cpu_to_le32(pos / s->off_multiplier);
{
BDRVParallelsState *s = bs->opaque;
ParallelsHeader ph;
- int ret, size;
+ int ret, size, i;
QemuOpts *opts = NULL;
Error *local_err = NULL;
char *buf;
ret = -ENOMEM;
goto fail;
}
- if (le32_to_cpu(ph.data_off) < s->header_size) {
+ s->data_end = le32_to_cpu(ph.data_off);
+ if (s->data_end == 0) {
+ s->data_end = ROUND_UP(bat_entry_off(s->bat_size), BDRV_SECTOR_SIZE);
+ }
+ if (s->data_end < s->header_size) {
/* there is not enough unused space to fit to block align between BAT
and actual data. We can't avoid read-modify-write... */
s->header_size = size;
}
s->bat_bitmap = (uint32_t *)(s->header + 1);
+ for (i = 0; i < s->bat_size; i++) {
+ int64_t off = bat2sect(s, i);
+ if (off >= s->data_end) {
+ s->data_end = off + s->tracks;
+ }
+ }
+
if (le32_to_cpu(ph.inuse) == HEADER_INUSE_MAGIC) {
/* Image was not closed correctly. The check is mandatory */
s->header_unclean = true;
parallels_update_header(bs);
}
+ if (bs->open_flags & BDRV_O_RDWR) {
+ bdrv_truncate(bs->file, s->data_end << BDRV_SECTOR_BITS);
+ }
+
g_free(s->bat_dirty_bmap);
qemu_vfree(s->header);
}