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raw-posix: return get_block_status data and flags

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Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Paolo Bonzini 2013-09-04 19:00:35 +02:00 committed by Stefan Hajnoczi
parent facd6e2b5c
commit 63390a8d14
1 changed files with 10 additions and 7 deletions
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17
block/raw-posix.c
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@ -1089,7 +1089,7 @@ static int64_t coroutine_fn raw_co_get_block_status(BlockDriverState *bs,
int nb_sectors, int *pnum)
{
off_t start, data, hole;
int ret;
int64_t ret;
ret = fd_open(bs);
if (ret < 0) {
@ -1097,6 +1097,7 @@ static int64_t coroutine_fn raw_co_get_block_status(BlockDriverState *bs,
}
start = sector_num * BDRV_SECTOR_SIZE;
ret = BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID | start;
#ifdef CONFIG_FIEMAP
@ -1114,7 +1115,7 @@ static int64_t coroutine_fn raw_co_get_block_status(BlockDriverState *bs,
if (ioctl(s->fd, FS_IOC_FIEMAP, &f) == -1) {
/* Assume everything is allocated. */
*pnum = nb_sectors;
return 1;
return ret;
}
if (f.fm.fm_mapped_extents == 0) {
@ -1141,7 +1142,7 @@ static int64_t coroutine_fn raw_co_get_block_status(BlockDriverState *bs,
/* Most likely EINVAL. Assume everything is allocated. */
*pnum = nb_sectors;
return 1;
return ret;
}
if (hole > start) {
@ -1154,19 +1155,21 @@ static int64_t coroutine_fn raw_co_get_block_status(BlockDriverState *bs,
}
}
#else
*pnum = nb_sectors;
return 1;
data = 0;
hole = start + nb_sectors * BDRV_SECTOR_SIZE;
#endif
if (data <= start) {
/* On a data extent, compute sectors to the end of the extent. */
*pnum = MIN(nb_sectors, (hole - start) / BDRV_SECTOR_SIZE);
return 1;
} else {
/* On a hole, compute sectors to the beginning of the next extent. */
*pnum = MIN(nb_sectors, (data - start) / BDRV_SECTOR_SIZE);
return 0;
ret &= ~BDRV_BLOCK_DATA;
ret |= BDRV_BLOCK_ZERO;
}
return ret;
}
static coroutine_fn BlockDriverAIOCB *raw_aio_discard(BlockDriverState *bs,