We are gradually converting to byte-based interfaces, as they are
easier to reason about than sector-based. Convert another internal
type (no semantic change), and rename it to match the corresponding
public function rename.
Signed-off-by: Eric Blake <ebl...@redhat.com>
---
v6: rebase to split return interface change [Kevin], R-b dropped
v5: no change other than rebase to context
v4: no change
v3: rebase to allocation/mapping sense change, simple enough to keep R-b
v2: rebase to earlier changes
---
block/io.c | 68 ++++++++++++++++++++++----------------------------------------
1 file changed, 24 insertions(+), 44 deletions(-)
diff --git a/block/io.c b/block/io.c
index e8fda1a4b8..938325b756 100644
--- a/block/io.c
+++ b/block/io.c
@@ -1956,33 +1956,26 @@ early_out:
return ret;
}
-static int64_t coroutine_fn bdrv_co_get_block_status_above(BlockDriverState
*bs,
- BlockDriverState *base,
- bool want_zero,
- int64_t sector_num,
- int nb_sectors,
- int *pnum,
- BlockDriverState **file)
+static int coroutine_fn bdrv_co_block_status_above(BlockDriverState *bs,
+ BlockDriverState *base,
+ bool want_zero,
+ int64_t offset,
+ int64_t bytes,
+ int64_t *pnum,
+ int64_t *map,
+ BlockDriverState **file)
{
BlockDriverState *p;
- int64_t ret = 0;
+ int ret = 0;
bool first = true;
- int64_t map = 0;
assert(bs != base);
for (p = bs; p != base; p = backing_bs(p)) {
- int64_t count;
-
- ret = bdrv_co_block_status(p, want_zero,
- sector_num * BDRV_SECTOR_SIZE,
- nb_sectors * BDRV_SECTOR_SIZE, &count,
- &map, file);
+ ret = bdrv_co_block_status(p, want_zero, offset, bytes, pnum, map,
+ file);
if (ret < 0) {
break;
}
- assert(QEMU_IS_ALIGNED(count | map, BDRV_SECTOR_SIZE));
- ret |= map;
- *pnum = count >> BDRV_SECTOR_BITS;
if (ret & BDRV_BLOCK_ZERO && ret & BDRV_BLOCK_EOF && !first) {
/*
* Reading beyond the end of the file continues to read
@@ -1990,47 +1983,35 @@ static int64_t coroutine_fn
bdrv_co_get_block_status_above(BlockDriverState *bs,
* unallocated length we learned from an earlier
* iteration.
*/
- *pnum = nb_sectors;
+ *pnum = bytes;
}
if (ret & (BDRV_BLOCK_ZERO | BDRV_BLOCK_DATA)) {
break;
}
- /* [sector_num, pnum] unallocated on this layer, which could be only
- * the first part of [sector_num, nb_sectors]. */
- nb_sectors = MIN(nb_sectors, *pnum);
+ /* [offset, pnum] unallocated on this layer, which could be only
+ * the first part of [offset, bytes]. */
+ bytes = MIN(bytes, *pnum);
first = false;
}
return ret;
}
/* Coroutine wrapper for bdrv_get_block_status_above() */
-static void coroutine_fn bdrv_get_block_status_above_co_entry(void *opaque)
+static void coroutine_fn bdrv_block_status_above_co_entry(void *opaque)
{
BdrvCoBlockStatusData *data = opaque;
- int n = 0;
- int64_t ret;
- ret = bdrv_co_get_block_status_above(data->bs, data->base,
- data->want_zero,
- data->offset >> BDRV_SECTOR_BITS,
- data->bytes >> BDRV_SECTOR_BITS,
- &n,
- data->file);
- if (ret < 0) {
- assert(INT_MIN <= ret);
- data->ret = ret;
- } else {
- *data->pnum = n * BDRV_SECTOR_SIZE;
- *data->map = ret & BDRV_BLOCK_OFFSET_MASK;
- data->ret = ret & ~BDRV_BLOCK_OFFSET_MASK;
- }
+ data->ret = bdrv_co_block_status_above(data->bs, data->base,
+ data->want_zero,
+ data->offset, data->bytes,
+ data->pnum, data->map, data->file);
data->done = true;
}
/*
- * Synchronous wrapper around bdrv_co_get_block_status_above().
+ * Synchronous wrapper around bdrv_co_block_status_above().
*
- * See bdrv_co_get_block_status_above() for details.
+ * See bdrv_co_block_status_above() for details.
*/
static int bdrv_common_block_status_above(BlockDriverState *bs,
BlockDriverState *base,
@@ -2054,10 +2035,9 @@ static int
bdrv_common_block_status_above(BlockDriverState *bs,
if (qemu_in_coroutine()) {
/* Fast-path if already in coroutine context */
- bdrv_get_block_status_above_co_entry(&data);
+ bdrv_block_status_above_co_entry(&data);
} else {
- co = qemu_coroutine_create(bdrv_get_block_status_above_co_entry,
- &data);
+ co = qemu_coroutine_create(bdrv_block_status_above_co_entry, &data);
bdrv_coroutine_enter(bs, co);
BDRV_POLL_WHILE(bs, !data.done);
}
--
2.13.6
