block/gluster: Do not force-cap *pnum
bdrv_co_block_status() does it for us, we do not need to do it here. The advantage of not capping *pnum is that bdrv_co_block_status() can cache larger data regions than requested by its caller. Signed-off-by: Hanna Reitz <hreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Message-Id: <20210812084148.14458-6-hreitz@redhat.com>
This commit is contained in:
parent
869e7ee827
commit
72b4cabe5e
|
@ -1461,7 +1461,8 @@ exit:
|
||||||
* the specified offset) that are known to be in the same
|
* the specified offset) that are known to be in the same
|
||||||
* allocated/unallocated state.
|
* allocated/unallocated state.
|
||||||
*
|
*
|
||||||
* 'bytes' is the max value 'pnum' should be set to.
|
* 'bytes' is a soft cap for 'pnum'. If the information is free, 'pnum' may
|
||||||
|
* well exceed it.
|
||||||
*
|
*
|
||||||
* (Based on raw_co_block_status() from file-posix.c.)
|
* (Based on raw_co_block_status() from file-posix.c.)
|
||||||
*/
|
*/
|
||||||
|
@ -1502,7 +1503,7 @@ static int coroutine_fn qemu_gluster_co_block_status(BlockDriverState *bs,
|
||||||
} else if (data == offset) {
|
} else if (data == offset) {
|
||||||
/* On a data extent, compute bytes to the end of the extent,
|
/* On a data extent, compute bytes to the end of the extent,
|
||||||
* possibly including a partial sector at EOF. */
|
* possibly including a partial sector at EOF. */
|
||||||
*pnum = MIN(bytes, hole - offset);
|
*pnum = hole - offset;
|
||||||
|
|
||||||
/*
|
/*
|
||||||
* We are not allowed to return partial sectors, though, so
|
* We are not allowed to return partial sectors, though, so
|
||||||
|
@ -1521,7 +1522,7 @@ static int coroutine_fn qemu_gluster_co_block_status(BlockDriverState *bs,
|
||||||
} else {
|
} else {
|
||||||
/* On a hole, compute bytes to the beginning of the next extent. */
|
/* On a hole, compute bytes to the beginning of the next extent. */
|
||||||
assert(hole == offset);
|
assert(hole == offset);
|
||||||
*pnum = MIN(bytes, data - offset);
|
*pnum = data - offset;
|
||||||
ret = BDRV_BLOCK_ZERO;
|
ret = BDRV_BLOCK_ZERO;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|
Loading…
Reference in New Issue