diff options
| -rw-r--r-- | block/io.c | 4 | ||||
| -rw-r--r-- | block/preallocate.c | 15 | ||||
| -rw-r--r-- | include/block/block-common.h | 3 |
3 files changed, 18 insertions, 4 deletions
@@ -2203,6 +2203,7 @@ static int coroutine_fn bdrv_co_do_zero_pwritev(BdrvChild *child, padding = bdrv_init_padding(bs, offset, bytes, &pad); if (padding) { + assert(!(flags & BDRV_REQ_NO_WAIT)); bdrv_make_request_serialising(req, align); bdrv_padding_rmw_read(child, req, &pad, true); @@ -2339,6 +2340,7 @@ int coroutine_fn bdrv_co_pwritev_part(BdrvChild *child, * serialize the request to prevent interactions of the * widened region with other transactions. */ + assert(!(flags & BDRV_REQ_NO_WAIT)); bdrv_make_request_serialising(&req, align); bdrv_padding_rmw_read(child, &req, &pad, false); } @@ -3387,6 +3389,8 @@ static int coroutine_fn bdrv_co_copy_range_internal( /* TODO We can support BDRV_REQ_NO_FALLBACK here */ assert(!(read_flags & BDRV_REQ_NO_FALLBACK)); assert(!(write_flags & BDRV_REQ_NO_FALLBACK)); + assert(!(read_flags & BDRV_REQ_NO_WAIT)); + assert(!(write_flags & BDRV_REQ_NO_WAIT)); if (!dst || !dst->bs || !bdrv_is_inserted(dst->bs)) { return -ENOMEDIUM; diff --git a/block/preallocate.c b/block/preallocate.c index 1d4233f..e15cb8c 100644 --- a/block/preallocate.c +++ b/block/preallocate.c @@ -276,6 +276,10 @@ static bool coroutine_fn handle_write(BlockDriverState *bs, int64_t offset, int64_t end = offset + bytes; int64_t prealloc_start, prealloc_end; int ret; + uint32_t file_align = bs->file->bs->bl.request_alignment; + uint32_t prealloc_align = MAX(s->opts.prealloc_align, file_align); + + assert(QEMU_IS_ALIGNED(prealloc_align, file_align)); if (!has_prealloc_perms(bs)) { /* We don't have state neither should try to recover it */ @@ -320,9 +324,14 @@ static bool coroutine_fn handle_write(BlockDriverState *bs, int64_t offset, /* Now we want new preallocation, as request writes beyond s->file_end. */ - prealloc_start = want_merge_zero ? MIN(offset, s->file_end) : s->file_end; - prealloc_end = QEMU_ALIGN_UP(end + s->opts.prealloc_size, - s->opts.prealloc_align); + prealloc_start = QEMU_ALIGN_UP( + want_merge_zero ? MIN(offset, s->file_end) : s->file_end, + file_align); + prealloc_end = QEMU_ALIGN_UP( + MAX(prealloc_start, end) + s->opts.prealloc_size, + prealloc_align); + + want_merge_zero = want_merge_zero && (prealloc_start <= offset); ret = bdrv_co_pwrite_zeroes( bs->file, prealloc_start, prealloc_end - prealloc_start, diff --git a/include/block/block-common.h b/include/block/block-common.h index 0c5dc4a..fdb7306 100644 --- a/include/block/block-common.h +++ b/include/block/block-common.h @@ -112,7 +112,8 @@ typedef enum { /* * If we need to wait for other requests, just fail immediately. Used - * only together with BDRV_REQ_SERIALISING. + * only together with BDRV_REQ_SERIALISING. Used only with requests aligned + * to request_alignment (corresponding assertions are in block/io.c). */ BDRV_REQ_NO_WAIT = 0x400, |