diff options
| -rw-r--r-- | block/nbd-client.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/block/nbd-client.c b/block/nbd-client.c index daa4392531..0a675d0fab 100644 --- a/block/nbd-client.c +++ b/block/nbd-client.c @@ -674,6 +674,9 @@ int nbd_client_co_preadv(BlockDriverState *bs, uint64_t offset, assert(bytes <= NBD_MAX_BUFFER_SIZE); assert(!flags); + if (!bytes) { + return 0; + } ret = nbd_co_send_request(bs, &request, NULL); if (ret < 0) { return ret; @@ -705,6 +708,9 @@ int nbd_client_co_pwritev(BlockDriverState *bs, uint64_t offset, assert(bytes <= NBD_MAX_BUFFER_SIZE); + if (!bytes) { + return 0; + } return nbd_co_request(bs, &request, qiov); } @@ -731,6 +737,9 @@ int nbd_client_co_pwrite_zeroes(BlockDriverState *bs, int64_t offset, request.flags |= NBD_CMD_FLAG_NO_HOLE; } + if (!bytes) { + return 0; + } return nbd_co_request(bs, &request, NULL); } @@ -759,7 +768,7 @@ int nbd_client_co_pdiscard(BlockDriverState *bs, int64_t offset, int bytes) }; assert(!(client->info.flags & NBD_FLAG_READ_ONLY)); - if (!(client->info.flags & NBD_FLAG_SEND_TRIM)) { + if (!(client->info.flags & NBD_FLAG_SEND_TRIM) || !bytes) { return 0; } |