diff options
Diffstat (limited to 'lib9p/srv.c')
| -rw-r--r-- | lib9p/srv.c | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/lib9p/srv.c b/lib9p/srv.c index 50d0b78..2c26ffe 100644 --- a/lib9p/srv.c +++ b/lib9p/srv.c @@ -980,13 +980,20 @@ static void handle_Tread(struct _lib9p_srv_req *ctx, fidinfo->dir.idx = idx+num; fidinfo->dir.off = req->offset + len; } else { - struct iovec iov; - LO_CALL(fidinfo->file.io, pread, &ctx->ctx, req->count, req->offset, &iov); + LO_CALL(fidinfo->file.io, pread, &ctx->ctx, req->count, req->offset, + &resp->iov, &resp->iovcnt); if (!lib9p_ctx_has_error(&ctx->ctx.basectx)) { - resp->count = iov.iov_len; - resp->data = iov.iov_base; - if (resp->count > req->count) - resp->count = req->count; + resp->count = 0; + assert(resp->iovcnt >= 0); + if (resp->iovcnt) { + assert(resp->iov); + for (int i = 0; i < resp->iovcnt; i++) { + assert(resp->iov[i].iov_len == 0 || resp->iov[i].iov_base); + bool overflowed = __builtin_add_overflow(resp->count, resp->iov[i].iov_len, &resp->count); + assert(!overflowed); + } + } + assert(resp->count <= req->count); } } } |