From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by dpdk.org (Postfix) with ESMTP id 50214B12F for ; Fri, 13 Jun 2014 17:29:28 +0200 (CEST) Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga101.jf.intel.com with ESMTP; 13 Jun 2014 08:29:42 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.01,471,1400050800"; d="scan'208";a="528133570" Received: from irvmail001.ir.intel.com ([163.33.26.43]) by orsmga001.jf.intel.com with ESMTP; 13 Jun 2014 08:29:35 -0700 Received: from sivswdev02.ir.intel.com (sivswdev02.ir.intel.com [10.237.217.46]) by irvmail001.ir.intel.com (8.14.3/8.13.6/MailSET/Hub) with ESMTP id s5DFTYSf006722; Fri, 13 Jun 2014 16:29:34 +0100 Received: from sivswdev02.ir.intel.com (localhost [127.0.0.1]) by sivswdev02.ir.intel.com with ESMTP id s5DFTY2T020645; Fri, 13 Jun 2014 16:29:34 +0100 Received: (from aburakov@localhost) by sivswdev02.ir.intel.com with id s5DFTYZC020641; Fri, 13 Jun 2014 16:29:34 +0100 From: Anatoly Burakov To: dev@dpdk.org Date: Fri, 13 Jun 2014 16:29:26 +0100 Message-Id: X-Mailer: git-send-email 1.7.0.7 Subject: [dpdk-dev] [PATCH 0/7] Make DPDK tailqs fully local X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 13 Jun 2014 15:29:28 -0000 This issue was reported by OVS-DPDK project, and the fix should go to upstream DPDK. This is not memnic-related - this is to do with DPDK's rte_ivshmem library. Every DPDK data structure has a corresponding TAILQ reserved for it in the runtime config file. Those TAILQs are fully local to the process, however most data structures contain pointers to next entry in the TAILQ. Since the data structures such as rings are shared in their entirety, those TAILQ pointers are shared as well. Meaning that, after a successful rte_ring creation, the tailq_next pointer of the last ring in the TAILQ will be updated with a pointer to a ring which may not be present in the address space of another process (i.e. a ring that may be host-local or guest-local, and not shared over IVSHMEM). Any successive ring create/lookup on the other side of IVSHMEM will result in trying to dereference an invalid pointer. This patchset fixes this problem by creating a default tailq entry that may be used by any data structure that chooses to use TAILQs. This default TAILQ entry will consist of a tailq_next/tailq_prev pointers, and an opaque pointer to arbitrary data. All TAILQ pointers from data structures themselves will be removed and replaced by those generic TAILQ entries, thus fixing the problem of potentially exposing local address space to shared structures. Technically, only rte_ring structure require modification, because IVSHMEM is only using memzones (which aren't in TAILQs) and rings, but for consistency's sake other TAILQ-based data structures were adapted as well. Anatoly Burakov (7): rte_tailq: change rte_dummy to rte_tailq_entry, add data pointer rte_ring: make ring tailq completely local rte_hash: make rte_hash tailq fully local rte_fbk_hash: make rte_fbk_hash tailq fully local rte_mempool: make mempool tailq fully local rte_lpm: make lpm tailq fully local rte_lpm6: make lpm6 tailq fully local app/test/test_tailq.c | 33 ++++++++-------- lib/librte_eal/common/eal_common_tailqs.c | 2 +- lib/librte_eal/common/include/rte_tailq.h | 9 +++-- lib/librte_eal/linuxapp/eal/eal_ivshmem.c | 14 ++++++- lib/librte_hash/rte_fbk_hash.c | 66 ++++++++++++++++++++++++------- lib/librte_hash/rte_fbk_hash.h | 3 -- lib/librte_hash/rte_hash.c | 54 ++++++++++++++++++++----- lib/librte_hash/rte_hash.h | 2 - lib/librte_lpm/rte_lpm.c | 54 ++++++++++++++++++++----- lib/librte_lpm/rte_lpm.h | 2 - lib/librte_lpm/rte_lpm6.c | 55 ++++++++++++++++++++------ lib/librte_mempool/Makefile | 3 +- lib/librte_mempool/rte_mempool.c | 37 ++++++++++++----- lib/librte_mempool/rte_mempool.h | 2 - lib/librte_ring/Makefile | 4 +- lib/librte_ring/rte_ring.c | 33 ++++++++++++---- lib/librte_ring/rte_ring.h | 2 - 17 files changed, 278 insertions(+), 97 deletions(-) -- 1.8.1.4