When adding a DPDK port to a bridge using ovs-vswitchd with DPDK,
the vmxnet3 device fails to activate due to mismatched magic number.
Doing this will incur the following operations: start the port,
stop the port, reconfigure and re-start the port. The reconfig
could request different number of tx/rx queues but the driver
bypasses allocating the queuedesc memzone of proper size (which
depends on the queue size) if there is an existing one. This
results in a memzone with wrong size and potential invalid memory
access. To fix this, this change will free the memzone if found
and reserve a new one.
Signed-off-by: Yong Wang <yongwang at vmware.com>
Reviewed-by: Guolin Yang <gyang at vmware.com>
Reviewed-by: Daniele Di Proietto <ddiproietto at vmware.com>
Tested-by: Daniele Di Proietto <ddiproietto at vmware.com>
---
drivers/net/vmxnet3/vmxnet3_ethdev.c | 27 ++++++++++++++++++++-------
1 file changed, 20 insertions(+), 7 deletions(-)
diff --git a/drivers/net/vmxnet3/vmxnet3_ethdev.c
b/drivers/net/vmxnet3/vmxnet3_ethdev.c
index a2cb2dd..6b1e720 100644
--- a/drivers/net/vmxnet3/vmxnet3_ethdev.c
+++ b/drivers/net/vmxnet3/vmxnet3_ethdev.c
@@ -131,7 +131,8 @@ static const struct eth_dev_ops vmxnet3_eth_dev_ops = {
static const struct rte_memzone *
gpa_zone_reserve(struct rte_eth_dev *dev, uint32_t size,
- const char *post_string, int socket_id, uint16_t align)
+ const char *post_string, int socket_id,
+ uint16_t align, bool reuse)
{
char z_name[RTE_MEMZONE_NAMESIZE];
const struct rte_memzone *mz;
@@ -140,6 +141,13 @@ gpa_zone_reserve(struct rte_eth_dev *dev, uint32_t size,
dev->driver->pci_drv.name, dev->data->port_id, post_string);
mz = rte_memzone_lookup(z_name);
+ if (!reuse) {
+ if (mz)
+ rte_memzone_free(mz);
+ return rte_memzone_reserve_aligned(z_name, size, socket_id,
+ 0, align);
+ }
+
if (mz)
return mz;
@@ -384,7 +392,7 @@ vmxnet3_dev_configure(struct rte_eth_dev *dev)
* on current socket
*/
mz = gpa_zone_reserve(dev, sizeof(struct Vmxnet3_DriverShared),
- "shared", rte_socket_id(), 8);
+ "shared", rte_socket_id(), 8, 1);
if (mz == NULL) {
PMD_INIT_LOG(ERR, "ERROR: Creating shared zone");
@@ -397,10 +405,14 @@ vmxnet3_dev_configure(struct rte_eth_dev *dev)
/*
* Allocate a memzone for Vmxnet3_RxQueueDesc - Vmxnet3_TxQueueDesc
- * on current socket
+ * on current socket.
+ *
+ * We cannot reuse this memzone from previous allocation as its size
+ * depends on the number of tx and rx queues, which could be different
+ * from one config to another.
*/
- mz = gpa_zone_reserve(dev, size, "queuedesc",
- rte_socket_id(), VMXNET3_QUEUE_DESC_ALIGN);
+ mz = gpa_zone_reserve(dev, size, "queuedesc", rte_socket_id(),
+ VMXNET3_QUEUE_DESC_ALIGN, 0);
if (mz == NULL) {
PMD_INIT_LOG(ERR, "ERROR: Creating queue descriptors zone");
return -ENOMEM;
@@ -415,8 +427,9 @@ vmxnet3_dev_configure(struct rte_eth_dev *dev)
if (dev->data->dev_conf.rxmode.mq_mode == ETH_MQ_RX_RSS) {
/* Allocate memory structure for UPT1_RSSConf and configure */
- mz = gpa_zone_reserve(dev, sizeof(struct VMXNET3_RSSConf),
"rss_conf",
- rte_socket_id(), RTE_CACHE_LINE_SIZE);
+ mz = gpa_zone_reserve(dev, sizeof(struct VMXNET3_RSSConf),
+ "rss_conf", rte_socket_id(),
+ RTE_CACHE_LINE_SIZE, 1);
if (mz == NULL) {
PMD_INIT_LOG(ERR,
"ERROR: Creating rss_conf structure zone");
--
1.9.1
