[PATCH] Signed-off-by: Ami Sabo <amis@radware.com>
From: Ami Sabo <hidden>
Date: 2017-02-23 08:53:17
Subsystem:
library code, networking drivers, the rest · Maintainers:
Andrew Morton, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
net/virtio-user: fix multi-process issue
Secondary process doesn't properly attach to the rte_eth_device
initialized by the primary process.
Accessing device from secondary process (e.g. via rte_eth_rx_burst),
causes process to crash. because rte_eth_dev_data is not properly set.
The issue was flood by
'commit 7f95f78a8aea ("ethdev: clear data when allocating device")'
which now clears rte_eth_dev_data entry.
So, most of the rte_eth_dev_data fields are not initialized.
For pci devices these fields are initialized by rte_eth_dev_pci_probe
->eth_dev_attach_secondary().
However, for virtio-user virtio_user_pmd_probe() is called instead of
rte_eth_dev_pci_probe().
To fix it: Allow non-pci drivers call to dev_attach_secondary() and
call it (for secondary process) from virtio_user_pmd_probe.
Signed-off-by: Ami Sabo <redacted>
---
drivers/net/virtio/virtio_user_ethdev.c | 29 +++++++++++++++++------------
lib/librte_ether/rte_ethdev.c | 6 +++---
lib/librte_ether/rte_ethdev.h | 11 +++++++++++
lib/librte_ether/rte_ether_version.map | 1 +
4 files changed, 32 insertions(+), 15 deletions(-)
diff --git a/drivers/net/virtio/virtio_user_ethdev.c b/drivers/net/virtio/virtio_user_ethdev.c
index e544acc..d388b92 100644
--- a/drivers/net/virtio/virtio_user_ethdev.c
+++ b/drivers/net/virtio/virtio_user_ethdev.c@@ -418,18 +418,23 @@ virtio_user_pmd_probe(const char *name, const char *params) goto end; } - eth_dev = virtio_user_eth_dev_alloc(name); - if (!eth_dev) { - PMD_INIT_LOG(ERR, "virtio_user fails to alloc device"); - goto end; - } - - hw = eth_dev->data->dev_private; - if (virtio_user_dev_init(hw->virtio_user_dev, path, queues, cq, - queue_size, mac_addr) < 0) { - PMD_INIT_LOG(ERR, "virtio_user_dev_init fails"); - virtio_user_eth_dev_free(eth_dev); - goto end; + if (rte_eal_process_type() == RTE_PROC_PRIMARY) { + eth_dev = virtio_user_eth_dev_alloc(name); + if (!eth_dev) { + PMD_INIT_LOG(ERR, "virtio_user fails to alloc device"); + goto end; + } + hw = eth_dev->data->dev_private; + if (virtio_user_dev_init(hw->virtio_user_dev, path, queues, cq, + queue_size, mac_addr) < 0) { + PMD_INIT_LOG(ERR, "virtio_user_dev_init fails"); + virtio_user_eth_dev_free(eth_dev); + goto end; + } + } else { + eth_dev = rte_eth_dev_attach_secondary(name); + if (!eth_dev) + goto end; } /* previously called by rte_eal_pci_probe() for physical dev */
diff --git a/lib/librte_ether/rte_ethdev.c b/lib/librte_ether/rte_ethdev.c
index 61f44e2..ea4f76c 100644
--- a/lib/librte_ether/rte_ethdev.c
+++ b/lib/librte_ether/rte_ethdev.c@@ -239,8 +239,8 @@ rte_eth_dev_allocate(const char *name) * makes sure that the same device would have the same port id both * in the primary and secondary process. */ -static struct rte_eth_dev * -eth_dev_attach_secondary(const char *name) +struct rte_eth_dev * +rte_eth_dev_attach_secondary(const char *name) { uint8_t i; struct rte_eth_dev *eth_dev;
@@ -302,7 +302,7 @@ rte_eth_dev_pci_probe(struct rte_pci_driver *pci_drv, if (eth_dev->data->dev_private == NULL) rte_panic("Cannot allocate memzone for private port data\n"); } else { - eth_dev = eth_dev_attach_secondary(ethdev_name); + eth_dev = rte_eth_dev_attach_secondary(ethdev_name); if (eth_dev == NULL) { /* * if we failed to attach a device, it means the
diff --git a/lib/librte_ether/rte_ethdev.h b/lib/librte_ether/rte_ethdev.h
index c17bbda..3281205 100644
--- a/lib/librte_ether/rte_ethdev.h
+++ b/lib/librte_ether/rte_ethdev.h@@ -1762,6 +1762,17 @@ struct rte_eth_dev *rte_eth_dev_allocate(const char *name); /** * @internal + * Attach to the ethdev already initialized by the primary + * process. + * + * @param name Ethernet device's name. + @return + * - Slot in the rte_dev_devices array for attached device; + */ +struct rte_eth_dev *rte_eth_dev_attach_secondary(const char *name); + +/** + * @internal * Release the specified ethdev port. * * @param eth_dev
diff --git a/lib/librte_ether/rte_ether_version.map b/lib/librte_ether/rte_ether_version.map
index c6c9d0d..f8bf2ee 100644
--- a/lib/librte_ether/rte_ether_version.map
+++ b/lib/librte_ether/rte_ether_version.map@@ -152,5 +152,6 @@ DPDK_17.02 { rte_flow_flush; rte_flow_query; rte_flow_validate; + rte_eth_dev_attach_secondary; } DPDK_16.11;
--
2.7.4