net/bonding: fix PCI address comparison on non-PCI ports

[ upstream commit 3b37cc0 ]

The bonding PMD will iterate over all available ETH ports and for each,
compare a chunk of bytes at an offset that would correspond to the PCI
address in an rte_pci_device.

This is incorrect and unsafe. Also, the rte_device using this PCI
address is already found, no need to compare again the PCI address of
all eth devices.

Refactoring the code to fix this, the initial check to find the PCI bus
is out of scope.

Fixes: c848b51 ("net/bonding: support bifurcated driver in eal")

Signed-off-by: Gaetan Rivet <grive@u256.net>
Acked-by: Min Hu (Connor) <humin29@huawei.com>

drivers/net/bonding/rte_eth_bond_args.c

@@ -22,23 +22,37 @@ const char *pmd_bond_init_valid_arguments[] = {
 	NULL
 };
 
+static inline int
+bond_pci_addr_cmp(const struct rte_device *dev, const void *_pci_addr)
+{
+	const struct rte_pci_device *pdev = RTE_DEV_TO_PCI_CONST(dev);
+	const struct rte_pci_addr *paddr = _pci_addr;
+
+	return rte_pci_addr_cmp(&pdev->addr, paddr);
+}
+
 static inline int
 find_port_id_by_pci_addr(const struct rte_pci_addr *pci_addr)
 {
-	struct rte_pci_device *pci_dev;
-	struct rte_pci_addr *eth_pci_addr;
+	struct rte_bus *pci_bus;
+	struct rte_device *dev;
 	unsigned i;
 
-	RTE_ETH_FOREACH_DEV(i) {
-		pci_dev = RTE_ETH_DEV_TO_PCI(&rte_eth_devices[i]);
-		eth_pci_addr = &pci_dev->addr;
+	pci_bus = rte_bus_find_by_name("pci");
+	if (pci_bus == NULL) {
+		RTE_BOND_LOG(ERR, "No PCI bus found");
+		return -1;
+	}
 
-		if (pci_addr->bus == eth_pci_addr->bus &&
-			pci_addr->devid == eth_pci_addr->devid &&
-			pci_addr->domain == eth_pci_addr->domain &&
-			pci_addr->function == eth_pci_addr->function)
-			return i;
+	dev = pci_bus->find_device(NULL, bond_pci_addr_cmp, pci_addr);
+	if (dev == NULL) {
+		RTE_BOND_LOG(ERR, "unable to find PCI device");
+		return -1;
 	}
+
+	RTE_ETH_FOREACH_DEV(i)
+		if (rte_eth_devices[i].device == dev)
+			return i;
 	return -1;
 }
 
@@ -57,15 +71,6 @@ find_port_id_by_dev_name(const char *name)
 	return -1;
 }
 
-static inline int
-bond_pci_addr_cmp(const struct rte_device *dev, const void *_pci_addr)
-{
-	const struct rte_pci_device *pdev = RTE_DEV_TO_PCI_CONST(dev);
-	const struct rte_pci_addr *paddr = _pci_addr;
-
-	return rte_pci_addr_cmp(&pdev->addr, paddr);
-}
-
 /**
  * Parses a port identifier string to a port id by pci address, then by name,
  * and finally port id.
@@ -74,23 +79,10 @@ static inline int
 parse_port_id(const char *port_str)
 {
 	struct rte_pci_addr dev_addr;
-	struct rte_bus *pci_bus;
-	struct rte_device *dev;
 	int port_id;
 
-	pci_bus = rte_bus_find_by_name("pci");
-	if (pci_bus == NULL) {
-		RTE_BOND_LOG(ERR, "unable to find PCI bus\n");
-		return -1;
-	}
-
 	/* try parsing as pci address, physical devices */
-	if (pci_bus->parse(port_str, &dev_addr) == 0) {
-		dev = pci_bus->find_device(NULL, bond_pci_addr_cmp, &dev_addr);
-		if (dev == NULL) {
-			RTE_BOND_LOG(ERR, "unable to find PCI device");
-			return -1;
-		}
+	if (rte_pci_addr_parse(port_str, &dev_addr) == 0) {
 		port_id = find_port_id_by_pci_addr(&dev_addr);
 		if (port_id < 0)
 			return -1;