[dpdk-dev] [PATCH 2/2] Revert "net/mlx5: fix master device Netlink socket sharing"

[Viacheslav Ovsiienko <viacheslavo@mellanox.com>]

This reverts commit e28111ac9864af09e826241a915dfff87a9c00ad.
The netlink requests are replaced by ifindex caching and
not needed anymore.

Signed-off-by: Viacheslav Ovsiienko <viacheslavo@mellanox.com>
Fixes: e28111ac9864 ("net/mlx5: fix master device Netlink socket sharing")
---
 drivers/net/mlx5/mlx5.h        |   6 ---
 drivers/net/mlx5/mlx5_ethdev.c | 109 ++---------------------------------------
 2 files changed, 3 insertions(+), 112 deletions(-)

diff --git a/drivers/net/mlx5/mlx5.h b/drivers/net/mlx5/mlx5.h
index 4ae6738..b150107 100644
--- a/drivers/net/mlx5/mlx5.h
+++ b/drivers/net/mlx5/mlx5.h
@@ -518,15 +518,9 @@ struct mlx5_priv {
 /* mlx5_ethdev.c */
 
 int mlx5_get_ifname(const struct rte_eth_dev *dev, char (*ifname)[IF_NAMESIZE]);
-int mlx5_get_ifname_base(const struct rte_eth_dev *base,
-			 const struct rte_eth_dev *dev,
-			 char (*ifname)[IF_NAMESIZE]);
 int mlx5_get_master_ifname(const char *ibdev_path, char (*ifname)[IF_NAMESIZE]);
 unsigned int mlx5_ifindex(const struct rte_eth_dev *dev);
 int mlx5_ifreq(const struct rte_eth_dev *dev, int req, struct ifreq *ifr);
-int mlx5_ifreq_base(const struct rte_eth_dev *base,
-		    const struct rte_eth_dev *dev,
-		    int req, struct ifreq *ifr);
 int mlx5_get_mtu(struct rte_eth_dev *dev, uint16_t *mtu);
 int mlx5_set_flags(struct rte_eth_dev *dev, unsigned int keep,
 		   unsigned int flags);
diff --git a/drivers/net/mlx5/mlx5_ethdev.c b/drivers/net/mlx5/mlx5_ethdev.c
index 3803be3..e418676 100644
--- a/drivers/net/mlx5/mlx5_ethdev.c
+++ b/drivers/net/mlx5/mlx5_ethdev.c
@@ -240,51 +240,6 @@ struct ethtool_link_settings {
 }
 
 /**
- * Get interface name for the specified device, uses the extra base
- * device resources to perform Netlink requests.
- *
- * This is a port representor-aware version of mlx5_get_master_ifname().
- *
- * @param[in] base
- *   Pointer to Ethernet device to use Netlink socket from
- *   to perfrom requests.
- * @param[in] dev
- *   Pointer to Ethernet device.
- * @param[out] ifname
- *   Interface name output buffer.
- *
- * @return
- *   0 on success, a negative errno value otherwise and rte_errno is set.
- */
-int
-mlx5_get_ifname_base(const struct rte_eth_dev *base,
-		     const struct rte_eth_dev *dev,
-		     char (*ifname)[IF_NAMESIZE])
-{
-	struct mlx5_priv *priv = dev->data->dev_private;
-	struct mlx5_priv *priv_base = base->data->dev_private;
-	unsigned int ifindex;
-
-	assert(priv);
-	assert(priv->sh);
-	assert(priv_base);
-	ifindex = priv_base->nl_socket_rdma >= 0 ?
-		  mlx5_nl_ifindex(priv_base->nl_socket_rdma,
-				  priv->sh->ibdev_name,
-				  priv->ibv_port) : 0;
-	if (!ifindex) {
-		if (!priv->representor)
-			return mlx5_get_master_ifname(priv->sh->ibdev_path,
-						      ifname);
-		rte_errno = ENXIO;
-		return -rte_errno;
-	}
-	if (if_indextoname(ifindex, &(*ifname)[0]))
-		return 0;
-	rte_errno = errno;
-	return -rte_errno;
-}
-/**
  * Get the interface index from device name.
  *
  * @param[in] dev
@@ -346,51 +301,6 @@ struct ethtool_link_settings {
 }
 
 /**
- * Perform ifreq ioctl() on specified Ethernet device,
- * ifindex, name and other attributes are requested
- * on the base device to avoid specified device Netlink
- * socket sharing (this is not thread-safe).
- *
- * @param[in] base
- *   Pointer to Ethernet device to get dev attributes.
- * @param[in] dev
- *   Pointer to Ethernet device to perform ioctl.
- * @param req
- *   Request number to pass to ioctl().
- * @param[out] ifr
- *   Interface request structure output buffer.
- *
- * @return
- *   0 on success, a negative errno value otherwise and rte_errno is set.
- */
-int
-mlx5_ifreq_base(const struct rte_eth_dev *base,
-		const struct rte_eth_dev *dev,
-		int req, struct ifreq *ifr)
-{
-	int sock = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP);
-	int ret = 0;
-
-	if (sock == -1) {
-		rte_errno = errno;
-		return -rte_errno;
-	}
-	ret = mlx5_get_ifname_base(base, dev, &ifr->ifr_name);
-	if (ret)
-		goto error;
-	ret = ioctl(sock, req, ifr);
-	if (ret == -1) {
-		rte_errno = errno;
-		goto error;
-	}
-	close(sock);
-	return 0;
-error:
-	close(sock);
-	return -rte_errno;
-}
-
-/**
  * Get device MTU.
  *
  * @param dev
@@ -872,15 +782,7 @@ int mlx5_fw_version_get(struct rte_eth_dev *dev, char *fw_ver, size_t fw_size)
 				ifr = (struct ifreq) {
 					.ifr_data = (void *)&edata,
 				};
-				/*
-				 * Use special version of mlx5_ifreq()
-				 * to get master device name with local
-				 * device Netlink socket. Using master
-				 * device Netlink socket is not thread
-				 * safe.
-				 */
-				ret = mlx5_ifreq_base(dev, master,
-						      SIOCETHTOOL, &ifr);
+				ret = mlx5_ifreq(master, SIOCETHTOOL, &ifr);
 			}
 		}
 		if (ret) {
@@ -977,12 +879,7 @@ int mlx5_fw_version_get(struct rte_eth_dev *dev, char *fw_ver, size_t fw_size)
 				ifr = (struct ifreq) {
 					.ifr_data = (void *)&gcmd,
 				};
-				/*
-				 * Avoid using master Netlink socket.
-				 * This is not thread-safe.
-				 */
-				ret = mlx5_ifreq_base(dev, master,
-						      SIOCETHTOOL, &ifr);
+				ret = mlx5_ifreq(master, SIOCETHTOOL, &ifr);
 			}
 		}
 		if (ret) {
@@ -1003,7 +900,7 @@ int mlx5_fw_version_get(struct rte_eth_dev *dev, char *fw_ver, size_t fw_size)
 
 	*ecmd = gcmd;
 	ifr.ifr_data = (void *)ecmd;
-	ret = mlx5_ifreq_base(dev, master ? master : dev, SIOCETHTOOL, &ifr);
+	ret = mlx5_ifreq(master ? master : dev, SIOCETHTOOL, &ifr);
 	if (ret) {
 		DRV_LOG(DEBUG,
 			"port %u ioctl(SIOCETHTOOL,"
-- 
1.8.3.1