net/memif: fix abstract socket address length

This fixes using abstract sockets with memifs.
We were not passing the exact addr_len,
which requires zeroing the remaining sun_path
and doesn't appear well in other utilities (e.g. lsof -U)

Signed-off-by: Nathan Skrzypczak <nathan.skrzypczak@gmail.com>
Reviewed-by: Jakub Grajciar <jgrajcia@cisco.com>

diff --git a/drivers/net/memif/memif_socket.c b/drivers/net/memif/memif_socket.c
index 5b37373..f58ff4c 100644 (file)
--- a/drivers/net/memif/memif_socket.c
+++ b/drivers/net/memif/memif_socket.c
@@ -866,6 +866,7 @@ memif_socket_create(char *key, uint8_t listener, bool is_abstract)
 {
        struct memif_socket *sock;
        struct sockaddr_un un = { 0 };
+       uint32_t sunlen;
        int sockfd;
        int ret;
        int on = 1;
@@ -890,7 +891,11 @@ memif_socket_create(char *key, uint8_t listener, bool is_abstract)
                        /* abstract address */
                        un.sun_path[0] = '\0';
                        strlcpy(un.sun_path + 1, sock->filename, MEMIF_SOCKET_UN_SIZE - 1);
+                       sunlen = RTE_MIN(1 + strlen(sock->filename),
+                                        MEMIF_SOCKET_UN_SIZE) +
+                                sizeof(un) - sizeof(un.sun_path);
                } else {
+                       sunlen = sizeof(un);
                        strlcpy(un.sun_path, sock->filename, MEMIF_SOCKET_UN_SIZE);
                }
 
@@ -899,7 +904,7 @@ memif_socket_create(char *key, uint8_t listener, bool is_abstract)
                if (ret < 0)
                        goto error;
 
-               ret = bind(sockfd, (struct sockaddr *)&un, sizeof(un));
+               ret = bind(sockfd, (struct sockaddr *)&un, sunlen);
                if (ret < 0)
                        goto error;
 
@@ -1061,6 +1066,7 @@ memif_connect_client(struct rte_eth_dev *dev)
 {
        int sockfd;
        int ret;
+       uint32_t sunlen;
        struct sockaddr_un sun = { 0 };
        struct pmd_internals *pmd = dev->data->dev_private;
 
@@ -1075,16 +1081,19 @@ memif_connect_client(struct rte_eth_dev *dev)
        }
 
        sun.sun_family = AF_UNIX;
+       sunlen = sizeof(struct sockaddr_un);
        if (pmd->flags & ETH_MEMIF_FLAG_SOCKET_ABSTRACT) {
                /* abstract address */
                sun.sun_path[0] = '\0';
                strlcpy(sun.sun_path + 1,  pmd->socket_filename, MEMIF_SOCKET_UN_SIZE - 1);
+               sunlen = RTE_MIN(strlen(pmd->socket_filename) + 1,
+                                MEMIF_SOCKET_UN_SIZE) +
+                        sizeof(sun) - sizeof(sun.sun_path);
        } else {
                strlcpy(sun.sun_path,  pmd->socket_filename, MEMIF_SOCKET_UN_SIZE);
        }
 
-       ret = connect(sockfd, (struct sockaddr *)&sun,
-                     sizeof(struct sockaddr_un));
+       ret = connect(sockfd, (struct sockaddr *)&sun, sunlen);
        if (ret < 0) {
                MIF_LOG(ERR, "Failed to connect socket: %s.", pmd->socket_filename);
                goto error;