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From: Jakub Grajciar <jgrajcia@cisco.com>
To: <dev@dpdk.org>
Cc: Jakub Grajciar <jgrajcia@cisco.com>
Subject: [dpdk-dev] [PATCH] net/memif: use abstract socket address
Date: Mon, 5 Oct 2020 14:39:00 +0200
Message-ID: <20201005123900.32723-1-jgrajcia@cisco.com> (raw)

Abstract socket address has no connection with
filesystem pathnames and the socket dissapears
once all open references are closed.

Memif pmd will use abstract socket address by default.
For backwards compatibility use new argument
'socket-abstract=no'

Signed-off-by: Jakub Grajciar <jgrajcia@cisco.com>
---
 doc/guides/nics/memif.rst         |  1 +
 drivers/net/memif/memif_socket.c  | 25 +++++++++++++++--------
 drivers/net/memif/rte_eth_memif.c | 34 ++++++++++++++++++++++++++++++-
 drivers/net/memif/rte_eth_memif.h | 10 +++++----
 4 files changed, 57 insertions(+), 13 deletions(-)

diff --git a/doc/guides/nics/memif.rst b/doc/guides/nics/memif.rst
index ddeebed25..8e80105a4 100644
--- a/doc/guides/nics/memif.rst
+++ b/doc/guides/nics/memif.rst
@@ -43,6 +43,7 @@ client.
    "bsize=1024", "Size of single packet buffer", "2048", "uint16_t"
    "rsize=11", "Log2 of ring size. If rsize is 10, actual ring size is 1024", "10", "1-14"
    "socket=/tmp/memif.sock", "Socket filename", "/tmp/memif.sock", "string len 108"
+   "socket-abstract=no", "Set usage of abstract socket address", "yes", "yes|no"
    "mac=01:23:45:ab:cd:ef", "Mac address", "01:ab:23:cd:45:ef", ""
    "secret=abc123", "Secret is an optional security option, which if specified, must be matched by peer", "", "string len 24"
    "zero-copy=yes", "Enable/disable zero-copy slave mode. Only relevant to slave, requires '--single-file-segments' eal argument", "no", "yes|no"
diff --git a/drivers/net/memif/memif_socket.c b/drivers/net/memif/memif_socket.c
index 67794cb6f..4b0b12ead 100644
--- a/drivers/net/memif/memif_socket.c
+++ b/drivers/net/memif/memif_socket.c
@@ -862,10 +862,10 @@ memif_listener_handler(void *arg)
 }
 
 static struct memif_socket *
-memif_socket_create(char *key, uint8_t listener)
+memif_socket_create(char *key, uint8_t listener, bool is_abstract)
 {
 	struct memif_socket *sock;
-	struct sockaddr_un un;
+	struct sockaddr_un un = { 0 };
 	int sockfd;
 	int ret;
 	int on = 1;
@@ -886,7 +886,12 @@ memif_socket_create(char *key, uint8_t listener)
 			goto error;
 
 		un.sun_family = AF_UNIX;
-		strlcpy(un.sun_path, sock->filename, MEMIF_SOCKET_UN_SIZE);
+		if (is_abstract) {
+			// abstract address
+			un.sun_path[0] = '\0';
+			strlcpy(un.sun_path + 1, sock->filename, MEMIF_SOCKET_UN_SIZE - 1);
+		} else
+			strlcpy(un.sun_path, sock->filename, MEMIF_SOCKET_UN_SIZE);
 
 		ret = setsockopt(sockfd, SOL_SOCKET, SO_PASSCRED, &on,
 				 sizeof(on));
@@ -963,7 +968,7 @@ memif_socket_init(struct rte_eth_dev *dev, const char *socket_filename)
 	ret = rte_hash_lookup_data(hash, key, (void **)&socket);
 	if (ret < 0) {
 		socket = memif_socket_create(key,
-					     (pmd->role == MEMIF_ROLE_SLAVE) ? 0 : 1);
+					     (pmd->role == MEMIF_ROLE_SLAVE) ? 0 : 1, pmd->flags & ETH_MEMIF_FLAG_SOCKET_ABSTRACT);
 		if (socket == NULL)
 			return -1;
 		ret = rte_hash_add_key_data(hash, key, socket);
@@ -1025,7 +1030,7 @@ memif_socket_remove_device(struct rte_eth_dev *dev)
 	/* remove socket, if this was the last device using it */
 	if (TAILQ_EMPTY(&socket->dev_queue)) {
 		rte_hash_del_key(hash, socket->filename);
-		if (socket->listener) {
+		if (socket->listener && !(pmd->flags & ETH_MEMIF_FLAG_SOCKET_ABSTRACT)) {
 			/* remove listener socket file,
 			 * so we can create new one later.
 			 */
@@ -1054,7 +1059,7 @@ memif_connect_slave(struct rte_eth_dev *dev)
 {
 	int sockfd;
 	int ret;
-	struct sockaddr_un sun;
+	struct sockaddr_un sun = { 0 };
 	struct pmd_internals *pmd = dev->data->dev_private;
 
 	memset(pmd->local_disc_string, 0, ETH_MEMIF_DISC_STRING_SIZE);
@@ -1068,8 +1073,12 @@ memif_connect_slave(struct rte_eth_dev *dev)
 	}
 
 	sun.sun_family = AF_UNIX;
-
-	memcpy(sun.sun_path, pmd->socket_filename, sizeof(sun.sun_path) - 1);
+	if (pmd->flags & ETH_MEMIF_FLAG_SOCKET_ABSTRACT) {
+		// abstract address
+		sun.sun_path[0] = '\0';
+		memcpy(sun.sun_path + 1, pmd->socket_filename, sizeof(sun.sun_path) - 2);
+	} else
+		memcpy(sun.sun_path, pmd->socket_filename, sizeof(sun.sun_path) - 1);
 
 	ret = connect(sockfd, (struct sockaddr *)&sun,
 		      sizeof(struct sockaddr_un));
diff --git a/drivers/net/memif/rte_eth_memif.c b/drivers/net/memif/rte_eth_memif.c
index c1c7e9f8d..ba285be54 100644
--- a/drivers/net/memif/rte_eth_memif.c
+++ b/drivers/net/memif/rte_eth_memif.c
@@ -36,6 +36,7 @@
 #define ETH_MEMIF_PKT_BUFFER_SIZE_ARG	"bsize"
 #define ETH_MEMIF_RING_SIZE_ARG		"rsize"
 #define ETH_MEMIF_SOCKET_ARG		"socket"
+#define ETH_MEMIF_SOCKET_ABSTRACT_ARG	"socket-abstract"
 #define ETH_MEMIF_MAC_ARG		"mac"
 #define ETH_MEMIF_ZC_ARG		"zero-copy"
 #define ETH_MEMIF_SECRET_ARG		"secret"
@@ -46,6 +47,7 @@ static const char * const valid_arguments[] = {
 	ETH_MEMIF_PKT_BUFFER_SIZE_ARG,
 	ETH_MEMIF_RING_SIZE_ARG,
 	ETH_MEMIF_SOCKET_ARG,
+	ETH_MEMIF_SOCKET_ABSTRACT_ARG,
 	ETH_MEMIF_MAC_ARG,
 	ETH_MEMIF_ZC_ARG,
 	ETH_MEMIF_SECRET_ARG,
@@ -1640,7 +1642,23 @@ memif_set_socket_filename(const char *key __rte_unused, const char *value,
 	const char **socket_filename = (const char **)extra_args;
 
 	*socket_filename = value;
-	return memif_check_socket_filename(*socket_filename);
+	return 0;
+}
+
+static int
+memif_set_is_socket_abstract(const char *key __rte_unused, const char *value, void *extra_args)
+{
+	uint32_t *flags = (uint32_t *)extra_args;
+
+	if (strstr(value, "yes") != NULL) {
+		*flags |= ETH_MEMIF_FLAG_SOCKET_ABSTRACT;
+	} else if (strstr(value, "no") != NULL) {
+		*flags &= ~ETH_MEMIF_FLAG_SOCKET_ABSTRACT;
+	} else {
+		MIF_LOG(ERR, "Failed to parse socket-abstract param: %s.", value);
+		return -EINVAL;
+	}
+	return 0;
 }
 
 static int
@@ -1726,6 +1744,9 @@ rte_pmd_memif_probe(struct rte_vdev_device *vdev)
 		MIF_LOG(WARNING, "Failed to register mp action callback: %s",
 			strerror(rte_errno));
 
+	// use abstract address by default
+	flags |= ETH_MEMIF_FLAG_SOCKET_ABSTRACT;
+
 	kvlist = rte_kvargs_parse(rte_vdev_device_args(vdev), valid_arguments);
 
 	/* parse parameters */
@@ -1751,6 +1772,10 @@ rte_pmd_memif_probe(struct rte_vdev_device *vdev)
 					 (void *)(&socket_filename));
 		if (ret < 0)
 			goto exit;
+		ret = rte_kvargs_process(kvlist, ETH_MEMIF_SOCKET_ABSTRACT_ARG,
+					 &memif_set_is_socket_abstract, &flags);
+		if (ret < 0)
+			goto exit;
 		ret = rte_kvargs_process(kvlist, ETH_MEMIF_MAC_ARG,
 					 &memif_set_mac, ether_addr);
 		if (ret < 0)
@@ -1765,6 +1790,12 @@ rte_pmd_memif_probe(struct rte_vdev_device *vdev)
 			goto exit;
 	}
 
+	if (!(flags & ETH_MEMIF_FLAG_SOCKET_ABSTRACT)) {
+		ret = memif_check_socket_filename(socket_filename);
+		if (ret < 0)	
+			goto exit;
+	}
+
 	/* create interface */
 	ret = memif_create(vdev, role, id, flags, socket_filename,
 			   log2_ring_size, pkt_buffer_size, secret, ether_addr);
@@ -1802,6 +1833,7 @@ RTE_PMD_REGISTER_PARAM_STRING(net_memif,
 			      ETH_MEMIF_PKT_BUFFER_SIZE_ARG "=<int>"
 			      ETH_MEMIF_RING_SIZE_ARG "=<int>"
 			      ETH_MEMIF_SOCKET_ARG "=<string>"
+				  ETH_MEMIF_SOCKET_ABSTRACT_ARG "=yes|no"
 			      ETH_MEMIF_MAC_ARG "=xx:xx:xx:xx:xx:xx"
 			      ETH_MEMIF_ZC_ARG "=yes|no"
 			      ETH_MEMIF_SECRET_ARG "=<string>");
diff --git a/drivers/net/memif/rte_eth_memif.h b/drivers/net/memif/rte_eth_memif.h
index 6f45b7072..ac0a2f2d1 100644
--- a/drivers/net/memif/rte_eth_memif.h
+++ b/drivers/net/memif/rte_eth_memif.h
@@ -81,14 +81,16 @@ struct pmd_internals {
 	memif_interface_id_t id;		/**< unique id */
 	enum memif_role_t role;			/**< device role */
 	uint32_t flags;				/**< device status flags */
-#define ETH_MEMIF_FLAG_CONNECTING	(1 << 0)
+#define ETH_MEMIF_FLAG_CONNECTING		(1 << 0)
 /**< device is connecting */
-#define ETH_MEMIF_FLAG_CONNECTED	(1 << 1)
+#define ETH_MEMIF_FLAG_CONNECTED		(1 << 1)
 /**< device is connected */
-#define ETH_MEMIF_FLAG_ZERO_COPY	(1 << 2)
+#define ETH_MEMIF_FLAG_ZERO_COPY		(1 << 2)
 /**< device is zero-copy enabled */
-#define ETH_MEMIF_FLAG_DISABLED		(1 << 3)
+#define ETH_MEMIF_FLAG_DISABLED			(1 << 3)
 /**< device has not been configured and can not accept connection requests */
+#define ETH_MEMIF_FLAG_SOCKET_ABSTRACT	(1 << 4)
+/**< use abstract socket address */
 
 	char *socket_filename;			/**< pointer to socket filename */
 	char secret[ETH_MEMIF_SECRET_SIZE]; /**< secret (optional security parameter) */
-- 
2.17.1


             reply	other threads:[~2020-10-05 12:39 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-05 12:39 Jakub Grajciar [this message]
2020-10-05 13:09 ` Ferruh Yigit
2020-10-05 15:23   ` Jakub Grajciar -X (jgrajcia - PANTHEON TECH SRO at Cisco)
2020-10-05 18:17   ` Stephen Hemminger
2020-10-06  8:59     ` Ferruh Yigit
2020-10-07 10:00 ` [dpdk-dev] [PATCH v2] " Jakub Grajciar
2020-10-09 16:58   ` [dpdk-dev] [PATCH v3] " Jakub Grajciar
2020-10-09 17:17     ` Ferruh Yigit
2020-10-12  8:28     ` [dpdk-dev] [PATCH v4] " Jakub Grajciar
2020-10-12 14:57       ` Ferruh Yigit
2020-10-12 15:17       ` Stephen Hemminger
2020-10-07 15:03 ` [dpdk-dev] [PATCH] " Stephen Hemminger
2020-10-09 15:09   ` Ferruh Yigit

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