This allows a DPDK application running with root privilege to create a
memif socket listener with non-root owner uid and gid, which can be
connected from client applications running without root privilege.
Signed-off-by: Junxiao Shi <g...@mail1.yoursunny.com>
---
doc/guides/nics/memif.rst | 2 ++
drivers/net/memif/memif_socket.c | 13 +++++++--
drivers/net/memif/rte_eth_memif.c | 48 +++++++++++++++++++++++++++++--
drivers/net/memif/rte_eth_memif.h | 2 ++
4 files changed, 60 insertions(+), 5 deletions(-)
diff --git a/doc/guides/nics/memif.rst b/doc/guides/nics/memif.rst
index aca843640b..8a8141aa72 100644
--- a/doc/guides/nics/memif.rst
+++ b/doc/guides/nics/memif.rst
@@ -44,6 +44,8 @@ client.
"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"
+ "uid=1000", "Set socket listener owner uid. Only relevant to server with
socket-abstract=no", "unchanged", "uid_t"
+ "gid=1000", "Set socket listener owner gid. Only relevant to server with
socket-abstract=no", "unchanged", "gid_t"
"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 client mode. Only relevant to
client, 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 7886644412..c2b038d01a 100644
--- a/drivers/net/memif/memif_socket.c
+++ b/drivers/net/memif/memif_socket.c
@@ -889,7 +889,7 @@ memif_listener_handler(void *arg)
}
static struct memif_socket *
-memif_socket_create(char *key, uint8_t listener, bool is_abstract)
+memif_socket_create(char *key, uint8_t listener, bool is_abstract, uid_t
owner_uid, gid_t owner_gid)
{
struct memif_socket *sock;
struct sockaddr_un un = { 0 };
@@ -941,6 +941,14 @@ memif_socket_create(char *key, uint8_t listener, bool
is_abstract)
MIF_LOG(DEBUG, "Memif listener socket %s created.",
sock->filename);
+ if (!is_abstract && (owner_uid != (uid_t)-1 || owner_gid !=
(gid_t)-1)) {
+ ret = chown(sock->filename, owner_uid, owner_gid);
+ if (ret < 0) {
+ MIF_LOG(ERR, "Failed to change listener socket
owner %d", errno);
+ goto error;
+ }
+ }
+
/* Allocate interrupt instance */
sock->intr_handle =
rte_intr_instance_alloc(RTE_INTR_INSTANCE_F_SHARED);
@@ -1017,7 +1025,8 @@ memif_socket_init(struct rte_eth_dev *dev, const char
*socket_filename)
if (ret < 0) {
socket = memif_socket_create(key,
(pmd->role == MEMIF_ROLE_CLIENT) ? 0 : 1,
- pmd->flags & ETH_MEMIF_FLAG_SOCKET_ABSTRACT);
+ pmd->flags & ETH_MEMIF_FLAG_SOCKET_ABSTRACT,
+ pmd->owner_uid, pmd->owner_gid);
if (socket == NULL)
return -1;
ret = rte_hash_add_key_data(hash, key, socket);
diff --git a/drivers/net/memif/rte_eth_memif.c
b/drivers/net/memif/rte_eth_memif.c
index dd951b8296..092f1cbc92 100644
--- a/drivers/net/memif/rte_eth_memif.c
+++ b/drivers/net/memif/rte_eth_memif.c
@@ -37,6 +37,8 @@
#define ETH_MEMIF_RING_SIZE_ARG "rsize"
#define ETH_MEMIF_SOCKET_ARG "socket"
#define ETH_MEMIF_SOCKET_ABSTRACT_ARG "socket-abstract"
+#define ETH_MEMIF_OWNER_UID_ARG "owner-uid"
+#define ETH_MEMIF_OWNER_GID_ARG "owner-gid"
#define ETH_MEMIF_MAC_ARG "mac"
#define ETH_MEMIF_ZC_ARG "zero-copy"
#define ETH_MEMIF_SECRET_ARG "secret"
@@ -48,6 +50,8 @@ static const char * const valid_arguments[] = {
ETH_MEMIF_RING_SIZE_ARG,
ETH_MEMIF_SOCKET_ARG,
ETH_MEMIF_SOCKET_ABSTRACT_ARG,
+ ETH_MEMIF_OWNER_UID_ARG,
+ ETH_MEMIF_OWNER_GID_ARG,
ETH_MEMIF_MAC_ARG,
ETH_MEMIF_ZC_ARG,
ETH_MEMIF_SECRET_ARG,
@@ -1515,7 +1519,7 @@ static const struct eth_dev_ops ops = {
static int
memif_create(struct rte_vdev_device *vdev, enum memif_role_t role,
memif_interface_id_t id, uint32_t flags,
- const char *socket_filename,
+ const char *socket_filename, uid_t owner_uid, gid_t owner_gid,
memif_log2_ring_size_t log2_ring_size,
uint16_t pkt_buffer_size, const char *secret,
struct rte_ether_addr *ether_addr)
@@ -1554,6 +1558,8 @@ memif_create(struct rte_vdev_device *vdev, enum
memif_role_t role,
/* Zero-copy flag irelevant to server. */
if (pmd->role == MEMIF_ROLE_SERVER)
pmd->flags &= ~ETH_MEMIF_FLAG_ZERO_COPY;
+ pmd->owner_uid = owner_uid;
+ pmd->owner_gid = owner_gid;
ret = memif_socket_init(eth_dev, socket_filename);
if (ret < 0)
@@ -1740,6 +1746,30 @@ memif_set_is_socket_abstract(const char *key
__rte_unused, const char *value, vo
return 0;
}
+static int
+memif_set_owner(const char *key, const char *value, void *extra_args)
+{
+ RTE_ASSERT(sizeof(uid_t) == sizeof(uint32_t));
+ RTE_ASSERT(sizeof(gid_t) == sizeof(uint32_t));
+
+ unsigned long val;
+ char *end = NULL;
+ uint32_t *id = (uint32_t *)extra_args;
+
+ val = strtoul(value, &end, 10);
+ if (*value == '\0' || *end != '\0') {
+ MIF_LOG(ERR, "Failed to parse %s: %s.", key, value);
+ return -EINVAL;
+ }
+ if (val >= UINT32_MAX) {
+ MIF_LOG(ERR, "Invalid %s: %s.", key, value);
+ return -ERANGE;
+ }
+
+ *id = val;
+ return 0;
+}
+
static int
memif_set_mac(const char *key __rte_unused, const char *value, void
*extra_args)
{
@@ -1772,6 +1802,8 @@ rte_pmd_memif_probe(struct rte_vdev_device *vdev)
uint16_t pkt_buffer_size = ETH_MEMIF_DEFAULT_PKT_BUFFER_SIZE;
memif_log2_ring_size_t log2_ring_size = ETH_MEMIF_DEFAULT_RING_SIZE;
const char *socket_filename = ETH_MEMIF_DEFAULT_SOCKET_FILENAME;
+ uid_t owner_uid = -1;
+ gid_t owner_gid = -1;
uint32_t flags = 0;
const char *secret = NULL;
struct rte_ether_addr *ether_addr = rte_zmalloc("",
@@ -1855,6 +1887,14 @@ rte_pmd_memif_probe(struct rte_vdev_device *vdev)
&memif_set_is_socket_abstract, &flags);
if (ret < 0)
goto exit;
+ ret = rte_kvargs_process(kvlist, ETH_MEMIF_OWNER_UID_ARG,
+ &memif_set_owner, &owner_uid);
+ if (ret < 0)
+ goto exit;
+ ret = rte_kvargs_process(kvlist, ETH_MEMIF_OWNER_GID_ARG,
+ &memif_set_owner, &owner_gid);
+ if (ret < 0)
+ goto exit;
ret = rte_kvargs_process(kvlist, ETH_MEMIF_MAC_ARG,
&memif_set_mac, ether_addr);
if (ret < 0)
@@ -1876,7 +1916,7 @@ rte_pmd_memif_probe(struct rte_vdev_device *vdev)
}
/* create interface */
- ret = memif_create(vdev, role, id, flags, socket_filename,
+ ret = memif_create(vdev, role, id, flags, socket_filename, owner_uid,
owner_gid,
log2_ring_size, pkt_buffer_size, secret, ether_addr);
exit:
@@ -1909,7 +1949,9 @@ 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_SOCKET_ABSTRACT_ARG "=yes|no"
+ ETH_MEMIF_OWNER_UID_ARG "=<int>"
+ ETH_MEMIF_OWNER_GID_ARG "=<int>"
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 81e7dceae0..b43895a55f 100644
--- a/drivers/net/memif/rte_eth_memif.h
+++ b/drivers/net/memif/rte_eth_memif.h
@@ -89,6 +89,8 @@ struct pmd_internals {
/**< use abstract socket address */
char *socket_filename; /**< pointer to socket filename
*/
+ uid_t owner_uid; /**< socket owner uid */
+ gid_t owner_gid; /**< socket owner gid */
char secret[ETH_MEMIF_SECRET_SIZE]; /**< secret (optional security
parameter) */
struct memif_control_channel *cc; /**< control channel */
--
2.17.1
