[dpdk-dev,2/2] examples/vhost: support multiple socket files
Commit Message
When examples/vhost runs in client mode, only one QEMU can be connected.
This is because that examples/vhost just supports one socket file. This
patch is to add multiple sockets support for examples/vhost.
Signed-off-by: Jiayu Hu <jiayu.hu@intel.com>
---
examples/vhost/main.c | 50 ++++++++++++++++++++++++++++++++++++++------------
1 file changed, 38 insertions(+), 12 deletions(-)
Comments
On Tue, Aug 16, 2016 at 12:14:39PM -0400, Jiayu Hu wrote:
> +/*
> + * This function is used to unregister drivers.
> + */
> +static void
> +unregister_drivers(int socket_num)
> +{
Redundant comment. The function name already explains it well.
> /* Register vhost user driver to handle vhost messages. */
> - ret = rte_vhost_driver_register(socket_file, flags);
> - if (ret != 0)
> - rte_exit(EXIT_FAILURE, "vhost driver register failure.\n");
> + for (i = 0; i < nb_sockets; i++) {
> + ret = rte_vhost_driver_register
> + (socket_files + i * PATH_MAX, flags);
> + if (ret != 0) {
> + unregister_drivers(i);
> + rte_exit(EXIT_FAILURE, "vhost driver register failure.\n");
Lines over 80 chars.
Besides, please cc corresponding maintainers while sending patches, say
cc me for virtio/vhost changes. From MAINTAINERS you could find the
names.
So, please make a v2, with above 2 minor fixed. And also, please follow
the guide on http://dpdk.org/dev to send v2:
If a previous version of the patch has already been sent, a version
number and changelog annotations are helpful:
git send-email -1 -v2 --annotate --in-reply-to <Message-ID of the previous patch>
--to dev@dpdk.org --cc <everybody discussing the patch>
--yliu
On 08/16/2016 06:14 PM, Jiayu Hu wrote:
> When examples/vhost runs in client mode, only one QEMU can be connected.
> This is because that examples/vhost just supports one socket file. This
> patch is to add multiple sockets support for examples/vhost.
>
> Signed-off-by: Jiayu Hu <jiayu.hu@intel.com>
> ---
> examples/vhost/main.c | 50 ++++++++++++++++++++++++++++++++++++++------------
> 1 file changed, 38 insertions(+), 12 deletions(-)
>
> diff --git a/examples/vhost/main.c b/examples/vhost/main.c
> index a718577..9974f0b 100644
> --- a/examples/vhost/main.c
> +++ b/examples/vhost/main.c
> @@ -136,8 +136,9 @@ static uint32_t burst_rx_delay_time = BURST_RX_WAIT_US;
> /* Specify the number of retries on RX. */
> static uint32_t burst_rx_retry_num = BURST_RX_RETRIES;
>
> -/* Socket file path. Can be set by user */
> -static char socket_file[PATH_MAX] = "vhost-net";
Default name being removed, you can drop my comment on patch 1. :)
> +/* Socket file paths. Can be set by user */
> +static char *socket_files;
> +int nb_sockets;
Any reason not to make it static?
> /* empty vmdq configuration structure. Filled in programatically */
> static struct rte_eth_conf vmdq_conf_default = {
> @@ -395,11 +396,12 @@ static int
> us_vhost_parse_socket_path(const char *q_arg)
> {
> /* parse number string */
> -
> if (strnlen(q_arg, PATH_MAX) > PATH_MAX)
> return -1;
> - else
> - snprintf((char *)&socket_file, PATH_MAX, "%s", q_arg);
> +
> + socket_files = realloc(socket_files, PATH_MAX * (nb_sockets + 1));
> + snprintf(socket_files + nb_sockets * PATH_MAX, PATH_MAX, "%s", q_arg);
> + nb_sockets++;
>
> return 0;
> }
> @@ -1341,14 +1343,30 @@ print_stats(void)
> }
> }
>
> +/*
> + * This function is used to unregister drivers.
> + */
> +static void
> +unregister_drivers(int socket_num)
> +{
> + int i, ret;
> +
> + for (i = 0; i < socket_num; i++) {
> + ret = rte_vhost_driver_unregister(socket_files + i * PATH_MAX);
> + if (ret != 0)
> + RTE_LOG(ERR, VHOST_CONFIG,
> + "Fail to unregister vhost driver for %s.\n",
> + socket_files + i * PATH_MAX);
> + }
> +}
> +
> /* When we receive a INT signal, unregister vhost driver */
> static void
> sigint_handler(__rte_unused int signum)
> {
> /* Unregister vhost driver. */
> - int ret = rte_vhost_driver_unregister((char *)&socket_file);
> - if (ret != 0)
> - rte_exit(EXIT_FAILURE, "vhost driver unregister failure.\n");
> + unregister_drivers(nb_sockets);
> +
> exit(0);
> }
>
> @@ -1412,12 +1430,15 @@ main(int argc, char *argv[])
> {
> unsigned lcore_id, core_id = 0;
> unsigned nb_ports, valid_num_ports;
> - int ret;
> + int ret, i;
> uint8_t portid;
> static pthread_t tid;
> char thread_name[RTE_MAX_THREAD_NAME_LEN];
> uint64_t flags = 0;
>
> + nb_sockets = 0;
> + socket_files = NULL;
Since socket_files is static, no need to initialize it to NULL.
If you staticize nb_sockets, same remark will apply.
On Thu, Aug 18, 2016 at 10:27:55AM +0200, Maxime Coquelin wrote:
>
>
> On 08/16/2016 06:14 PM, Jiayu Hu wrote:
> >When examples/vhost runs in client mode, only one QEMU can be connected.
> >This is because that examples/vhost just supports one socket file. This
> >patch is to add multiple sockets support for examples/vhost.
> >
> >Signed-off-by: Jiayu Hu <jiayu.hu@intel.com>
> >---
> > examples/vhost/main.c | 50 ++++++++++++++++++++++++++++++++++++++------------
> > 1 file changed, 38 insertions(+), 12 deletions(-)
> >
> >diff --git a/examples/vhost/main.c b/examples/vhost/main.c
> >index a718577..9974f0b 100644
> >--- a/examples/vhost/main.c
> >+++ b/examples/vhost/main.c
> >@@ -136,8 +136,9 @@ static uint32_t burst_rx_delay_time = BURST_RX_WAIT_US;
> > /* Specify the number of retries on RX. */
> > static uint32_t burst_rx_retry_num = BURST_RX_RETRIES;
> >
> >-/* Socket file path. Can be set by user */
> >-static char socket_file[PATH_MAX] = "vhost-net";
> Default name being removed, you can drop my comment on patch 1. :)
>
> >+/* Socket file paths. Can be set by user */
> >+static char *socket_files;
> >+int nb_sockets;
> Any reason not to make it static?
Right, it should be "static". Hmm, I missed it in review :(
--yliu
@@ -136,8 +136,9 @@ static uint32_t burst_rx_delay_time = BURST_RX_WAIT_US;
/* Specify the number of retries on RX. */
static uint32_t burst_rx_retry_num = BURST_RX_RETRIES;
-/* Socket file path. Can be set by user */
-static char socket_file[PATH_MAX] = "vhost-net";
+/* Socket file paths. Can be set by user */
+static char *socket_files;
+int nb_sockets;
/* empty vmdq configuration structure. Filled in programatically */
static struct rte_eth_conf vmdq_conf_default = {
@@ -395,11 +396,12 @@ static int
us_vhost_parse_socket_path(const char *q_arg)
{
/* parse number string */
-
if (strnlen(q_arg, PATH_MAX) > PATH_MAX)
return -1;
- else
- snprintf((char *)&socket_file, PATH_MAX, "%s", q_arg);
+
+ socket_files = realloc(socket_files, PATH_MAX * (nb_sockets + 1));
+ snprintf(socket_files + nb_sockets * PATH_MAX, PATH_MAX, "%s", q_arg);
+ nb_sockets++;
return 0;
}
@@ -1341,14 +1343,30 @@ print_stats(void)
}
}
+/*
+ * This function is used to unregister drivers.
+ */
+static void
+unregister_drivers(int socket_num)
+{
+ int i, ret;
+
+ for (i = 0; i < socket_num; i++) {
+ ret = rte_vhost_driver_unregister(socket_files + i * PATH_MAX);
+ if (ret != 0)
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "Fail to unregister vhost driver for %s.\n",
+ socket_files + i * PATH_MAX);
+ }
+}
+
/* When we receive a INT signal, unregister vhost driver */
static void
sigint_handler(__rte_unused int signum)
{
/* Unregister vhost driver. */
- int ret = rte_vhost_driver_unregister((char *)&socket_file);
- if (ret != 0)
- rte_exit(EXIT_FAILURE, "vhost driver unregister failure.\n");
+ unregister_drivers(nb_sockets);
+
exit(0);
}
@@ -1412,12 +1430,15 @@ main(int argc, char *argv[])
{
unsigned lcore_id, core_id = 0;
unsigned nb_ports, valid_num_ports;
- int ret;
+ int ret, i;
uint8_t portid;
static pthread_t tid;
char thread_name[RTE_MAX_THREAD_NAME_LEN];
uint64_t flags = 0;
+ nb_sockets = 0;
+ socket_files = NULL;
+
signal(SIGINT, sigint_handler);
/* init EAL */
@@ -1511,9 +1532,14 @@ main(int argc, char *argv[])
flags |= RTE_VHOST_USER_CLIENT;
/* Register vhost user driver to handle vhost messages. */
- ret = rte_vhost_driver_register(socket_file, flags);
- if (ret != 0)
- rte_exit(EXIT_FAILURE, "vhost driver register failure.\n");
+ for (i = 0; i < nb_sockets; i++) {
+ ret = rte_vhost_driver_register
+ (socket_files + i * PATH_MAX, flags);
+ if (ret != 0) {
+ unregister_drivers(i);
+ rte_exit(EXIT_FAILURE, "vhost driver register failure.\n");
+ }
+ }
rte_vhost_driver_callback_register(&virtio_net_device_ops);