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ptp4l: Add configuration option for socket priority 

Users may need to use different socket priorities for ptp4l traffic for
the purpose of traffic shaping. An example is to route ptp4l traffic
through a specific Linux egress queue using the mqprio qdisc.

 - Update raw.c open_socket() to accept a socket_priority parameter
 - Add the socket_priority option to config.c and the default.cfg config
   file. The option defaults to 0.

CC: "Ong, Boon Leong" <boon.leong.ong@intel.com>
CC: "Wong, Vincent Por Yin" <vincent.por.yin.wong@intel.com>
Signed-off-by: Khor, Isaac Shi Yan <isaac.shi.yan.khor@intel.com>
master
Khor, Isaac Shi Yan 2019-08-07 11:31:18 +08:00 committed by Richard Cochran
parent f2aac1b30e
commit c15e8c7600
4 changed files with 22 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
config.c
View File

@ -285,6 +285,7 @@ struct config_item config_tab[] = {
GLOB_ITEM_INT("servo_num_offset_values", 10, 0, INT_MAX),
GLOB_ITEM_INT("servo_offset_threshold", 0, 0, INT_MAX),
GLOB_ITEM_INT("slaveOnly", 0, 0, 1),
GLOB_ITEM_INT("socket_priority", 0, 0, 15),
GLOB_ITEM_DBL("step_threshold", 0.0, 0.0, DBL_MAX),
GLOB_ITEM_INT("summary_interval", 0, INT_MIN, INT_MAX),
PORT_ITEM_INT("syncReceiptTimeout", 0, 0, UINT8_MAX),

1
configs/default.cfg
View File

@ -4,6 +4,7 @@
#
twoStepFlag 1
slaveOnly 0
socket_priority 0
priority1 128
priority2 128
domainNumber 0

7
ptp4l.8
View File

@ -384,6 +384,13 @@ The default is 1 (enabled).
.B slaveOnly
The local clock is a slave-only clock if enabled. The default is 0 (disabled).
.TP
.B socket_priority
Configure the SO_PRIORITY of sockets. This is to support cases where a user
wants to route ptp4l traffic using Linux qdiscs for the purpose of traffic
shaping. This option is only available with the IEEE 802.3 transport (the
\fB-2\fP option) and is silently ignored when using the UDP IPv4/6 network
transports. Must be in the range of 0 to 15, inclusive. The default is 0.
.TP
.B gmCapable
If this option is enabled, then the local clock is able to become grand master.
This is only for use with 802.1AS clocks and has no effect on 1588 clocks.

17
raw.c
View File

@ -150,7 +150,7 @@ static int raw_close(struct transport *t, struct fdarray *fda)
}
static int open_socket(const char *name, int event, unsigned char *ptp_dst_mac,
unsigned char *p2p_dst_mac)
unsigned char *p2p_dst_mac, int socket_priority)
{
struct sockaddr_ll addr;
int fd, index;
@ -176,6 +176,13 @@ static int open_socket(const char *name, int event, unsigned char *ptp_dst_mac,
pr_err("setsockopt SO_BINDTODEVICE failed: %m");
goto no_option;
}
if (socket_priority > 0 &&
setsockopt(fd, SOL_SOCKET, SO_PRIORITY, &socket_priority,
sizeof(socket_priority))) {
pr_err("setsockopt SO_PRIORITY failed: %m");
goto no_option;
}
if (raw_configure(fd, event, index, ptp_dst_mac, p2p_dst_mac, 1))
goto no_option;
@ -205,7 +212,7 @@ static int raw_open(struct transport *t, struct interface *iface,
struct raw *raw = container_of(t, struct raw, t);
unsigned char ptp_dst_mac[MAC_LEN];
unsigned char p2p_dst_mac[MAC_LEN];
int efd, gfd;
int efd, gfd, socket_priority;
char *str, *name;
name = iface->ts_label;
@ -225,11 +232,13 @@ static int raw_open(struct transport *t, struct interface *iface,
if (sk_interface_macaddr(name, &raw->src_addr))
goto no_mac;
efd = open_socket(name, 1, ptp_dst_mac, p2p_dst_mac);
socket_priority = config_get_int(t->cfg, "global", "socket_priority");
efd = open_socket(name, 1, ptp_dst_mac, p2p_dst_mac, socket_priority);
if (efd < 0)
goto no_event;
gfd = open_socket(name, 0, ptp_dst_mac, p2p_dst_mac);
gfd = open_socket(name, 0, ptp_dst_mac, p2p_dst_mac, socket_priority);
if (gfd < 0)
goto no_general;