Change in libosmocore[master]: socket: Introduce osmo_sock_set_priority() helper function

laforge gerrit-no-reply at lists.osmocom.org
Tue Apr 27 20:25:21 UTC 2021


laforge has uploaded this change for review. ( https://gerrit.osmocom.org/c/libosmocore/+/23922 )


Change subject: socket: Introduce osmo_sock_set_priority() helper function
......................................................................

socket: Introduce osmo_sock_set_priority() helper function

In some situations we want to set the SO_PRIORITY socket option
to determine the in-kernel priority of packets generated by this
socket.

Change-Id: I89abffcd125e6d073338a5c6437b9433220e1823
Related: SYS#5427
---
M include/osmocom/core/socket.h
M src/socket.c
2 files changed, 9 insertions(+), 0 deletions(-)



  git pull ssh://gerrit.osmocom.org:29418/libosmocore refs/changes/22/23922/1

diff --git a/include/osmocom/core/socket.h b/include/osmocom/core/socket.h
index 92cd202..10e1766 100644
--- a/include/osmocom/core/socket.h
+++ b/include/osmocom/core/socket.h
@@ -123,6 +123,7 @@
 			       const struct osmo_sockaddr *sockaddr);
 
 int osmo_sock_set_dscp(int fd, uint8_t dscp);
+int osmo_sock_set_priority(int fd, int prio);
 
 #endif /* (!EMBEDDED) */
 /*! @} */
diff --git a/src/socket.c b/src/socket.c
index 095dee6..6b8c34a 100644
--- a/src/socket.c
+++ b/src/socket.c
@@ -1802,6 +1802,14 @@
 	return setsockopt(fd, IPPROTO_IP, IP_TOS, &tos, sizeof(tos));
 }
 
+/*! Set the priority value of a socket.
+ *  \param[in] prio priority value. Values outside 0..6 require CAP_NET_ADMIN.
+ *  \returns 0 on success; negative on error. */
+int osmo_sock_set_priority(int fd, int prio)
+{
+	/* and write it back to the kernel */
+	return setsockopt(fd, SOL_SOCKET, SO_PRIORITY, &prio, sizeof(prio));
+}
 
 #endif /* HAVE_SYS_SOCKET_H */
 

-- 
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Gerrit-Project: libosmocore
Gerrit-Branch: master
Gerrit-Change-Id: I89abffcd125e6d073338a5c6437b9433220e1823
Gerrit-Change-Number: 23922
Gerrit-PatchSet: 1
Gerrit-Owner: laforge <laforge at osmocom.org>
Gerrit-MessageType: newchange
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