On Thu, 3 Aug 2017, Tom Herbert wrote:
Generalize the TCP ULP infrastructure recently introduced to support
kTLS. This adds a SO_ULP socket option and creates new fields in
sock structure for ULP ops and ULP data. Also, the interface allows
additional per ULP parameters to be set so that a ULP can be pushed
and operations started in one shot.
Signed-off-by: Tom Herbert <[email protected]>
---
arch/alpha/include/uapi/asm/socket.h | 2 +
arch/frv/include/uapi/asm/socket.h | 2 +
arch/ia64/include/uapi/asm/socket.h | 2 +
arch/m32r/include/uapi/asm/socket.h | 2 +
arch/mips/include/uapi/asm/socket.h | 2 +
arch/mn10300/include/uapi/asm/socket.h | 2 +
arch/parisc/include/uapi/asm/socket.h | 2 +
arch/s390/include/uapi/asm/socket.h | 2 +
arch/sparc/include/uapi/asm/socket.h | 2 +
arch/xtensa/include/uapi/asm/socket.h | 2 +
include/linux/socket.h | 9 ++
include/net/sock.h | 5 +
include/net/ulp_sock.h | 75 +++++++++++++
include/uapi/asm-generic/socket.h | 2 +
net/Kconfig | 4 +
net/core/Makefile | 1 +
net/core/sock.c | 14 +++
net/core/sysctl_net_core.c | 25 +++++
net/core/ulp_sock.c | 194 +++++++++++++++++++++++++++++++++
19 files changed, 349 insertions(+)
create mode 100644 include/net/ulp_sock.h
create mode 100644 net/core/ulp_sock.c
...
diff --git a/include/net/ulp_sock.h b/include/net/ulp_sock.h
new file mode 100644
index 000000000000..37bf4d2e16b9
--- /dev/null
+++ b/include/net/ulp_sock.h
@@ -0,0 +1,75 @@
+/*
+ * Pluggable upper layer protocol support in sockets.
+ *
+ * Copyright (c) 2016-2017, Mellanox Technologies. All rights reserved.
+ * Copyright (c) 2016-2017, Dave Watson <[email protected]>. All rights
reserved.
+ * Copyright (c) 2017, Tom Herbert <[email protected]>. All rights reserved.
+ *
+ */
+
+#ifndef __NET_ULP_SOCK_H
+#define __NET_ULP_SOCK_H
+
+#include <linux/socket.h>
+
+#define ULP_MAX 128
+#define ULP_BUF_MAX (ULP_NAME_MAX * ULP_MAX)
+
+struct ulp_ops {
+ struct list_head list;
+
+ /* initialize ulp */
+ int (*init)(struct sock *sk, char __user *optval, int len);
+
+ /* cleanup ulp */
+ void (*release)(struct sock *sk);
+
+ /* Get ULP specific parameters in getsockopt */
+ int (*get_params)(struct sock *sk, char __user *optval, int *optlen);
+
+ char name[ULP_NAME_MAX];
+ struct module *owner;
+};
+
+#ifdef CONFIG_ULP_SOCK
+
+int ulp_register(struct ulp_ops *type);
+void ulp_unregister(struct ulp_ops *type);
+int ulp_set(struct sock *sk, char __user *optval, int len);
+int ulp_get_config(struct sock *sk, char __user *optval, int *optlen);
+void ulp_get_available(char *buf, size_t len);
+void ulp_cleanup(struct sock *sk);
+
+#else
+
+static inline int ulp_register(struct ulp_ops *type)
+{
+ return -EOPNOTSUPP;
+}
+
+static inline void ulp_unregister(struct ulp_ops *type)
+{
+}
+
+static inline int ulp_set(struct sock *sk, char __user *optval, int len)
+{
+ return -EOPNOTSUPP;
+}
+
+static inline int ulp_get_config(struct sock *sk, char __user *optval,
+ int *optlen)
+{
+ return -EOPNOTSUPP;
+}
+
+static inline void ulp_get_available(char *buf, size_t len)
+{
proc_ulp_available() doesn't initialize *buf, so the string needs to be
NUL-terminated here.
+}
+
+static inline void ulp_cleanup(struct sock *sk)
+{
+}
+
+#endif
+
+#endif /* __NET_ULP_SOCK_H */
...
diff --git a/net/core/sysctl_net_core.c b/net/core/sysctl_net_core.c
index b7cd9aafe99e..9e14f91b57eb 100644
--- a/net/core/sysctl_net_core.c
+++ b/net/core/sysctl_net_core.c
@@ -21,6 +21,7 @@
#include <net/net_ratelimit.h>
#include <net/busy_poll.h>
#include <net/pkt_sched.h>
+#include <net/ulp_sock.h>
static int zero = 0;
static int one = 1;
@@ -249,6 +250,24 @@ static int proc_do_rss_key(struct ctl_table *table, int
write,
return proc_dostring(&fake_table, write, buffer, lenp, ppos);
}
+static int proc_ulp_available(struct ctl_table *ctl,
+ int write,
+ void __user *buffer, size_t *lenp,
+ loff_t *ppos)
+{
+ struct ctl_table tbl = { .maxlen = ULP_BUF_MAX, };
+ int ret;
+
+ tbl.data = kmalloc(tbl.maxlen, GFP_USER);
(Just flagging this to provide context for the uninitialized data comment
above)
+ if (!tbl.data)
+ return -ENOMEM;
+ ulp_get_available(tbl.data, ULP_BUF_MAX);
+ ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
+ kfree(tbl.data);
+
+ return ret;
+}
+
static struct ctl_table net_core_table[] = {
#ifdef CONFIG_NET
{
@@ -460,6 +479,12 @@ static struct ctl_table net_core_table[] = {
.proc_handler = proc_dointvec_minmax,
.extra1 = &zero,
},
+ {
+ .procname = "ulp_available",
+ .maxlen = ULP_BUF_MAX,
+ .mode = 0444,
+ .proc_handler = proc_ulp_available,
+ },
{ }
};
Regards,
--
Mat Martineau
Intel OTC
