diff mbox series

[net-next,01/18] nexthop: Add nexthop notification data structures

Message ID 20201104133040.1125369-2-idosch@idosch.org
State Accepted
Delegated to: David Miller
Headers show
Series nexthop: Add support for nexthop objects offload | expand

Checks

Context Check Description
jkicinski/cover_letter success Link
jkicinski/fixes_present success Link
jkicinski/patch_count fail Series longer than 15 patches
jkicinski/tree_selection success Clearly marked for net-next
jkicinski/subject_prefix success Link
jkicinski/source_inline success Was 0 now: 0
jkicinski/verify_signedoff success Link
jkicinski/module_param success Was 0 now: 0
jkicinski/build_32bit success Errors and warnings before: 680 this patch: 680
jkicinski/kdoc success Errors and warnings before: 0 this patch: 0
jkicinski/verify_fixes success Link
jkicinski/checkpatch success total: 0 errors, 0 warnings, 0 checks, 41 lines checked
jkicinski/build_allmodconfig_warn success Errors and warnings before: 705 this patch: 705
jkicinski/header_inline success Link
jkicinski/stable success Stable not CCed

Commit Message

Ido Schimmel Nov. 4, 2020, 1:30 p.m. UTC 
From: Ido Schimmel <idosch@nvidia.com>

Add data structures that will be used for nexthop replace and delete
notifications in the previously introduced nexthop notification chain.

New data structures are added instead of passing the existing nexthop
code structures directly for several reasons.

First, the existing structures encode a lot of bookkeeping information
which is irrelevant for listeners of the notification chain.

Second, the existing structures can be changed without worrying about
introducing regressions in listeners since they are not accessed
directly by them.

Third, listeners of the notification chain do not need to each parse the
relatively complex nexthop code structures. They are passing the
required information in a simplified way.

Note that a single 'has_encap' bit is added instead of the actual
encapsulation information since current listeners do not support such
nexthops.

Changes since RFC:
* s/is_encap/has_encap/

Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: David Ahern <dsahern@gmail.com>
---
 include/net/nexthop.h | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)
diff mbox series

Patch

diff --git a/include/net/nexthop.h b/include/net/nexthop.h
index 2fd76a9b6dc8..4a17b040b502 100644
--- a/include/net/nexthop.h
+++ b/include/net/nexthop.h
@@ -108,6 +108,41 @@  enum nexthop_event_type {
 	NEXTHOP_EVENT_DEL
 };
 
+struct nh_notifier_single_info {
+	struct net_device *dev;
+	u8 gw_family;
+	union {
+		__be32 ipv4;
+		struct in6_addr ipv6;
+	};
+	u8 is_reject:1,
+	   is_fdb:1,
+	   has_encap:1;
+};
+
+struct nh_notifier_grp_entry_info {
+	u8 weight;
+	u32 id;
+	struct nh_notifier_single_info nh;
+};
+
+struct nh_notifier_grp_info {
+	u16 num_nh;
+	bool is_fdb;
+	struct nh_notifier_grp_entry_info nh_entries[];
+};
+
+struct nh_notifier_info {
+	struct net *net;
+	struct netlink_ext_ack *extack;
+	u32 id;
+	bool is_grp;
+	union {
+		struct nh_notifier_single_info *nh;
+		struct nh_notifier_grp_info *nh_grp;
+	};
+};
+
 int register_nexthop_notifier(struct net *net, struct notifier_block *nb);
 int unregister_nexthop_notifier(struct net *net, struct notifier_block *nb);