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| author | Jiri Pirko <jiri@mellanox.com> | 2016-09-26 12:52:34 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-09-28 04:48:00 -0400 |
| commit | fd41b0eaa06a8a0516f9e0b0a5889035bf423784 (patch) | |
| tree | bdd2565cbf373e53c32a47ff30c11e4de0028ce7 /Documentation/networking | |
| parent | 347e3b28c1ba24c1ae2f30290d8247480ab9ce14 (diff) | |
| download | lwn-fd41b0eaa06a8a0516f9e0b0a5889035bf423784.tar.gz lwn-fd41b0eaa06a8a0516f9e0b0a5889035bf423784.zip | |
doc: update switchdev L3 section
This is to reflect the change of FIB offload infrastructure from
switchdev objects to FIB notifier.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation/networking')
| -rw-r--r-- | Documentation/networking/switchdev.txt | 27 |
1 files changed, 14 insertions, 13 deletions
diff --git a/Documentation/networking/switchdev.txt b/Documentation/networking/switchdev.txt index 44235e83799b..2bbac05ab9e2 100644 --- a/Documentation/networking/switchdev.txt +++ b/Documentation/networking/switchdev.txt @@ -314,30 +314,29 @@ the kernel, with the device doing the FIB lookup and forwarding. The device does a longest prefix match (LPM) on FIB entries matching route prefix and forwards the packet to the matching FIB entry's nexthop(s) egress ports. -To program the device, the driver implements support for -SWITCHDEV_OBJ_IPV[4|6]_FIB object using switchdev_port_obj_xxx ops. -switchdev_port_obj_add is used for both adding a new FIB entry to the device, -or modifying an existing entry on the device. +To program the device, the driver has to register a FIB notifier handler +using register_fib_notifier. The following events are available: +FIB_EVENT_ENTRY_ADD: used for both adding a new FIB entry to the device, + or modifying an existing entry on the device. +FIB_EVENT_ENTRY_DEL: used for removing a FIB entry +FIB_EVENT_RULE_ADD, FIB_EVENT_RULE_DEL: used to propagate FIB rule changes -XXX: Currently, only SWITCHDEV_OBJ_ID_IPV4_FIB objects are supported. +FIB_EVENT_ENTRY_ADD and FIB_EVENT_ENTRY_DEL events pass: -SWITCHDEV_OBJ_ID_IPV4_FIB object passes: - - struct switchdev_obj_ipv4_fib { /* IPV4_FIB */ + struct fib_entry_notifier_info { + struct fib_notifier_info info; /* must be first */ u32 dst; int dst_len; struct fib_info *fi; u8 tos; u8 type; - u32 nlflags; u32 tb_id; - } ipv4_fib; + u32 nlflags; + }; to add/modify/delete IPv4 dst/dest_len prefix on table tb_id. The *fi structure holds details on the route and route's nexthops. *dev is one of the -port netdevs mentioned in the routes next hop list. If the output port netdevs -referenced in the route's nexthop list don't all have the same switch ID, the -driver is not called to add/modify/delete the FIB entry. +port netdevs mentioned in the route's next hop list. Routes offloaded to the device are labeled with "offload" in the ip route listing: @@ -355,6 +354,8 @@ listing: 12.0.0.4 via 11.0.0.9 dev sw1p2 proto zebra metric 20 offload 192.168.0.0/24 dev eth0 proto kernel scope link src 192.168.0.15 +The "offload" flag is set in case at least one device offloads the FIB entry. + XXX: add/mod/del IPv6 FIB API Nexthop Resolution |