diff options
author | David Ahern <dsa@cumulusnetworks.com> | 2018-03-28 04:22:00 +0300 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2018-03-29 21:10:31 +0300 |
commit | 37923ed6b8cea94d7d76038e2f72c57a0b45daab (patch) | |
tree | 51418fe5934da050f867b26bf0ee836e14cbc38a /drivers/net/netdevsim/netdevsim.h | |
parent | 2233000cba40ee0784a2d5b5e2b2c38c1159a7ef (diff) | |
download | linux-37923ed6b8cea94d7d76038e2f72c57a0b45daab.tar.xz |
netdevsim: Add simple FIB resource controller via devlink
Add devlink support to netdevsim and use it to implement a simple,
profile based resource controller. Only one controller is needed
per namespace, so the first netdevsim netdevice in a namespace
registers with devlink. If that device is deleted, the resource
settings are deleted.
The resource controller allows a user to limit the number of IPv4 and
IPv6 FIB entries and FIB rules. The resource paths are:
/IPv4
/IPv4/fib
/IPv4/fib-rules
/IPv6
/IPv6/fib
/IPv6/fib-rules
The IPv4 and IPv6 top level resources are unlimited in size and can not
be changed. From there, the number of FIB entries and FIB rule entries
are unlimited by default. A user can specify a limit for the fib and
fib-rules resources:
$ devlink resource set netdevsim/netdevsim0 path /IPv4/fib size 96
$ devlink resource set netdevsim/netdevsim0 path /IPv4/fib-rules size 16
$ devlink resource set netdevsim/netdevsim0 path /IPv6/fib size 64
$ devlink resource set netdevsim/netdevsim0 path /IPv6/fib-rules size 16
$ devlink dev reload netdevsim/netdevsim0
such that the number of rules or routes is limited (96 ipv4 routes in the
example above):
$ for n in $(seq 1 32); do ip ro add 10.99.$n.0/24 dev eth1; done
Error: netdevsim: Exceeded number of supported fib entries.
$ devlink resource show netdevsim/netdevsim0
netdevsim/netdevsim0:
name IPv4 size unlimited unit entry size_min 0 size_max unlimited size_gran 1 dpipe_tables non
resources:
name fib size 96 occ 96 unit entry size_min 0 size_max unlimited size_gran 1 dpipe_tables
...
With this template in place for resource management, it is fairly trivial
to extend and shows one way to implement a simple counter based resource
controller typical of network profiles.
Currently, devlink only supports initial namespace. Code is in place to
adapt netdevsim to a per namespace controller once the network namespace
issues are resolved.
Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/netdevsim/netdevsim.h')
-rw-r--r-- | drivers/net/netdevsim/netdevsim.h | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/drivers/net/netdevsim/netdevsim.h b/drivers/net/netdevsim/netdevsim.h index ea081c10efb8..afb8cf90c0fd 100644 --- a/drivers/net/netdevsim/netdevsim.h +++ b/drivers/net/netdevsim/netdevsim.h @@ -64,6 +64,9 @@ struct netdevsim { bool bpf_map_accept; struct list_head bpf_bound_maps; +#if IS_ENABLED(CONFIG_NET_DEVLINK) + struct devlink *devlink; +#endif }; extern struct dentry *nsim_ddir; @@ -103,6 +106,46 @@ nsim_bpf_setup_tc_block_cb(enum tc_setup_type type, void *type_data, } #endif +#if IS_ENABLED(CONFIG_NET_DEVLINK) +enum nsim_resource_id { + NSIM_RESOURCE_NONE, /* DEVLINK_RESOURCE_ID_PARENT_TOP */ + NSIM_RESOURCE_IPV4, + NSIM_RESOURCE_IPV4_FIB, + NSIM_RESOURCE_IPV4_FIB_RULES, + NSIM_RESOURCE_IPV6, + NSIM_RESOURCE_IPV6_FIB, + NSIM_RESOURCE_IPV6_FIB_RULES, +}; + +void nsim_devlink_setup(struct netdevsim *ns); +void nsim_devlink_teardown(struct netdevsim *ns); + +int nsim_devlink_init(void); +void nsim_devlink_exit(void); + +int nsim_fib_init(void); +void nsim_fib_exit(void); +u64 nsim_fib_get_val(struct net *net, enum nsim_resource_id res_id, bool max); +int nsim_fib_set_max(struct net *net, enum nsim_resource_id res_id, u64 val); +#else +static inline void nsim_devlink_setup(struct netdevsim *ns) +{ +} + +static inline void nsim_devlink_teardown(struct netdevsim *ns) +{ +} + +static inline int nsim_devlink_init(void) +{ + return 0; +} + +static inline void nsim_devlink_exit(void) +{ +} +#endif + static inline struct netdevsim *to_nsim(struct device *ptr) { return container_of(ptr, struct netdevsim, dev); |