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c9422999 | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
ccb1352e | 2 | /* |
caf2ee14 | 3 | * Copyright (c) 2007-2012 Nicira, Inc. |
ccb1352e JG |
4 | */ |
5 | ||
6 | #ifndef VPORT_H | |
7 | #define VPORT_H 1 | |
8 | ||
e0f0ecf3 | 9 | #include <linux/if_tunnel.h> |
ccb1352e | 10 | #include <linux/list.h> |
46df7b81 | 11 | #include <linux/netlink.h> |
ccb1352e | 12 | #include <linux/openvswitch.h> |
5cd667b0 | 13 | #include <linux/reciprocal_div.h> |
ccb1352e JG |
14 | #include <linux/skbuff.h> |
15 | #include <linux/spinlock.h> | |
16 | #include <linux/u64_stats_sync.h> | |
17 | ||
18 | #include "datapath.h" | |
19 | ||
20 | struct vport; | |
21 | struct vport_parms; | |
22 | ||
f4477305 | 23 | /* The following definitions are for users of the vport subsystem: */ |
ccb1352e JG |
24 | |
25 | int ovs_vport_init(void); | |
26 | void ovs_vport_exit(void); | |
27 | ||
28 | struct vport *ovs_vport_add(const struct vport_parms *); | |
29 | void ovs_vport_del(struct vport *); | |
30 | ||
12eb18f7 | 31 | struct vport *ovs_vport_locate(const struct net *net, const char *name); |
ccb1352e JG |
32 | |
33 | void ovs_vport_get_stats(struct vport *, struct ovs_vport_stats *); | |
34 | ||
35 | int ovs_vport_set_options(struct vport *, struct nlattr *options); | |
36 | int ovs_vport_get_options(const struct vport *, struct sk_buff *); | |
37 | ||
12eb18f7 | 38 | int ovs_vport_set_upcall_portids(struct vport *, const struct nlattr *pids); |
5cd667b0 AW |
39 | int ovs_vport_get_upcall_portids(const struct vport *, struct sk_buff *); |
40 | u32 ovs_vport_find_upcall_portid(const struct vport *, struct sk_buff *); | |
41 | ||
5cd667b0 AW |
42 | /** |
43 | * struct vport_portids - array of netlink portids of a vport. | |
44 | * must be protected by rcu. | |
45 | * @rn_ids: The reciprocal value of @n_ids. | |
46 | * @rcu: RCU callback head for deferred destruction. | |
47 | * @n_ids: Size of @ids array. | |
48 | * @ids: Array storing the Netlink socket pids to be used for packets received | |
49 | * on this port that miss the flow table. | |
50 | */ | |
51 | struct vport_portids { | |
52 | struct reciprocal_value rn_ids; | |
53 | struct rcu_head rcu; | |
54 | u32 n_ids; | |
55 | u32 ids[]; | |
56 | }; | |
ccb1352e JG |
57 | |
58 | /** | |
59 | * struct vport - one port within a datapath | |
c5420eb1 | 60 | * @dev: Pointer to net_device. |
e7c8ab84 | 61 | * @dev_tracker: refcount tracker for @dev reference |
ccb1352e | 62 | * @dp: Datapath to which this port belongs. |
5cd667b0 | 63 | * @upcall_portids: RCU protected 'struct vport_portids'. |
03599c94 | 64 | * @port_no: Index into @dp's @ports array. |
ccb1352e | 65 | * @hash_node: Element in @dev_table hash table in vport.c. |
15eac2a7 | 66 | * @dp_hash_node: Element in @datapath->ports hash table in datapath.c. |
ccb1352e | 67 | * @ops: Class structure. |
7b4577a9 | 68 | * @detach_list: list used for detaching vport in net-exit call. |
c5420eb1 | 69 | * @rcu: RCU callback head for deferred destruction. |
ccb1352e JG |
70 | */ |
71 | struct vport { | |
be4ace6e | 72 | struct net_device *dev; |
e7c8ab84 | 73 | netdevice_tracker dev_tracker; |
ccb1352e | 74 | struct datapath *dp; |
5cd667b0 | 75 | struct vport_portids __rcu *upcall_portids; |
03599c94 | 76 | u16 port_no; |
ccb1352e JG |
77 | |
78 | struct hlist_node hash_node; | |
15eac2a7 | 79 | struct hlist_node dp_hash_node; |
ccb1352e JG |
80 | const struct vport_ops *ops; |
81 | ||
7b4577a9 | 82 | struct list_head detach_list; |
be4ace6e | 83 | struct rcu_head rcu; |
ccb1352e JG |
84 | }; |
85 | ||
86 | /** | |
87 | * struct vport_parms - parameters for creating a new vport | |
88 | * | |
89 | * @name: New vport's name. | |
90 | * @type: New vport's type. | |
91 | * @options: %OVS_VPORT_ATTR_OPTIONS attribute from Netlink message, %NULL if | |
92 | * none was supplied. | |
93 | * @dp: New vport's datapath. | |
94 | * @port_no: New vport's port number. | |
95 | */ | |
96 | struct vport_parms { | |
97 | const char *name; | |
98 | enum ovs_vport_type type; | |
99 | struct nlattr *options; | |
100 | ||
101 | /* For ovs_vport_alloc(). */ | |
102 | struct datapath *dp; | |
103 | u16 port_no; | |
5cd667b0 | 104 | struct nlattr *upcall_portids; |
ccb1352e JG |
105 | }; |
106 | ||
107 | /** | |
108 | * struct vport_ops - definition of a type of virtual port | |
109 | * | |
110 | * @type: %OVS_VPORT_TYPE_* value for this type of virtual port. | |
111 | * @create: Create a new vport configured as specified. On success returns | |
112 | * a new vport allocated with ovs_vport_alloc(), otherwise an ERR_PTR() value. | |
113 | * @destroy: Destroys a vport. Must call vport_free() on the vport but not | |
114 | * before an RCU grace period has elapsed. | |
115 | * @set_options: Modify the configuration of an existing vport. May be %NULL | |
116 | * if modification is not supported. | |
117 | * @get_options: Appends vport-specific attributes for the configuration of an | |
118 | * existing vport to a &struct sk_buff. May be %NULL for a vport that does not | |
119 | * have any configuration. | |
8c876639 | 120 | * @send: Send a packet on the device. |
91b7514c | 121 | * zero for dropped packets or negative for error. |
ccb1352e JG |
122 | */ |
123 | struct vport_ops { | |
124 | enum ovs_vport_type type; | |
125 | ||
8e4e1713 | 126 | /* Called with ovs_mutex. */ |
ccb1352e JG |
127 | struct vport *(*create)(const struct vport_parms *); |
128 | void (*destroy)(struct vport *); | |
129 | ||
130 | int (*set_options)(struct vport *, struct nlattr *); | |
131 | int (*get_options)(const struct vport *, struct sk_buff *); | |
132 | ||
aec15924 | 133 | netdev_tx_t (*send) (struct sk_buff *skb); |
62b9c8d0 TG |
134 | struct module *owner; |
135 | struct list_head list; | |
ccb1352e JG |
136 | }; |
137 | ||
ccb1352e JG |
138 | struct vport *ovs_vport_alloc(int priv_size, const struct vport_ops *, |
139 | const struct vport_parms *); | |
140 | void ovs_vport_free(struct vport *); | |
141 | ||
142 | #define VPORT_ALIGN 8 | |
143 | ||
144 | /** | |
145 | * vport_priv - access private data area of vport | |
146 | * | |
147 | * @vport: vport to access | |
148 | * | |
149 | * If a nonzero size was passed in priv_size of vport_alloc() a private data | |
150 | * area was allocated on creation. This allows that area to be accessed and | |
151 | * used for any purpose needed by the vport implementer. | |
152 | */ | |
153 | static inline void *vport_priv(const struct vport *vport) | |
154 | { | |
07dc0602 | 155 | return (u8 *)(uintptr_t)vport + ALIGN(sizeof(struct vport), VPORT_ALIGN); |
ccb1352e JG |
156 | } |
157 | ||
158 | /** | |
159 | * vport_from_priv - lookup vport from private data pointer | |
160 | * | |
161 | * @priv: Start of private data area. | |
162 | * | |
163 | * It is sometimes useful to translate from a pointer to the private data | |
164 | * area to the vport, such as in the case where the private data pointer is | |
165 | * the result of a hash table lookup. @priv must point to the start of the | |
166 | * private data area. | |
167 | */ | |
d0b4da13 | 168 | static inline struct vport *vport_from_priv(void *priv) |
ccb1352e | 169 | { |
d0b4da13 | 170 | return (struct vport *)((u8 *)priv - ALIGN(sizeof(struct vport), VPORT_ALIGN)); |
ccb1352e JG |
171 | } |
172 | ||
8c876639 PS |
173 | int ovs_vport_receive(struct vport *, struct sk_buff *, |
174 | const struct ip_tunnel_info *); | |
ccb1352e | 175 | |
c9db965c TG |
176 | static inline const char *ovs_vport_name(struct vport *vport) |
177 | { | |
24d43f32 | 178 | return vport->dev->name; |
c9db965c TG |
179 | } |
180 | ||
83e4bf7a PA |
181 | int __ovs_vport_ops_register(struct vport_ops *ops); |
182 | #define ovs_vport_ops_register(ops) \ | |
183 | ({ \ | |
184 | (ops)->owner = THIS_MODULE; \ | |
185 | __ovs_vport_ops_register(ops); \ | |
186 | }) | |
187 | ||
62b9c8d0 | 188 | void ovs_vport_ops_unregister(struct vport_ops *ops); |
e2d9d835 | 189 | void ovs_vport_send(struct vport *vport, struct sk_buff *skb, u8 mac_proto); |
8c876639 | 190 | |
ccb1352e | 191 | #endif /* vport.h */ |