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0189197f EB |
1 | #ifndef MPLS_INTERNAL_H |
2 | #define MPLS_INTERNAL_H | |
9095e10e | 3 | #include <net/mpls.h> |
0189197f EB |
4 | |
5 | struct mpls_entry_decoded { | |
6 | u32 label; | |
7 | u8 ttl; | |
8 | u8 tc; | |
9 | u8 bos; | |
10 | }; | |
11 | ||
27d69105 RS |
12 | struct mpls_pcpu_stats { |
13 | struct mpls_link_stats stats; | |
14 | struct u64_stats_sync syncp; | |
15 | }; | |
16 | ||
03c57747 | 17 | struct mpls_dev { |
27d69105 | 18 | int input_enabled; |
24045a03 | 19 | struct net_device *dev; |
27d69105 RS |
20 | struct mpls_pcpu_stats __percpu *stats; |
21 | ||
22 | struct ctl_table_header *sysctl; | |
23 | struct rcu_head rcu; | |
03c57747 RS |
24 | }; |
25 | ||
27d69105 RS |
26 | #if BITS_PER_LONG == 32 |
27 | ||
28 | #define MPLS_INC_STATS_LEN(mdev, len, pkts_field, bytes_field) \ | |
29 | do { \ | |
30 | __typeof__(*(mdev)->stats) *ptr = \ | |
31 | raw_cpu_ptr((mdev)->stats); \ | |
32 | local_bh_disable(); \ | |
33 | u64_stats_update_begin(&ptr->syncp); \ | |
34 | ptr->stats.pkts_field++; \ | |
35 | ptr->stats.bytes_field += (len); \ | |
36 | u64_stats_update_end(&ptr->syncp); \ | |
37 | local_bh_enable(); \ | |
38 | } while (0) | |
39 | ||
40 | #define MPLS_INC_STATS(mdev, field) \ | |
41 | do { \ | |
42 | __typeof__(*(mdev)->stats) *ptr = \ | |
43 | raw_cpu_ptr((mdev)->stats); \ | |
44 | local_bh_disable(); \ | |
45 | u64_stats_update_begin(&ptr->syncp); \ | |
46 | ptr->stats.field++; \ | |
47 | u64_stats_update_end(&ptr->syncp); \ | |
48 | local_bh_enable(); \ | |
49 | } while (0) | |
50 | ||
51 | #else | |
52 | ||
53 | #define MPLS_INC_STATS_LEN(mdev, len, pkts_field, bytes_field) \ | |
54 | do { \ | |
55 | this_cpu_inc((mdev)->stats->stats.pkts_field); \ | |
56 | this_cpu_add((mdev)->stats->stats.bytes_field, (len)); \ | |
57 | } while (0) | |
58 | ||
59 | #define MPLS_INC_STATS(mdev, field) \ | |
60 | this_cpu_inc((mdev)->stats->stats.field) | |
61 | ||
62 | #endif | |
63 | ||
0189197f EB |
64 | struct sk_buff; |
65 | ||
f8efb73c RP |
66 | #define LABEL_NOT_SPECIFIED (1 << 20) |
67 | #define MAX_NEW_LABELS 2 | |
68 | ||
69 | /* This maximum ha length copied from the definition of struct neighbour */ | |
cf4b24f0 RS |
70 | #define VIA_ALEN_ALIGN sizeof(unsigned long) |
71 | #define MAX_VIA_ALEN (ALIGN(MAX_ADDR_LEN, VIA_ALEN_ALIGN)) | |
f8efb73c RP |
72 | |
73 | enum mpls_payload_type { | |
74 | MPT_UNSPEC, /* IPv4 or IPv6 */ | |
75 | MPT_IPV4 = 4, | |
76 | MPT_IPV6 = 6, | |
77 | ||
78 | /* Other types not implemented: | |
79 | * - Pseudo-wire with or without control word (RFC4385) | |
80 | * - GAL (RFC5586) | |
81 | */ | |
82 | }; | |
83 | ||
84 | struct mpls_nh { /* next hop label forwarding entry */ | |
85 | struct net_device __rcu *nh_dev; | |
c89359a4 | 86 | unsigned int nh_flags; |
f8efb73c RP |
87 | u32 nh_label[MAX_NEW_LABELS]; |
88 | u8 nh_labels; | |
89 | u8 nh_via_alen; | |
90 | u8 nh_via_table; | |
f8efb73c RP |
91 | }; |
92 | ||
cf4b24f0 RS |
93 | /* The route, nexthops and vias are stored together in the same memory |
94 | * block: | |
95 | * | |
96 | * +----------------------+ | |
97 | * | mpls_route | | |
98 | * +----------------------+ | |
99 | * | mpls_nh 0 | | |
100 | * +----------------------+ | |
101 | * | ... | | |
102 | * +----------------------+ | |
103 | * | mpls_nh n-1 | | |
104 | * +----------------------+ | |
105 | * | alignment padding | | |
106 | * +----------------------+ | |
107 | * | via[rt_max_alen] 0 | | |
108 | * +----------------------+ | |
109 | * | ... | | |
110 | * +----------------------+ | |
111 | * | via[rt_max_alen] n-1 | | |
112 | * +----------------------+ | |
113 | */ | |
f8efb73c RP |
114 | struct mpls_route { /* next hop label forwarding entry */ |
115 | struct rcu_head rt_rcu; | |
116 | u8 rt_protocol; | |
117 | u8 rt_payload_type; | |
cf4b24f0 RS |
118 | u8 rt_max_alen; |
119 | unsigned int rt_nhn; | |
c89359a4 | 120 | unsigned int rt_nhn_alive; |
f8efb73c RP |
121 | struct mpls_nh rt_nh[0]; |
122 | }; | |
123 | ||
124 | #define for_nexthops(rt) { \ | |
125 | int nhsel; struct mpls_nh *nh; \ | |
126 | for (nhsel = 0, nh = (rt)->rt_nh; \ | |
127 | nhsel < (rt)->rt_nhn; \ | |
128 | nh++, nhsel++) | |
129 | ||
130 | #define change_nexthops(rt) { \ | |
131 | int nhsel; struct mpls_nh *nh; \ | |
132 | for (nhsel = 0, nh = (struct mpls_nh *)((rt)->rt_nh); \ | |
133 | nhsel < (rt)->rt_nhn; \ | |
134 | nh++, nhsel++) | |
135 | ||
136 | #define endfor_nexthops(rt) } | |
137 | ||
0189197f EB |
138 | static inline struct mpls_shim_hdr mpls_entry_encode(u32 label, unsigned ttl, unsigned tc, bool bos) |
139 | { | |
140 | struct mpls_shim_hdr result; | |
141 | result.label_stack_entry = | |
142 | cpu_to_be32((label << MPLS_LS_LABEL_SHIFT) | | |
143 | (tc << MPLS_LS_TC_SHIFT) | | |
144 | (bos ? (1 << MPLS_LS_S_SHIFT) : 0) | | |
145 | (ttl << MPLS_LS_TTL_SHIFT)); | |
146 | return result; | |
147 | } | |
148 | ||
149 | static inline struct mpls_entry_decoded mpls_entry_decode(struct mpls_shim_hdr *hdr) | |
150 | { | |
151 | struct mpls_entry_decoded result; | |
152 | unsigned entry = be32_to_cpu(hdr->label_stack_entry); | |
153 | ||
154 | result.label = (entry & MPLS_LS_LABEL_MASK) >> MPLS_LS_LABEL_SHIFT; | |
155 | result.ttl = (entry & MPLS_LS_TTL_MASK) >> MPLS_LS_TTL_SHIFT; | |
156 | result.tc = (entry & MPLS_LS_TC_MASK) >> MPLS_LS_TC_SHIFT; | |
157 | result.bos = (entry & MPLS_LS_S_MASK) >> MPLS_LS_S_SHIFT; | |
158 | ||
159 | return result; | |
160 | } | |
161 | ||
27d69105 RS |
162 | static inline struct mpls_dev *mpls_dev_get(const struct net_device *dev) |
163 | { | |
164 | return rcu_dereference_rtnl(dev->mpls_ptr); | |
165 | } | |
166 | ||
face0188 RP |
167 | int nla_put_labels(struct sk_buff *skb, int attrtype, u8 labels, |
168 | const u32 label[]); | |
f8efb73c | 169 | int nla_get_labels(const struct nlattr *nla, u32 max_labels, u8 *labels, |
face0188 | 170 | u32 label[]); |
f8efb73c RP |
171 | int nla_get_via(const struct nlattr *nla, u8 *via_alen, u8 *via_table, |
172 | u8 via[]); | |
face0188 RP |
173 | bool mpls_output_possible(const struct net_device *dev); |
174 | unsigned int mpls_dev_mtu(const struct net_device *dev); | |
175 | bool mpls_pkt_too_big(const struct sk_buff *skb, unsigned int mtu); | |
27d69105 RS |
176 | void mpls_stats_inc_outucastpkts(struct net_device *dev, |
177 | const struct sk_buff *skb); | |
966bae33 | 178 | |
0189197f | 179 | #endif /* MPLS_INTERNAL_H */ |