Merge tag 'block-5.16-2021-11-25' of git://git.kernel.dk/linux-block
[linux-2.6-microblaze.git] / include / net / if_inet6.h
1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3  *      inet6 interface/address list definitions
4  *      Linux INET6 implementation 
5  *
6  *      Authors:
7  *      Pedro Roque             <roque@di.fc.ul.pt>     
8  */
9
10 #ifndef _NET_IF_INET6_H
11 #define _NET_IF_INET6_H
12
13 #include <net/snmp.h>
14 #include <linux/ipv6.h>
15 #include <linux/refcount.h>
16
17 /* inet6_dev.if_flags */
18
19 #define IF_RA_OTHERCONF 0x80
20 #define IF_RA_MANAGED   0x40
21 #define IF_RA_RCVD      0x20
22 #define IF_RS_SENT      0x10
23 #define IF_READY        0x80000000
24
25 /* prefix flags */
26 #define IF_PREFIX_ONLINK        0x01
27 #define IF_PREFIX_AUTOCONF      0x02
28
29 enum {
30         INET6_IFADDR_STATE_PREDAD,
31         INET6_IFADDR_STATE_DAD,
32         INET6_IFADDR_STATE_POSTDAD,
33         INET6_IFADDR_STATE_ERRDAD,
34         INET6_IFADDR_STATE_DEAD,
35 };
36
37 struct inet6_ifaddr {
38         struct in6_addr         addr;
39         __u32                   prefix_len;
40         __u32                   rt_priority;
41
42         /* In seconds, relative to tstamp. Expiry is at tstamp + HZ * lft. */
43         __u32                   valid_lft;
44         __u32                   prefered_lft;
45         refcount_t              refcnt;
46         spinlock_t              lock;
47
48         int                     state;
49
50         __u32                   flags;
51         __u8                    dad_probes;
52         __u8                    stable_privacy_retry;
53
54         __u16                   scope;
55         __u64                   dad_nonce;
56
57         unsigned long           cstamp; /* created timestamp */
58         unsigned long           tstamp; /* updated timestamp */
59
60         struct delayed_work     dad_work;
61
62         struct inet6_dev        *idev;
63         struct fib6_info        *rt;
64
65         struct hlist_node       addr_lst;
66         struct list_head        if_list;
67
68         struct list_head        tmp_list;
69         struct inet6_ifaddr     *ifpub;
70         int                     regen_count;
71
72         bool                    tokenized;
73
74         struct rcu_head         rcu;
75         struct in6_addr         peer_addr;
76 };
77
78 struct ip6_sf_socklist {
79         unsigned int            sl_max;
80         unsigned int            sl_count;
81         struct rcu_head         rcu;
82         struct in6_addr         sl_addr[];
83 };
84
85 #define IP6_SFBLOCK     10      /* allocate this many at once */
86
87 struct ipv6_mc_socklist {
88         struct in6_addr         addr;
89         int                     ifindex;
90         unsigned int            sfmode;         /* MCAST_{INCLUDE,EXCLUDE} */
91         struct ipv6_mc_socklist __rcu *next;
92         struct ip6_sf_socklist  __rcu *sflist;
93         struct rcu_head         rcu;
94 };
95
96 struct ip6_sf_list {
97         struct ip6_sf_list __rcu *sf_next;
98         struct in6_addr         sf_addr;
99         unsigned long           sf_count[2];    /* include/exclude counts */
100         unsigned char           sf_gsresp;      /* include in g & s response? */
101         unsigned char           sf_oldin;       /* change state */
102         unsigned char           sf_crcount;     /* retrans. left to send */
103         struct rcu_head         rcu;
104 };
105
106 #define MAF_TIMER_RUNNING       0x01
107 #define MAF_LAST_REPORTER       0x02
108 #define MAF_LOADED              0x04
109 #define MAF_NOREPORT            0x08
110 #define MAF_GSQUERY             0x10
111
112 struct ifmcaddr6 {
113         struct in6_addr         mca_addr;
114         struct inet6_dev        *idev;
115         struct ifmcaddr6        __rcu *next;
116         struct ip6_sf_list      __rcu *mca_sources;
117         struct ip6_sf_list      __rcu *mca_tomb;
118         unsigned int            mca_sfmode;
119         unsigned char           mca_crcount;
120         unsigned long           mca_sfcount[2];
121         struct delayed_work     mca_work;
122         unsigned int            mca_flags;
123         int                     mca_users;
124         refcount_t              mca_refcnt;
125         unsigned long           mca_cstamp;
126         unsigned long           mca_tstamp;
127         struct rcu_head         rcu;
128 };
129
130 /* Anycast stuff */
131
132 struct ipv6_ac_socklist {
133         struct in6_addr         acl_addr;
134         int                     acl_ifindex;
135         struct ipv6_ac_socklist *acl_next;
136 };
137
138 struct ifacaddr6 {
139         struct in6_addr         aca_addr;
140         struct fib6_info        *aca_rt;
141         struct ifacaddr6        *aca_next;
142         struct hlist_node       aca_addr_lst;
143         int                     aca_users;
144         refcount_t              aca_refcnt;
145         unsigned long           aca_cstamp;
146         unsigned long           aca_tstamp;
147         struct rcu_head         rcu;
148 };
149
150 #define IFA_HOST        IPV6_ADDR_LOOPBACK
151 #define IFA_LINK        IPV6_ADDR_LINKLOCAL
152 #define IFA_SITE        IPV6_ADDR_SITELOCAL
153
154 struct ipv6_devstat {
155         struct proc_dir_entry   *proc_dir_entry;
156         DEFINE_SNMP_STAT(struct ipstats_mib, ipv6);
157         DEFINE_SNMP_STAT_ATOMIC(struct icmpv6_mib_device, icmpv6dev);
158         DEFINE_SNMP_STAT_ATOMIC(struct icmpv6msg_mib_device, icmpv6msgdev);
159 };
160
161 struct inet6_dev {
162         struct net_device       *dev;
163
164         struct list_head        addr_list;
165
166         struct ifmcaddr6        __rcu *mc_list;
167         struct ifmcaddr6        __rcu *mc_tomb;
168
169         unsigned char           mc_qrv;         /* Query Robustness Variable */
170         unsigned char           mc_gq_running;
171         unsigned char           mc_ifc_count;
172         unsigned char           mc_dad_count;
173
174         unsigned long           mc_v1_seen;     /* Max time we stay in MLDv1 mode */
175         unsigned long           mc_qi;          /* Query Interval */
176         unsigned long           mc_qri;         /* Query Response Interval */
177         unsigned long           mc_maxdelay;
178
179         struct delayed_work     mc_gq_work;     /* general query work */
180         struct delayed_work     mc_ifc_work;    /* interface change work */
181         struct delayed_work     mc_dad_work;    /* dad complete mc work */
182         struct delayed_work     mc_query_work;  /* mld query work */
183         struct delayed_work     mc_report_work; /* mld report work */
184
185         struct sk_buff_head     mc_query_queue;         /* mld query queue */
186         struct sk_buff_head     mc_report_queue;        /* mld report queue */
187
188         spinlock_t              mc_query_lock;  /* mld query queue lock */
189         spinlock_t              mc_report_lock; /* mld query report lock */
190         struct mutex            mc_lock;        /* mld global lock */
191
192         struct ifacaddr6        *ac_list;
193         rwlock_t                lock;
194         refcount_t              refcnt;
195         __u32                   if_flags;
196         int                     dead;
197
198         u32                     desync_factor;
199         struct list_head        tempaddr_list;
200
201         struct in6_addr         token;
202
203         struct neigh_parms      *nd_parms;
204         struct ipv6_devconf     cnf;
205         struct ipv6_devstat     stats;
206
207         struct timer_list       rs_timer;
208         __s32                   rs_interval;    /* in jiffies */
209         __u8                    rs_probes;
210
211         unsigned long           tstamp; /* ipv6InterfaceTable update timestamp */
212         struct rcu_head         rcu;
213
214         unsigned int            ra_mtu;
215 };
216
217 static inline void ipv6_eth_mc_map(const struct in6_addr *addr, char *buf)
218 {
219         /*
220          *      +-------+-------+-------+-------+-------+-------+
221          *      |   33  |   33  | DST13 | DST14 | DST15 | DST16 |
222          *      +-------+-------+-------+-------+-------+-------+
223          */
224
225         buf[0]= 0x33;
226         buf[1]= 0x33;
227
228         memcpy(buf + 2, &addr->s6_addr32[3], sizeof(__u32));
229 }
230
231 static inline void ipv6_arcnet_mc_map(const struct in6_addr *addr, char *buf)
232 {
233         buf[0] = 0x00;
234 }
235
236 static inline void ipv6_ib_mc_map(const struct in6_addr *addr,
237                                   const unsigned char *broadcast, char *buf)
238 {
239         unsigned char scope = broadcast[5] & 0xF;
240
241         buf[0]  = 0;            /* Reserved */
242         buf[1]  = 0xff;         /* Multicast QPN */
243         buf[2]  = 0xff;
244         buf[3]  = 0xff;
245         buf[4]  = 0xff;
246         buf[5]  = 0x10 | scope; /* scope from broadcast address */
247         buf[6]  = 0x60;         /* IPv6 signature */
248         buf[7]  = 0x1b;
249         buf[8]  = broadcast[8]; /* P_Key */
250         buf[9]  = broadcast[9];
251         memcpy(buf + 10, addr->s6_addr + 6, 10);
252 }
253
254 static inline int ipv6_ipgre_mc_map(const struct in6_addr *addr,
255                                     const unsigned char *broadcast, char *buf)
256 {
257         if ((broadcast[0] | broadcast[1] | broadcast[2] | broadcast[3]) != 0) {
258                 memcpy(buf, broadcast, 4);
259         } else {
260                 /* v4mapped? */
261                 if ((addr->s6_addr32[0] | addr->s6_addr32[1] |
262                      (addr->s6_addr32[2] ^ htonl(0x0000ffff))) != 0)
263                         return -EINVAL;
264                 memcpy(buf, &addr->s6_addr32[3], 4);
265         }
266         return 0;
267 }
268
269 #endif