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[/] [test_project/] [trunk/] [linux_sd_driver/] [net/] [8021q/] [vlan_netlink.c] - Blame information for rev 82

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/*
 *      VLAN netlink control interface
 *
 *      Copyright (c) 2007 Patrick McHardy <kaber@trash.net>
 *
 *      This program is free software; you can redistribute it and/or
 *      modify it under the terms of the GNU General Public License
 *      version 2 as published by the Free Software Foundation.
 */
 
#include <linux/kernel.h>
#include <linux/netdevice.h>
#include <linux/if_vlan.h>
#include <net/net_namespace.h>
#include <net/netlink.h>
#include <net/rtnetlink.h>
#include "vlan.h"
 
 
static const struct nla_policy vlan_policy[IFLA_VLAN_MAX + 1] = {
        [IFLA_VLAN_ID]          = { .type = NLA_U16 },
        [IFLA_VLAN_FLAGS]       = { .len = sizeof(struct ifla_vlan_flags) },
        [IFLA_VLAN_EGRESS_QOS]  = { .type = NLA_NESTED },
        [IFLA_VLAN_INGRESS_QOS] = { .type = NLA_NESTED },
};
 
static const struct nla_policy vlan_map_policy[IFLA_VLAN_QOS_MAX + 1] = {
        [IFLA_VLAN_QOS_MAPPING] = { .len = sizeof(struct ifla_vlan_qos_mapping) },
};
 
 
static inline int vlan_validate_qos_map(struct nlattr *attr)
{
        if (!attr)
                return 0;
        return nla_validate_nested(attr, IFLA_VLAN_QOS_MAX, vlan_map_policy);
}
 
static int vlan_validate(struct nlattr *tb[], struct nlattr *data[])
{
        struct ifla_vlan_flags *flags;
        u16 id;
        int err;
 
        if (tb[IFLA_ADDRESS]) {
                if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
                        return -EINVAL;
                if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
                        return -EADDRNOTAVAIL;
        }
 
        if (!data)
                return -EINVAL;
 
        if (data[IFLA_VLAN_ID]) {
                id = nla_get_u16(data[IFLA_VLAN_ID]);
                if (id >= VLAN_VID_MASK)
                        return -ERANGE;
        }
        if (data[IFLA_VLAN_FLAGS]) {
                flags = nla_data(data[IFLA_VLAN_FLAGS]);
                if ((flags->flags & flags->mask) & ~VLAN_FLAG_REORDER_HDR)
                        return -EINVAL;
        }
 
        err = vlan_validate_qos_map(data[IFLA_VLAN_INGRESS_QOS]);
        if (err < 0)
                return err;
        err = vlan_validate_qos_map(data[IFLA_VLAN_EGRESS_QOS]);
        if (err < 0)
                return err;
        return 0;
}
 
static int vlan_changelink(struct net_device *dev,
                           struct nlattr *tb[], struct nlattr *data[])
{
        struct vlan_dev_info *vlan = VLAN_DEV_INFO(dev);
        struct ifla_vlan_flags *flags;
        struct ifla_vlan_qos_mapping *m;
        struct nlattr *attr;
        int rem;
 
        if (data[IFLA_VLAN_FLAGS]) {
                flags = nla_data(data[IFLA_VLAN_FLAGS]);
                vlan->flags = (vlan->flags & ~flags->mask) |
                              (flags->flags & flags->mask);
        }
        if (data[IFLA_VLAN_INGRESS_QOS]) {
                nla_for_each_nested(attr, data[IFLA_VLAN_INGRESS_QOS], rem) {
                        m = nla_data(attr);
                        vlan_dev_set_ingress_priority(dev, m->to, m->from);
                }
        }
        if (data[IFLA_VLAN_EGRESS_QOS]) {
                nla_for_each_nested(attr, data[IFLA_VLAN_EGRESS_QOS], rem) {
                        m = nla_data(attr);
                        vlan_dev_set_egress_priority(dev, m->from, m->to);
                }
        }
        return 0;
}
 
static int vlan_newlink(struct net_device *dev,
                        struct nlattr *tb[], struct nlattr *data[])
{
        struct vlan_dev_info *vlan = VLAN_DEV_INFO(dev);
        struct net_device *real_dev;
        int err;
 
        if (!data[IFLA_VLAN_ID])
                return -EINVAL;
 
        if (!tb[IFLA_LINK])
                return -EINVAL;
        real_dev = __dev_get_by_index(&init_net, nla_get_u32(tb[IFLA_LINK]));
        if (!real_dev)
                return -ENODEV;
 
        vlan->vlan_id  = nla_get_u16(data[IFLA_VLAN_ID]);
        vlan->real_dev = real_dev;
        vlan->flags    = VLAN_FLAG_REORDER_HDR;
 
        err = vlan_check_real_dev(real_dev, vlan->vlan_id);
        if (err < 0)
                return err;
 
        if (!tb[IFLA_MTU])
                dev->mtu = real_dev->mtu;
        else if (dev->mtu > real_dev->mtu)
                return -EINVAL;
 
        err = vlan_changelink(dev, tb, data);
        if (err < 0)
                return err;
 
        return register_vlan_dev(dev);
}
 
static void vlan_dellink(struct net_device *dev)
{
        unregister_vlan_device(dev);
}
 
static inline size_t vlan_qos_map_size(unsigned int n)
{
        if (n == 0)
                return 0;
        /* IFLA_VLAN_{EGRESS,INGRESS}_QOS + n * IFLA_VLAN_QOS_MAPPING */
        return nla_total_size(sizeof(struct nlattr)) +
               nla_total_size(sizeof(struct ifla_vlan_qos_mapping)) * n;
}
 
static size_t vlan_get_size(const struct net_device *dev)
{
        struct vlan_dev_info *vlan = VLAN_DEV_INFO(dev);
 
        return nla_total_size(2) +      /* IFLA_VLAN_ID */
               vlan_qos_map_size(vlan->nr_ingress_mappings) +
               vlan_qos_map_size(vlan->nr_egress_mappings);
}
 
static int vlan_fill_info(struct sk_buff *skb, const struct net_device *dev)
{
        struct vlan_dev_info *vlan = VLAN_DEV_INFO(dev);
        struct vlan_priority_tci_mapping *pm;
        struct ifla_vlan_flags f;
        struct ifla_vlan_qos_mapping m;
        struct nlattr *nest;
        unsigned int i;
 
        NLA_PUT_U16(skb, IFLA_VLAN_ID, VLAN_DEV_INFO(dev)->vlan_id);
        if (vlan->flags) {
                f.flags = vlan->flags;
                f.mask  = ~0;
                NLA_PUT(skb, IFLA_VLAN_FLAGS, sizeof(f), &f);
        }
        if (vlan->nr_ingress_mappings) {
                nest = nla_nest_start(skb, IFLA_VLAN_INGRESS_QOS);
                if (nest == NULL)
                        goto nla_put_failure;
 
                for (i = 0; i < ARRAY_SIZE(vlan->ingress_priority_map); i++) {
                        if (!vlan->ingress_priority_map[i])
                                continue;
 
                        m.from = i;
                        m.to   = vlan->ingress_priority_map[i];
                        NLA_PUT(skb, IFLA_VLAN_QOS_MAPPING,
                                sizeof(m), &m);
                }
                nla_nest_end(skb, nest);
        }
 
        if (vlan->nr_egress_mappings) {
                nest = nla_nest_start(skb, IFLA_VLAN_EGRESS_QOS);
                if (nest == NULL)
                        goto nla_put_failure;
 
                for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) {
                        for (pm = vlan->egress_priority_map[i]; pm;
                             pm = pm->next) {
                                if (!pm->vlan_qos)
                                        continue;
 
                                m.from = pm->priority;
                                m.to   = (pm->vlan_qos >> 13) & 0x7;
                                NLA_PUT(skb, IFLA_VLAN_QOS_MAPPING,
                                        sizeof(m), &m);
                        }
                }
                nla_nest_end(skb, nest);
        }
        return 0;
 
nla_put_failure:
        return -EMSGSIZE;
}
 
struct rtnl_link_ops vlan_link_ops __read_mostly = {
        .kind           = "vlan",
        .maxtype        = IFLA_VLAN_MAX,
        .policy         = vlan_policy,
        .priv_size      = sizeof(struct vlan_dev_info),
        .setup          = vlan_setup,
        .validate       = vlan_validate,
        .newlink        = vlan_newlink,
        .changelink     = vlan_changelink,
        .dellink        = vlan_dellink,
        .get_size       = vlan_get_size,
        .fill_info      = vlan_fill_info,
};
 
int __init vlan_netlink_init(void)
{
        return rtnl_link_register(&vlan_link_ops);
}
 
void __exit vlan_netlink_fini(void)
{
        rtnl_link_unregister(&vlan_link_ops);
}
 
MODULE_ALIAS_RTNL_LINK("vlan");

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[/] [test_project/] [trunk/] [linux_sd_driver/] [net/] [8021q/] [vlan_netlink.c] - Blame information for rev 82

Line No.	Rev	Author	Line
1	62	marcus.erl	`/*`
2			`* VLAN netlink control interface`
3			`*`
4			`* Copyright (c) 2007 Patrick McHardy <kaber@trash.net>`
5			`*`
6			`* This program is free software; you can redistribute it and/or`
7			`* modify it under the terms of the GNU General Public License`
8			`* version 2 as published by the Free Software Foundation.`
9			`*/`
10
11			`#include <linux/kernel.h>`
12			`#include <linux/netdevice.h>`
13			`#include <linux/if_vlan.h>`
14			`#include <net/net_namespace.h>`
15			`#include <net/netlink.h>`
16			`#include <net/rtnetlink.h>`
17			`#include "vlan.h"`
18
19
20			`static const struct nla_policy vlan_policy[IFLA_VLAN_MAX + 1] = {`
21			`[IFLA_VLAN_ID] = { .type = NLA_U16 },`
22			`[IFLA_VLAN_FLAGS] = { .len = sizeof(struct ifla_vlan_flags) },`
23			`[IFLA_VLAN_EGRESS_QOS] = { .type = NLA_NESTED },`
24			`[IFLA_VLAN_INGRESS_QOS] = { .type = NLA_NESTED },`
25			`};`
26
27			`static const struct nla_policy vlan_map_policy[IFLA_VLAN_QOS_MAX + 1] = {`
28			`[IFLA_VLAN_QOS_MAPPING] = { .len = sizeof(struct ifla_vlan_qos_mapping) },`
29			`};`
30
31
32			`static inline int vlan_validate_qos_map(struct nlattr *attr)`
33			`{`
34			`if (!attr)`
35			`return 0;`
36			`return nla_validate_nested(attr, IFLA_VLAN_QOS_MAX, vlan_map_policy);`
37			`}`
38
39			`static int vlan_validate(struct nlattr tb[], struct nlattr data[])`
40			`{`
41			`struct ifla_vlan_flags *flags;`
42			`u16 id;`
43			`int err;`
44
45			`if (tb[IFLA_ADDRESS]) {`
46			`if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)`
47			`return -EINVAL;`
48			`if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))`
49			`return -EADDRNOTAVAIL;`
50			`}`
51
52			`if (!data)`
53			`return -EINVAL;`
54
55			`if (data[IFLA_VLAN_ID]) {`
56			`id = nla_get_u16(data[IFLA_VLAN_ID]);`
57			`if (id >= VLAN_VID_MASK)`
58			`return -ERANGE;`
59			`}`
60			`if (data[IFLA_VLAN_FLAGS]) {`
61			`flags = nla_data(data[IFLA_VLAN_FLAGS]);`
62			`if ((flags->flags & flags->mask) & ~VLAN_FLAG_REORDER_HDR)`
63			`return -EINVAL;`
64			`}`
65
66			`err = vlan_validate_qos_map(data[IFLA_VLAN_INGRESS_QOS]);`
67			`if (err < 0)`
68			`return err;`
69			`err = vlan_validate_qos_map(data[IFLA_VLAN_EGRESS_QOS]);`
70			`if (err < 0)`
71			`return err;`
72			`return 0;`
73			`}`
74
75			`static int vlan_changelink(struct net_device *dev,`
76			`struct nlattr tb[], struct nlattr data[])`
77			`{`
78			`struct vlan_dev_info *vlan = VLAN_DEV_INFO(dev);`
79			`struct ifla_vlan_flags *flags;`
80			`struct ifla_vlan_qos_mapping *m;`
81			`struct nlattr *attr;`
82			`int rem;`
83
84			`if (data[IFLA_VLAN_FLAGS]) {`
85			`flags = nla_data(data[IFLA_VLAN_FLAGS]);`
86			`vlan->flags = (vlan->flags & ~flags->mask) \|`
87			`(flags->flags & flags->mask);`
88			`}`
89			`if (data[IFLA_VLAN_INGRESS_QOS]) {`
90			`nla_for_each_nested(attr, data[IFLA_VLAN_INGRESS_QOS], rem) {`
91			`m = nla_data(attr);`
92			`vlan_dev_set_ingress_priority(dev, m->to, m->from);`
93			`}`
94			`}`
95			`if (data[IFLA_VLAN_EGRESS_QOS]) {`
96			`nla_for_each_nested(attr, data[IFLA_VLAN_EGRESS_QOS], rem) {`
97			`m = nla_data(attr);`
98			`vlan_dev_set_egress_priority(dev, m->from, m->to);`
99			`}`
100			`}`
101			`return 0;`
102			`}`
103
104			`static int vlan_newlink(struct net_device *dev,`
105			`struct nlattr tb[], struct nlattr data[])`
106			`{`
107			`struct vlan_dev_info *vlan = VLAN_DEV_INFO(dev);`
108			`struct net_device *real_dev;`
109			`int err;`
110
111			`if (!data[IFLA_VLAN_ID])`
112			`return -EINVAL;`
113
114			`if (!tb[IFLA_LINK])`
115			`return -EINVAL;`
116			`real_dev = __dev_get_by_index(&init_net, nla_get_u32(tb[IFLA_LINK]));`
117			`if (!real_dev)`
118			`return -ENODEV;`
119
120			`vlan->vlan_id = nla_get_u16(data[IFLA_VLAN_ID]);`
121			`vlan->real_dev = real_dev;`
122			`vlan->flags = VLAN_FLAG_REORDER_HDR;`
123
124			`err = vlan_check_real_dev(real_dev, vlan->vlan_id);`
125			`if (err < 0)`
126			`return err;`
127
128			`if (!tb[IFLA_MTU])`
129			`dev->mtu = real_dev->mtu;`
130			`else if (dev->mtu > real_dev->mtu)`
131			`return -EINVAL;`
132
133			`err = vlan_changelink(dev, tb, data);`
134			`if (err < 0)`
135			`return err;`
136
137			`return register_vlan_dev(dev);`
138			`}`
139
140			`static void vlan_dellink(struct net_device *dev)`
141			`{`
142			`unregister_vlan_device(dev);`
143			`}`
144
145			`static inline size_t vlan_qos_map_size(unsigned int n)`
146			`{`
147			`if (n == 0)`
148			`return 0;`
149			`/* IFLA_VLAN_{EGRESS,INGRESS}_QOS + n * IFLA_VLAN_QOS_MAPPING */`
150			`return nla_total_size(sizeof(struct nlattr)) +`
151			`nla_total_size(sizeof(struct ifla_vlan_qos_mapping)) * n;`
152			`}`
153
154			`static size_t vlan_get_size(const struct net_device *dev)`
155			`{`
156			`struct vlan_dev_info *vlan = VLAN_DEV_INFO(dev);`
157
158			`return nla_total_size(2) + /* IFLA_VLAN_ID */`
159			`vlan_qos_map_size(vlan->nr_ingress_mappings) +`
160			`vlan_qos_map_size(vlan->nr_egress_mappings);`
161			`}`
162
163			`static int vlan_fill_info(struct sk_buff skb, const struct net_device dev)`
164			`{`
165			`struct vlan_dev_info *vlan = VLAN_DEV_INFO(dev);`
166			`struct vlan_priority_tci_mapping *pm;`
167			`struct ifla_vlan_flags f;`
168			`struct ifla_vlan_qos_mapping m;`
169			`struct nlattr *nest;`
170			`unsigned int i;`
171
172			`NLA_PUT_U16(skb, IFLA_VLAN_ID, VLAN_DEV_INFO(dev)->vlan_id);`
173			`if (vlan->flags) {`
174			`f.flags = vlan->flags;`
175			`f.mask = ~0;`
176			`NLA_PUT(skb, IFLA_VLAN_FLAGS, sizeof(f), &f);`
177			`}`
178			`if (vlan->nr_ingress_mappings) {`
179			`nest = nla_nest_start(skb, IFLA_VLAN_INGRESS_QOS);`
180			`if (nest == NULL)`
181			`goto nla_put_failure;`
182
183			`for (i = 0; i < ARRAY_SIZE(vlan->ingress_priority_map); i++) {`
184			`if (!vlan->ingress_priority_map[i])`
185			`continue;`
186
187			`m.from = i;`
188			`m.to = vlan->ingress_priority_map[i];`
189			`NLA_PUT(skb, IFLA_VLAN_QOS_MAPPING,`
190			`sizeof(m), &m);`
191			`}`
192			`nla_nest_end(skb, nest);`
193			`}`
194
195			`if (vlan->nr_egress_mappings) {`
196			`nest = nla_nest_start(skb, IFLA_VLAN_EGRESS_QOS);`
197			`if (nest == NULL)`
198			`goto nla_put_failure;`
199
200			`for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) {`
201			`for (pm = vlan->egress_priority_map[i]; pm;`
202			`pm = pm->next) {`
203			`if (!pm->vlan_qos)`
204			`continue;`
205
206			`m.from = pm->priority;`
207			`m.to = (pm->vlan_qos >> 13) & 0x7;`
208			`NLA_PUT(skb, IFLA_VLAN_QOS_MAPPING,`
209			`sizeof(m), &m);`
210			`}`
211			`}`
212			`nla_nest_end(skb, nest);`
213			`}`
214			`return 0;`
215
216			`nla_put_failure:`
217			`return -EMSGSIZE;`
218			`}`
219
220			`struct rtnl_link_ops vlan_link_ops __read_mostly = {`
221			`.kind = "vlan",`
222			`.maxtype = IFLA_VLAN_MAX,`
223			`.policy = vlan_policy,`
224			`.priv_size = sizeof(struct vlan_dev_info),`
225			`.setup = vlan_setup,`
226			`.validate = vlan_validate,`
227			`.newlink = vlan_newlink,`
228			`.changelink = vlan_changelink,`
229			`.dellink = vlan_dellink,`
230			`.get_size = vlan_get_size,`
231			`.fill_info = vlan_fill_info,`
232			`};`
233
234			`int __init vlan_netlink_init(void)`
235			`{`
236			`return rtnl_link_register(&vlan_link_ops);`
237			`}`
238
239			`void __exit vlan_netlink_fini(void)`
240			`{`
241			`rtnl_link_unregister(&vlan_link_ops);`
242			`}`
243
244			`MODULE_ALIAS_RTNL_LINK("vlan");`