]> git.kernelconcepts.de Git - karo-tx-linux.git/blob - drivers/infiniband/ulp/ipoib/ipoib_vlan.c
Merge branch 'for-4.8/core' of git://git.kernel.dk/linux-block
[karo-tx-linux.git] / drivers / infiniband / ulp / ipoib / ipoib_vlan.c
1 /*
2  * Copyright (c) 2004 Topspin Communications.  All rights reserved.
3  *
4  * This software is available to you under a choice of one of two
5  * licenses.  You may choose to be licensed under the terms of the GNU
6  * General Public License (GPL) Version 2, available from the file
7  * COPYING in the main directory of this source tree, or the
8  * OpenIB.org BSD license below:
9  *
10  *     Redistribution and use in source and binary forms, with or
11  *     without modification, are permitted provided that the following
12  *     conditions are met:
13  *
14  *      - Redistributions of source code must retain the above
15  *        copyright notice, this list of conditions and the following
16  *        disclaimer.
17  *
18  *      - Redistributions in binary form must reproduce the above
19  *        copyright notice, this list of conditions and the following
20  *        disclaimer in the documentation and/or other materials
21  *        provided with the distribution.
22  *
23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30  * SOFTWARE.
31  */
32
33 #include <linux/module.h>
34
35 #include <linux/init.h>
36 #include <linux/seq_file.h>
37
38 #include <asm/uaccess.h>
39
40 #include "ipoib.h"
41
42 static ssize_t show_parent(struct device *d, struct device_attribute *attr,
43                            char *buf)
44 {
45         struct net_device *dev = to_net_dev(d);
46         struct ipoib_dev_priv *priv = netdev_priv(dev);
47
48         return sprintf(buf, "%s\n", priv->parent->name);
49 }
50 static DEVICE_ATTR(parent, S_IRUGO, show_parent, NULL);
51
52 int __ipoib_vlan_add(struct ipoib_dev_priv *ppriv, struct ipoib_dev_priv *priv,
53                      u16 pkey, int type)
54 {
55         int result;
56
57         priv->max_ib_mtu = ppriv->max_ib_mtu;
58         /* MTU will be reset when mcast join happens */
59         priv->dev->mtu   = IPOIB_UD_MTU(priv->max_ib_mtu);
60         priv->mcast_mtu  = priv->admin_mtu = priv->dev->mtu;
61         priv->parent = ppriv->dev;
62         set_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags);
63
64         result = ipoib_set_dev_features(priv, ppriv->ca);
65         if (result)
66                 goto err;
67
68         priv->pkey = pkey;
69
70         memcpy(priv->dev->dev_addr, ppriv->dev->dev_addr, INFINIBAND_ALEN);
71         memcpy(&priv->local_gid, &ppriv->local_gid, sizeof(priv->local_gid));
72         set_bit(IPOIB_FLAG_DEV_ADDR_SET, &priv->flags);
73         priv->dev->broadcast[8] = pkey >> 8;
74         priv->dev->broadcast[9] = pkey & 0xff;
75
76         result = ipoib_dev_init(priv->dev, ppriv->ca, ppriv->port);
77         if (result < 0) {
78                 ipoib_warn(ppriv, "failed to initialize subinterface: "
79                            "device %s, port %d",
80                            ppriv->ca->name, ppriv->port);
81                 goto err;
82         }
83
84         result = register_netdevice(priv->dev);
85         if (result) {
86                 ipoib_warn(priv, "failed to initialize; error %i", result);
87                 goto register_failed;
88         }
89
90         ipoib_create_debug_files(priv->dev);
91
92         /* RTNL childs don't need proprietary sysfs entries */
93         if (type == IPOIB_LEGACY_CHILD) {
94                 if (ipoib_cm_add_mode_attr(priv->dev))
95                         goto sysfs_failed;
96                 if (ipoib_add_pkey_attr(priv->dev))
97                         goto sysfs_failed;
98                 if (ipoib_add_umcast_attr(priv->dev))
99                         goto sysfs_failed;
100
101                 if (device_create_file(&priv->dev->dev, &dev_attr_parent))
102                         goto sysfs_failed;
103         }
104
105         priv->child_type  = type;
106         list_add_tail(&priv->list, &ppriv->child_intfs);
107
108         return 0;
109
110 sysfs_failed:
111         result = -ENOMEM;
112         ipoib_delete_debug_files(priv->dev);
113         unregister_netdevice(priv->dev);
114
115 register_failed:
116         ipoib_dev_cleanup(priv->dev);
117
118 err:
119         return result;
120 }
121
122 int ipoib_vlan_add(struct net_device *pdev, unsigned short pkey)
123 {
124         struct ipoib_dev_priv *ppriv, *priv;
125         char intf_name[IFNAMSIZ];
126         struct ipoib_dev_priv *tpriv;
127         int result;
128
129         if (!capable(CAP_NET_ADMIN))
130                 return -EPERM;
131
132         ppriv = netdev_priv(pdev);
133
134         if (test_bit(IPOIB_FLAG_GOING_DOWN, &ppriv->flags))
135                 return -EPERM;
136
137         snprintf(intf_name, sizeof intf_name, "%s.%04x",
138                  ppriv->dev->name, pkey);
139         priv = ipoib_intf_alloc(intf_name);
140         if (!priv)
141                 return -ENOMEM;
142
143         if (!rtnl_trylock())
144                 return restart_syscall();
145
146         down_write(&ppriv->vlan_rwsem);
147
148         /*
149          * First ensure this isn't a duplicate. We check the parent device and
150          * then all of the legacy child interfaces to make sure the Pkey
151          * doesn't match.
152          */
153         if (ppriv->pkey == pkey) {
154                 result = -ENOTUNIQ;
155                 goto out;
156         }
157
158         list_for_each_entry(tpriv, &ppriv->child_intfs, list) {
159                 if (tpriv->pkey == pkey &&
160                     tpriv->child_type == IPOIB_LEGACY_CHILD) {
161                         result = -ENOTUNIQ;
162                         goto out;
163                 }
164         }
165
166         result = __ipoib_vlan_add(ppriv, priv, pkey, IPOIB_LEGACY_CHILD);
167
168 out:
169         up_write(&ppriv->vlan_rwsem);
170
171         if (result)
172                 free_netdev(priv->dev);
173
174         rtnl_unlock();
175
176         return result;
177 }
178
179 int ipoib_vlan_delete(struct net_device *pdev, unsigned short pkey)
180 {
181         struct ipoib_dev_priv *ppriv, *priv, *tpriv;
182         struct net_device *dev = NULL;
183
184         if (!capable(CAP_NET_ADMIN))
185                 return -EPERM;
186
187         ppriv = netdev_priv(pdev);
188
189         if (test_bit(IPOIB_FLAG_GOING_DOWN, &ppriv->flags))
190                 return -EPERM;
191
192         if (!rtnl_trylock())
193                 return restart_syscall();
194
195         down_write(&ppriv->vlan_rwsem);
196         list_for_each_entry_safe(priv, tpriv, &ppriv->child_intfs, list) {
197                 if (priv->pkey == pkey &&
198                     priv->child_type == IPOIB_LEGACY_CHILD) {
199                         unregister_netdevice(priv->dev);
200                         list_del(&priv->list);
201                         dev = priv->dev;
202                         break;
203                 }
204         }
205         up_write(&ppriv->vlan_rwsem);
206
207         rtnl_unlock();
208
209         if (dev) {
210                 free_netdev(dev);
211                 return 0;
212         }
213
214         return -ENODEV;
215 }