]> git.karo-electronics.de Git - karo-tx-linux.git/blob - drivers/infiniband/ulp/ipoib/ipoib_vlan.c
Merge tag 'mmc-v4.12-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc
[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 #include <linux/sched/signal.h>
35
36 #include <linux/init.h>
37 #include <linux/seq_file.h>
38
39 #include <linux/uaccess.h>
40
41 #include "ipoib.h"
42
43 static ssize_t show_parent(struct device *d, struct device_attribute *attr,
44                            char *buf)
45 {
46         struct net_device *dev = to_net_dev(d);
47         struct ipoib_dev_priv *priv = ipoib_priv(dev);
48
49         return sprintf(buf, "%s\n", priv->parent->name);
50 }
51 static DEVICE_ATTR(parent, S_IRUGO, show_parent, NULL);
52
53 int __ipoib_vlan_add(struct ipoib_dev_priv *ppriv, struct ipoib_dev_priv *priv,
54                      u16 pkey, int type)
55 {
56         int result;
57
58         priv->max_ib_mtu = ppriv->max_ib_mtu;
59         /* MTU will be reset when mcast join happens */
60         priv->dev->mtu   = IPOIB_UD_MTU(priv->max_ib_mtu);
61         priv->mcast_mtu  = priv->admin_mtu = priv->dev->mtu;
62         priv->parent = ppriv->dev;
63         set_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags);
64
65         ipoib_set_dev_features(priv, ppriv->ca);
66
67         priv->pkey = pkey;
68
69         memcpy(priv->dev->dev_addr, ppriv->dev->dev_addr, INFINIBAND_ALEN);
70         memcpy(&priv->local_gid, &ppriv->local_gid, sizeof(priv->local_gid));
71         set_bit(IPOIB_FLAG_DEV_ADDR_SET, &priv->flags);
72         priv->dev->broadcast[8] = pkey >> 8;
73         priv->dev->broadcast[9] = pkey & 0xff;
74
75         result = ipoib_dev_init(priv->dev, ppriv->ca, ppriv->port);
76         if (result < 0) {
77                 ipoib_warn(ppriv, "failed to initialize subinterface: "
78                            "device %s, port %d",
79                            ppriv->ca->name, ppriv->port);
80                 goto err;
81         }
82
83         result = register_netdevice(priv->dev);
84         if (result) {
85                 ipoib_warn(priv, "failed to initialize; error %i", result);
86                 goto register_failed;
87         }
88
89         /* RTNL childs don't need proprietary sysfs entries */
90         if (type == IPOIB_LEGACY_CHILD) {
91                 if (ipoib_cm_add_mode_attr(priv->dev))
92                         goto sysfs_failed;
93                 if (ipoib_add_pkey_attr(priv->dev))
94                         goto sysfs_failed;
95                 if (ipoib_add_umcast_attr(priv->dev))
96                         goto sysfs_failed;
97
98                 if (device_create_file(&priv->dev->dev, &dev_attr_parent))
99                         goto sysfs_failed;
100         }
101
102         priv->child_type  = type;
103         list_add_tail(&priv->list, &ppriv->child_intfs);
104
105         return 0;
106
107 sysfs_failed:
108         result = -ENOMEM;
109         unregister_netdevice(priv->dev);
110
111 register_failed:
112         ipoib_dev_cleanup(priv->dev);
113
114 err:
115         return result;
116 }
117
118 int ipoib_vlan_add(struct net_device *pdev, unsigned short pkey)
119 {
120         struct ipoib_dev_priv *ppriv, *priv;
121         char intf_name[IFNAMSIZ];
122         struct ipoib_dev_priv *tpriv;
123         int result;
124
125         if (!capable(CAP_NET_ADMIN))
126                 return -EPERM;
127
128         ppriv = ipoib_priv(pdev);
129
130         if (test_bit(IPOIB_FLAG_GOING_DOWN, &ppriv->flags))
131                 return -EPERM;
132
133         snprintf(intf_name, sizeof intf_name, "%s.%04x",
134                  ppriv->dev->name, pkey);
135
136         if (!rtnl_trylock())
137                 return restart_syscall();
138
139         priv = ipoib_intf_alloc(ppriv->ca, ppriv->port, intf_name);
140         if (!priv)
141                 return -ENOMEM;
142
143         down_write(&ppriv->vlan_rwsem);
144
145         /*
146          * First ensure this isn't a duplicate. We check the parent device and
147          * then all of the legacy child interfaces to make sure the Pkey
148          * doesn't match.
149          */
150         if (ppriv->pkey == pkey) {
151                 result = -ENOTUNIQ;
152                 goto out;
153         }
154
155         list_for_each_entry(tpriv, &ppriv->child_intfs, list) {
156                 if (tpriv->pkey == pkey &&
157                     tpriv->child_type == IPOIB_LEGACY_CHILD) {
158                         result = -ENOTUNIQ;
159                         goto out;
160                 }
161         }
162
163         result = __ipoib_vlan_add(ppriv, priv, pkey, IPOIB_LEGACY_CHILD);
164
165 out:
166         up_write(&ppriv->vlan_rwsem);
167
168         rtnl_unlock();
169
170         if (result) {
171                 free_netdev(priv->dev);
172                 kfree(priv);
173         }
174
175         return result;
176 }
177
178 int ipoib_vlan_delete(struct net_device *pdev, unsigned short pkey)
179 {
180         struct ipoib_dev_priv *ppriv, *priv, *tpriv;
181         struct net_device *dev = NULL;
182
183         if (!capable(CAP_NET_ADMIN))
184                 return -EPERM;
185
186         ppriv = ipoib_priv(pdev);
187
188         if (test_bit(IPOIB_FLAG_GOING_DOWN, &ppriv->flags))
189                 return -EPERM;
190
191         if (!rtnl_trylock())
192                 return restart_syscall();
193
194         down_write(&ppriv->vlan_rwsem);
195         list_for_each_entry_safe(priv, tpriv, &ppriv->child_intfs, list) {
196                 if (priv->pkey == pkey &&
197                     priv->child_type == IPOIB_LEGACY_CHILD) {
198                         list_del(&priv->list);
199                         dev = priv->dev;
200                         break;
201                 }
202         }
203         up_write(&ppriv->vlan_rwsem);
204
205         if (dev) {
206                 ipoib_dbg(ppriv, "delete child vlan %s\n", dev->name);
207                 unregister_netdevice(dev);
208         }
209
210         rtnl_unlock();
211
212         if (dev) {
213                 free_netdev(dev);
214                 kfree(priv);
215                 return 0;
216         }
217
218         return -ENODEV;
219 }