1 /*
2 * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
3 * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
4 *
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the
9 * OpenIB.org BSD license below:
10 *
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
13 * conditions are met:
14 *
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
17 * disclaimer.
18 *
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
31 * SOFTWARE.
32 */
33
34 #include "rxe.h"
35 #include "rxe_net.h"
36
37 /* Copy argument and remove trailing CR. Return the new length. */
sanitize_arg(const char * val,char * intf,int intf_len)38 static int sanitize_arg(const char *val, char *intf, int intf_len)
39 {
40 int len;
41
42 if (!val)
43 return 0;
44
45 /* Remove newline. */
46 for (len = 0; len < intf_len - 1 && val[len] && val[len] != '\n'; len++)
47 intf[len] = val[len];
48 intf[len] = 0;
49
50 if (len == 0 || (val[len] != 0 && val[len] != '\n'))
51 return 0;
52
53 return len;
54 }
55
rxe_set_port_state(struct net_device * ndev)56 static void rxe_set_port_state(struct net_device *ndev)
57 {
58 struct rxe_dev *rxe = net_to_rxe(ndev);
59 bool is_up = netif_running(ndev) && netif_carrier_ok(ndev);
60
61 if (!rxe)
62 goto out;
63
64 if (is_up)
65 rxe_port_up(rxe);
66 else
67 rxe_port_down(rxe); /* down for unknown state */
68 out:
69 return;
70 }
71
rxe_param_set_add(const char * val,const struct kernel_param * kp)72 static int rxe_param_set_add(const char *val, const struct kernel_param *kp)
73 {
74 int len;
75 int err = 0;
76 char intf[32];
77 struct net_device *ndev = NULL;
78 struct rxe_dev *rxe;
79
80 len = sanitize_arg(val, intf, sizeof(intf));
81 if (!len) {
82 pr_err("add: invalid interface name\n");
83 err = -EINVAL;
84 goto err;
85 }
86
87 ndev = dev_get_by_name(&init_net, intf);
88 if (!ndev) {
89 pr_err("interface %s not found\n", intf);
90 err = -EINVAL;
91 goto err;
92 }
93
94 if (net_to_rxe(ndev)) {
95 pr_err("already configured on %s\n", intf);
96 err = -EINVAL;
97 goto err;
98 }
99
100 rxe = rxe_net_add(ndev);
101 if (!rxe) {
102 pr_err("failed to add %s\n", intf);
103 err = -EINVAL;
104 goto err;
105 }
106
107 rxe_set_port_state(ndev);
108 pr_info("added %s to %s\n", rxe->ib_dev.name, intf);
109 err:
110 if (ndev)
111 dev_put(ndev);
112 return err;
113 }
114
rxe_param_set_remove(const char * val,const struct kernel_param * kp)115 static int rxe_param_set_remove(const char *val, const struct kernel_param *kp)
116 {
117 int len;
118 char intf[32];
119 struct rxe_dev *rxe;
120
121 len = sanitize_arg(val, intf, sizeof(intf));
122 if (!len) {
123 pr_err("add: invalid interface name\n");
124 return -EINVAL;
125 }
126
127 if (strncmp("all", intf, len) == 0) {
128 pr_info("rxe_sys: remove all");
129 rxe_remove_all();
130 return 0;
131 }
132
133 rxe = get_rxe_by_name(intf);
134
135 if (!rxe) {
136 pr_err("not configured on %s\n", intf);
137 return -EINVAL;
138 }
139
140 list_del(&rxe->list);
141 rxe_remove(rxe);
142
143 return 0;
144 }
145
146 static const struct kernel_param_ops rxe_add_ops = {
147 .set = rxe_param_set_add,
148 };
149
150 static const struct kernel_param_ops rxe_remove_ops = {
151 .set = rxe_param_set_remove,
152 };
153
154 module_param_cb(add, &rxe_add_ops, NULL, 0200);
155 MODULE_PARM_DESC(add, "Create RXE device over network interface");
156 module_param_cb(remove, &rxe_remove_ops, NULL, 0200);
157 MODULE_PARM_DESC(remove, "Remove RXE device over network interface");
158
