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72be35fe JP |
1 | /* |
2 | * drivers/net/bond/bond_options.c - bonding options | |
3 | * Copyright (c) 2013 Jiri Pirko <jiri@resnulli.us> | |
eecdaa6e | 4 | * Copyright (c) 2013 Scott Feldman <sfeldma@cumulusnetworks.com> |
72be35fe JP |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | */ | |
11 | ||
12 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
13 | ||
14 | #include <linux/errno.h> | |
15 | #include <linux/if.h> | |
d9e32b21 JP |
16 | #include <linux/netdevice.h> |
17 | #include <linux/rwlock.h> | |
18 | #include <linux/rcupdate.h> | |
72be35fe JP |
19 | #include "bonding.h" |
20 | ||
21 | static bool bond_mode_is_valid(int mode) | |
22 | { | |
23 | int i; | |
24 | ||
25 | for (i = 0; bond_mode_tbl[i].modename; i++); | |
26 | ||
27 | return mode >= 0 && mode < i; | |
28 | } | |
29 | ||
30 | int bond_option_mode_set(struct bonding *bond, int mode) | |
31 | { | |
32 | if (!bond_mode_is_valid(mode)) { | |
33 | pr_err("invalid mode value %d.\n", mode); | |
34 | return -EINVAL; | |
35 | } | |
36 | ||
37 | if (bond->dev->flags & IFF_UP) { | |
38 | pr_err("%s: unable to update mode because interface is up.\n", | |
39 | bond->dev->name); | |
40 | return -EPERM; | |
41 | } | |
42 | ||
43 | if (bond_has_slaves(bond)) { | |
44 | pr_err("%s: unable to update mode because bond has slaves.\n", | |
45 | bond->dev->name); | |
46 | return -EPERM; | |
47 | } | |
48 | ||
fe9d04af | 49 | if (BOND_NO_USES_ARP(mode) && bond->params.arp_interval) { |
50 | pr_info("%s: %s mode is incompatible with arp monitoring, start mii monitoring\n", | |
51 | bond->dev->name, bond_mode_tbl[mode].modename); | |
52 | /* disable arp monitoring */ | |
53 | bond->params.arp_interval = 0; | |
54 | /* set miimon to default value */ | |
55 | bond->params.miimon = BOND_DEFAULT_MIIMON; | |
56 | pr_info("%s: Setting MII monitoring interval to %d.\n", | |
57 | bond->dev->name, bond->params.miimon); | |
72be35fe JP |
58 | } |
59 | ||
60 | /* don't cache arp_validate between modes */ | |
61 | bond->params.arp_validate = BOND_ARP_VALIDATE_NONE; | |
62 | bond->params.mode = mode; | |
63 | return 0; | |
64 | } | |
d9e32b21 | 65 | |
752d48b5 JP |
66 | static struct net_device *__bond_option_active_slave_get(struct bonding *bond, |
67 | struct slave *slave) | |
68 | { | |
69 | return USES_PRIMARY(bond->params.mode) && slave ? slave->dev : NULL; | |
70 | } | |
71 | ||
72 | struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond) | |
73 | { | |
74 | struct slave *slave = rcu_dereference(bond->curr_active_slave); | |
75 | ||
76 | return __bond_option_active_slave_get(bond, slave); | |
77 | } | |
78 | ||
79 | struct net_device *bond_option_active_slave_get(struct bonding *bond) | |
80 | { | |
81 | return __bond_option_active_slave_get(bond, bond->curr_active_slave); | |
82 | } | |
83 | ||
d9e32b21 JP |
84 | int bond_option_active_slave_set(struct bonding *bond, |
85 | struct net_device *slave_dev) | |
86 | { | |
87 | int ret = 0; | |
88 | ||
89 | if (slave_dev) { | |
90 | if (!netif_is_bond_slave(slave_dev)) { | |
91 | pr_err("Device %s is not bonding slave.\n", | |
92 | slave_dev->name); | |
93 | return -EINVAL; | |
94 | } | |
95 | ||
96 | if (bond->dev != netdev_master_upper_dev_get(slave_dev)) { | |
97 | pr_err("%s: Device %s is not our slave.\n", | |
98 | bond->dev->name, slave_dev->name); | |
99 | return -EINVAL; | |
100 | } | |
101 | } | |
102 | ||
103 | if (!USES_PRIMARY(bond->params.mode)) { | |
104 | pr_err("%s: Unable to change active slave; %s is in mode %d\n", | |
105 | bond->dev->name, bond->dev->name, bond->params.mode); | |
106 | return -EINVAL; | |
107 | } | |
108 | ||
109 | block_netpoll_tx(); | |
110 | read_lock(&bond->lock); | |
111 | write_lock_bh(&bond->curr_slave_lock); | |
112 | ||
113 | /* check to see if we are clearing active */ | |
114 | if (!slave_dev) { | |
115 | pr_info("%s: Clearing current active slave.\n", | |
116 | bond->dev->name); | |
117 | rcu_assign_pointer(bond->curr_active_slave, NULL); | |
118 | bond_select_active_slave(bond); | |
119 | } else { | |
120 | struct slave *old_active = bond->curr_active_slave; | |
121 | struct slave *new_active = bond_slave_get_rtnl(slave_dev); | |
122 | ||
123 | BUG_ON(!new_active); | |
124 | ||
125 | if (new_active == old_active) { | |
126 | /* do nothing */ | |
127 | pr_info("%s: %s is already the current active slave.\n", | |
128 | bond->dev->name, new_active->dev->name); | |
129 | } else { | |
130 | if (old_active && (new_active->link == BOND_LINK_UP) && | |
131 | IS_UP(new_active->dev)) { | |
132 | pr_info("%s: Setting %s as active slave.\n", | |
133 | bond->dev->name, new_active->dev->name); | |
134 | bond_change_active_slave(bond, new_active); | |
135 | } else { | |
136 | pr_err("%s: Could not set %s as active slave; either %s is down or the link is down.\n", | |
137 | bond->dev->name, new_active->dev->name, | |
138 | new_active->dev->name); | |
139 | ret = -EINVAL; | |
140 | } | |
141 | } | |
142 | } | |
143 | ||
144 | write_unlock_bh(&bond->curr_slave_lock); | |
145 | read_unlock(&bond->lock); | |
146 | unblock_netpoll_tx(); | |
147 | return ret; | |
148 | } | |
eecdaa6e | 149 | |
150 | int bond_option_miimon_set(struct bonding *bond, int miimon) | |
151 | { | |
152 | if (miimon < 0) { | |
153 | pr_err("%s: Invalid miimon value %d not in range %d-%d; rejected.\n", | |
154 | bond->dev->name, miimon, 0, INT_MAX); | |
155 | return -EINVAL; | |
156 | } | |
157 | pr_info("%s: Setting MII monitoring interval to %d.\n", | |
158 | bond->dev->name, miimon); | |
159 | bond->params.miimon = miimon; | |
160 | if (bond->params.updelay) | |
161 | pr_info("%s: Note: Updating updelay (to %d) since it is a multiple of the miimon value.\n", | |
162 | bond->dev->name, | |
163 | bond->params.updelay * bond->params.miimon); | |
164 | if (bond->params.downdelay) | |
165 | pr_info("%s: Note: Updating downdelay (to %d) since it is a multiple of the miimon value.\n", | |
166 | bond->dev->name, | |
167 | bond->params.downdelay * bond->params.miimon); | |
168 | if (miimon && bond->params.arp_interval) { | |
169 | pr_info("%s: MII monitoring cannot be used with ARP monitoring. Disabling ARP monitoring...\n", | |
170 | bond->dev->name); | |
171 | bond->params.arp_interval = 0; | |
172 | if (bond->params.arp_validate) | |
173 | bond->params.arp_validate = BOND_ARP_VALIDATE_NONE; | |
174 | } | |
175 | if (bond->dev->flags & IFF_UP) { | |
176 | /* If the interface is up, we may need to fire off | |
177 | * the MII timer. If the interface is down, the | |
178 | * timer will get fired off when the open function | |
179 | * is called. | |
180 | */ | |
181 | if (!miimon) { | |
182 | cancel_delayed_work_sync(&bond->mii_work); | |
183 | } else { | |
184 | cancel_delayed_work_sync(&bond->arp_work); | |
185 | queue_delayed_work(bond->wq, &bond->mii_work, 0); | |
186 | } | |
187 | } | |
188 | return 0; | |
189 | } | |
25852e29 | 190 | |
191 | int bond_option_updelay_set(struct bonding *bond, int updelay) | |
192 | { | |
193 | if (!(bond->params.miimon)) { | |
194 | pr_err("%s: Unable to set up delay as MII monitoring is disabled\n", | |
195 | bond->dev->name); | |
196 | return -EPERM; | |
197 | } | |
198 | ||
199 | if (updelay < 0) { | |
200 | pr_err("%s: Invalid up delay value %d not in range %d-%d; rejected.\n", | |
201 | bond->dev->name, updelay, 0, INT_MAX); | |
202 | return -EINVAL; | |
203 | } else { | |
204 | if ((updelay % bond->params.miimon) != 0) { | |
205 | pr_warn("%s: Warning: up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n", | |
206 | bond->dev->name, updelay, | |
207 | bond->params.miimon, | |
208 | (updelay / bond->params.miimon) * | |
209 | bond->params.miimon); | |
210 | } | |
211 | bond->params.updelay = updelay / bond->params.miimon; | |
212 | pr_info("%s: Setting up delay to %d.\n", | |
213 | bond->dev->name, | |
214 | bond->params.updelay * bond->params.miimon); | |
215 | } | |
216 | ||
217 | return 0; | |
218 | } | |
c7461f9b | 219 | |
220 | int bond_option_downdelay_set(struct bonding *bond, int downdelay) | |
221 | { | |
222 | if (!(bond->params.miimon)) { | |
223 | pr_err("%s: Unable to set down delay as MII monitoring is disabled\n", | |
224 | bond->dev->name); | |
225 | return -EPERM; | |
226 | } | |
227 | ||
228 | if (downdelay < 0) { | |
229 | pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n", | |
230 | bond->dev->name, downdelay, 0, INT_MAX); | |
231 | return -EINVAL; | |
232 | } else { | |
233 | if ((downdelay % bond->params.miimon) != 0) { | |
234 | pr_warn("%s: Warning: down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n", | |
235 | bond->dev->name, downdelay, | |
236 | bond->params.miimon, | |
237 | (downdelay / bond->params.miimon) * | |
238 | bond->params.miimon); | |
239 | } | |
240 | bond->params.downdelay = downdelay / bond->params.miimon; | |
241 | pr_info("%s: Setting down delay to %d.\n", | |
242 | bond->dev->name, | |
243 | bond->params.downdelay * bond->params.miimon); | |
244 | } | |
245 | ||
246 | return 0; | |
247 | } |